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Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light SCIE
期刊论文 | 2025 , 715 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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Abstract :

The desired anticorrosive effect of rebar through photocathodic protection of TiO2 is challenging due to its wide bandgap and high recombination rate of photogenerated carriers. This study demonstrates that the CuInSe2/TiO2 nanocomposites, which consist of novel TiO2 nanobowls and CuInSe2 nanoparticles, can significantly enhance the corrosion-resistant performance of HRB400 steel rebar. The CuInSe2/TiO2 nanocomposite films, featuring an n-n heterostructure, were fabricated by hydrothermally synthesizing n-type CuInSe2 nanoparticles onto anodic oxidation-prepared n-type TiO2 nanobowl films. Notably, the CuInSe2 nanoparticles significantly enhanced the light absorption properties of TiO2, particularly in the visible light range. The presence of heterogeneous interfaces in the CuInSe2/TiO2 films effectively reduced the carrier recombination rate. Under visible light irradiation, the photocurrent density of CuInSe2/TiO2 photoanode (CT-5: 17.37 mu A/cm2) was significantly higher compared to that observed for the TiO2 photoanode (1.05 mu A/cm2). Moreover, in a simulated concrete pore solution containing 3.5 wt% NaCl, the photocathodic protection potential (OCP value) of HRB400 rebar coupled with CT-5 was approximately -820 mV (vs. SCE), which is significantly more negative than that of the -630 mV observed for the rebar coupled with TiO2. Therefore, the novel CuInSe2/TiO2 n-n heterojunction films exhibited remarkable photocathodic protection for the HRB400 rebar, demonstrating that the heterojunction enhances the corrosion resistance of TiO2 for steel rebars.

Keyword :

CuInSe 2 CuInSe 2 HRB400 steel rebar HRB400 steel rebar Photocathodic protection Photocathodic protection Simulated concrete pore solution Simulated concrete pore solution

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GB/T 7714 Wang, Wencheng , Yu, Haoyang , Yang, Zhengxian et al. Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light [J]. | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2025 , 715 .
MLA Wang, Wencheng et al. "Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light" . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 715 (2025) .
APA Wang, Wencheng , Yu, Haoyang , Yang, Zhengxian , Wang, Wenhui , Zhang, Qichao , Jiang, Yishan et al. Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2025 , 715 .
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Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light Scopus
期刊论文 | 2025 , 715 | Colloids and Surfaces A: Physicochemical and Engineering Aspects
Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light EI
期刊论文 | 2025 , 715 | Colloids and Surfaces A: Physicochemical and Engineering Aspects
Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis SCIE
期刊论文 | 2025 , 15 (6) | APPLIED SCIENCES-BASEL
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Abstract :

To examine the effect of flocculation treatment on slurry clogging during vacuum preloading, this study conducted vacuum preloading model tests using lime, anionic polyacrylamide (APAM), and the dual use of polyaluminum chloride (PAC) and APAM in conjunction with particle image velocimetry (PIV) analysis. The results demonstrated that flocculation treatment enhanced the efficiency of vacuum preloading and mitigated the clogging of slurry. Compared to untreated slurry, the lime-flocculated slurry exhibited an approximately 248% increase in pore water pressure dissipation, a 462% increase in clogging zone width, and an 80% improvement in slurry strength near the PVD. The dual use of PAC and APAM significantly improved the slurry's filtration performance by approximately 77 s, resulting in the highest water discharge rate (47% higher than untreated slurry) under vacuum pressure. In contrast, APAM alone enhanced the water discharge rate primarily in the early stages of vacuum preloading but had a limited effect on the final water discharge volume and horizontal strain. Furthermore, this study investigated the evolution of the clogging zone in flocculated slurry and elucidated the underlying mechanism of flocculation in mitigating the clogging of slurry. The findings can provide a theoretical basis for the selection of flocculants and the arrangement of PVDs in large-scale land reclamation and dredged slurry treatment projects.

Keyword :

clogging clogging dredged slurry dredged slurry flocculation flocculation particle image velocimetry particle image velocimetry vacuum preloading vacuum preloading

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GB/T 7714 Lu, Jingling , Zhang, Xuexing , Yang, Zhengxian et al. Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis [J]. | APPLIED SCIENCES-BASEL , 2025 , 15 (6) .
MLA Lu, Jingling et al. "Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis" . | APPLIED SCIENCES-BASEL 15 . 6 (2025) .
APA Lu, Jingling , Zhang, Xuexing , Yang, Zhengxian , Xu, Shanlin . Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis . | APPLIED SCIENCES-BASEL , 2025 , 15 (6) .
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Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis EI
期刊论文 | 2025 , 15 (6) | Applied Sciences (Switzerland)
Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis Scopus
期刊论文 | 2025 , 15 (6) | Applied Sciences (Switzerland)
Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures SCIE
期刊论文 | 2025 , 471 | CONSTRUCTION AND BUILDING MATERIALS
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Ternary blended cement represents a promising option for effectively reducing CO2 emissions caused by cement production. This study examines the hydration kinetics of ternary cement containing ultrafine steel slag (USS) and blast-furnace slag (BFS) at elevated temperatures. The results reveal that high-temperature curing significantly accelerates the hydration kinetics of the ternary cement. The governing mechanism of the hydration reaction evolves with increasing temperature. The hydration rate at 60 degrees C experiences a notable acceleration, accompanied by a decrease in the induction period and an enhancement alumina reaction, transitioning the hydration kinetics from NG-*I-*D to NG-*D. The low reactivity and inert components of USS lead to the tendency of forming a relatively loose microstructure of hardened paste. In contrast, the flocculent C(-A)-S-H gel formed after incorporating BFS contributes to a denser and more uniform microstructure, owing to the synergistic hydration effect between USS and BFS. Moreover, increasing the temperature promotes the hydration reactions of f-CaO and f-MgO, thereby enhancing the apparent density of the reaction products and reducing the risk caused by volume instability. The findings address a key limitation of SS-based binders and emphasizes the potential of USS-BFS ternary cement as a sustainable alternative with reduced environmental impact.

Keyword :

Hydration kinetics Hydration kinetics Microstructure Microstructure Synergistic hydration effect Synergistic hydration effect Temperature Temperature Ternary cement Ternary cement

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GB/T 7714 Li, Kang , Yang, Zhengxian , Dong, Shilin et al. Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 471 .
MLA Li, Kang et al. "Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures" . | CONSTRUCTION AND BUILDING MATERIALS 471 (2025) .
APA Li, Kang , Yang, Zhengxian , Dong, Shilin , Ning, Pingping , Ye, Dejun , Zhang, Yong . Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 471 .
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Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures Scopus
期刊论文 | 2025 , 471 | Construction and Building Materials
Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures EI
期刊论文 | 2025 , 471 | Construction and Building Materials
The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres SCIE
期刊论文 | 2025 , 460 | CONSTRUCTION AND BUILDING MATERIALS
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Abstract :

The production of concrete involves substantial consumption of non-renewable resources, while the high porosity of pervious concrete makes it prone to colonization by microorganisms, causing clog and strength loss. This study develops photocatalytic alkali-activated steel slag pervious concrete (PASSPC) utilizing Cu-ZnO/gC3N4 hybrid hetero-microspheres as the photocatalyst, steel slag and ground granulated blast furnace slag as the blended binder, and coarse steel slag as the aggregate. The photocatalytic antibacterial properties, volume stability, and strength of PASSPC with different contents of Cu-ZnO/g-C3N4 were investigated. The antibacterial mechanism of PASSPC was investigated using electron paramagnetic resonance and the results revealed that with 1.2 wt% Cu-ZnO/g-C3N4 (by weight to binder) addition, PASSPC reached a 99.68 % antibacterial ratio under visible light irradiation. Cu-ZnO/g-C3N4 exhibits a dual effect on PASSPC by delaying binder hardening while promoting hydration in later stages, resulting in decreased 3 d compressive strength, followed by increased 28 d compressive strength compared to the blank samples. In addition, Cu-ZnO/g-C3N4 improves the microstructure and interfacial transition zone of PASSPC, effectively mitigating the adverse effects of steel slag instability through a dual buffering mechanism provided by macro- and micro-pores.

Keyword :

Antibacterial properties Antibacterial properties Cu-ZnO/g-C3N4 hybrid hetero-microspheres Cu-ZnO/g-C3N4 hybrid hetero-microspheres Pervious concrete Pervious concrete Steel slag Steel slag Visible light irradiation Visible light irradiation

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GB/T 7714 Li, Kang , Yang, Zhengxian , Lu, Lin et al. The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 460 .
MLA Li, Kang et al. "The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres" . | CONSTRUCTION AND BUILDING MATERIALS 460 (2025) .
APA Li, Kang , Yang, Zhengxian , Lu, Lin , Li, Yiming , Wang, Wencheng , Duan, Jizhou et al. The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 460 .
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The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres EI
期刊论文 | 2025 , 460 | Construction and Building Materials
The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres Scopus
期刊论文 | 2025 , 460 | Construction and Building Materials
Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review SCIE
期刊论文 | 2025 , 105 | JOURNAL OF BUILDING ENGINEERING
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Abstract :

This review paper carefully examines ion-doped non-hydraulic calcium silicates' carbonation behavior and properties, notably gamma-C2S, C3S2, and CS, emerging as viable materials for sustainable construction applications. The carbonation process of these materials offers the combined benefits of increased durability and CO2 sequestration, providing a potential pathway to mitigate the environmental impact of conventional cement. Through foreign ion doping (e.g., barium, magnesium, and sodium), carbonation reactivity and compressive strength are significantly enhanced due to the formation of stable calcium carbonate polymorphs (such as calcite and aragonite) and densified matrices. Magnesium doping is noted for its efficacy, yielding a 40 % enhancement in carbonation reactivity and an increase of up to 115 MPa in compressive strength of gamma-C2S under optimal curing conditions. Key experimental parameters, such as CO2 concentration, temperature, and relative humidity, influence carbonation reactivity and are essential for the pilot-scale application of these materials in the construction industry. The review also discusses future research directions, including the potential for multi-dopant systems, AI-based curing optimization, and long-term durability studies under varied environmental conditions. This review provides a fundamental perspective on the current advances and challenges of using ion-doped nonhydraulic calcium silicates as sustainable binders in the construction sector.

Keyword :

Calcium silicates Calcium silicates Carbonation properties Carbonation properties Carbon sequestration Carbon sequestration Ion-doped Ion-doped

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GB/T 7714 Ndzila, Jaures Syntyche , Yang, Zhengxian . Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 .
MLA Ndzila, Jaures Syntyche et al. "Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review" . | JOURNAL OF BUILDING ENGINEERING 105 (2025) .
APA Ndzila, Jaures Syntyche , Yang, Zhengxian . Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review . | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 .
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Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review EI
期刊论文 | 2025 , 105 | Journal of Building Engineering
Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review Scopus
期刊论文 | 2025 , 105 | Journal of Building Engineering
Effect of synthetic fibers on early and long-term performance of UHPC: A review SCIE
期刊论文 | 2025 , 101 | JOURNAL OF BUILDING ENGINEERING
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Abstract :

Ultra-high-performance concrete (UHPC) is renowned for its exceptional strength and durability, but the undesirable high material cost due to the considerable expense of reinforcing steel fiber hinders its wide application. The incorporation of more sustainable and light synthetic fibers presents a promising avenue for lowering the price and weight of UHPC while affecting the rheological and hardened behavior of UHPC. This paper conducts a comprehensive review of the key parameters of synthetic fibers, including content, aspect ratio, and surface properties, and their impacts on the fresh properties, mechanical performance, durability, and volume stability of UHPC. Particular emphasis is placed on the early and long-term performance of UHPC. Additionally, the sustainability of UHPC with various types of synthetic fibers is compared. By delving into these aspects, this study aims to furnish a constructive reference for engineers and decisionmakers regarding the utilization of synthetic fibers in UHPC to achieve optimal early and longterm performance.

Keyword :

Ductility Ductility Durability Durability Sustainability Sustainability Synthetic fibers Synthetic fibers UHPC UHPC Volume stability Volume stability

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GB/T 7714 Yang, Zhengxian , Zheng, Zelong , Xu, Pu et al. Effect of synthetic fibers on early and long-term performance of UHPC: A review [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 101 .
MLA Yang, Zhengxian et al. "Effect of synthetic fibers on early and long-term performance of UHPC: A review" . | JOURNAL OF BUILDING ENGINEERING 101 (2025) .
APA Yang, Zhengxian , Zheng, Zelong , Xu, Pu , Ning, Pingping , Hu, Jie , Petrou, Michael F. et al. Effect of synthetic fibers on early and long-term performance of UHPC: A review . | JOURNAL OF BUILDING ENGINEERING , 2025 , 101 .
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Effect of synthetic fibers on early and long-term performance of UHPC: A review Scopus
期刊论文 | 2025 , 101 | Journal of Building Engineering
Effect of synthetic fibers on early and long-term performance of UHPC: A review EI
期刊论文 | 2025 , 101 | Journal of Building Engineering
Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag SCIE
期刊论文 | 2024 , 97 | JOURNAL OF BUILDING ENGINEERING
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Abstract :

The steel slag and ground granulated blast furnace slag with high fineness exhibit synergistic effects on hydration progress and can be introduced into concrete in high volume. In this paper, the simulated pore solution (SPS) of ternary cement incorporating ultrafine steel slag (US) and ultrafine ground granulated blast furnace slag (UG) was prepared to examine the passivation behavior of the HRB400 reinforcing steel under SPS. It is found that the rapid growth of passive films occurs primarily within the initial 2-3 days after immersion in the SPS, while the compaction of passive films takes place mainly at the later stages. The open circuit potential and charge transfer resistance of the passive films initially increase and then decrease with the continuous rise in the US content. The Fe2O3 constitutes a significant portion of the passive films above the steels treated with the SPS irrespective of US dosages, whereas the content of FeO is highly influenced by US dosages. The UG-US-C pore solution could enhance the passivation behavior because of lower Ca2+ and higher Na+. In case of UG/US ratio at 2:3, the passive film exhibits the greatest thickness at 7.5 nm and meanwhile with the highest compaction and the least roughness.

Keyword :

Electrochemical properties Electrochemical properties Passive films Passive films Reinforcing steel Reinforcing steel Simulated pore solution Simulated pore solution Surface characteristics Surface characteristics Ultrafine steel slag Ultrafine steel slag

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GB/T 7714 Yang, Zhengxian , Zheng, Mingye , Xiong, Xiaoli et al. Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 .
MLA Yang, Zhengxian et al. "Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag" . | JOURNAL OF BUILDING ENGINEERING 97 (2024) .
APA Yang, Zhengxian , Zheng, Mingye , Xiong, Xiaoli , Zhang, Yong , Briseghella, Bruno , Marano, Giuseppe Carlo . Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag . | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 .
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Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag EI
期刊论文 | 2024 , 97 | Journal of Building Engineering
Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag Scopus
期刊论文 | 2024 , 97 | Journal of Building Engineering
Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability SCIE
期刊论文 | 2024 , 12 (6) | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
WoS CC Cited Count: 1
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Abstract :

NOx is a harmful gas that causes respiratory diseases and acid rain. Commonly used photocatalysts for degrading NOx such as UV responsive TiO2 show weak photocatalytic degradation efficiency under visible light. Furthermore, the great concern is that the degradation product, nitrates (NO3), from NOx could be washed away and increase the nitrogen deposition and eutrophication in the surrounding soil and aquatic environments, resulting in serious secondary pollution. To address these issues, this study proposes a novel solution by incorporating S-g-C3N4/MgAl-CLDH nanocomposites into a cementitious system which features high NOx degradation efficiency under visible light condition and the efficient capture and adsorption of NO3 in situ. The NOx degradation was comprehensively studied, encompassing the influencing factors and stability. The mechanism for NO3 adsorption process was expounded using the isothermal model. The results show that the amount of exposed S-g-C3N4/MgAl-CLDH and the contact area between S-g-C3N4/MgAl-CLDH and NOx are the essential reasons affecting the NOx degradation. The NOx degradation ability of photocatalytic mortar exhibits excellent stability with the NOx removal ratio decreasing by only 4.8 % and 14.5% after ten consecutive tests and 120 min of ultrasonic washing, respectively. Furthermore, S-g-C3N4/MgAl-CLDH increases the NO3 adsorption capacity of photocatalytic mortar by about 1.5 times, and the adsorption process of NO3 follows the Freundlich isotherm. The study offers an alternate method for designing innovative nanocomposites in cement-based materials to control environmental pollution.

Keyword :

Grey correlation analysis Grey correlation analysis NO3-adsorption NO3-adsorption Photocatalytic cement mortar Photocatalytic cement mortar

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GB/T 7714 Lu, Lin , Yang, Zhengxian , Li, Bo et al. Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (6) .
MLA Lu, Lin et al. "Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 12 . 6 (2024) .
APA Lu, Lin , Yang, Zhengxian , Li, Bo , Ye, Dejun , Luo, Shengyang , Marano, Giuseppe Carlo . Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (6) .
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Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability Scopus
期刊论文 | 2024 , 12 (6) | Journal of Environmental Chemical Engineering
Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability EI
期刊论文 | 2024 , 12 (6) | Journal of Environmental Chemical Engineering
New S-g-C3N4 based photocatalytic mortar with long-term photocatalytic performance by constructing three-dimensional structure Mg-Al layered double hydroxides SCIE
期刊论文 | 2024 , 438 | CONSTRUCTION AND BUILDING MATERIALS
WoS CC Cited Count: 1
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Abstract :

The weak long-term photocatalytic performance of photocatalytic cementitious materials under real-life service conditions has always been one of the main factors restricting their large-scale application. A novel stable threedimensional structure of S-g-C3N4/MgAl-LDH was constructed by composing S-g-C3N4 with MgAl-LDH, aiming to improve its compatibility with cement mortar to achieve ideal long-term photocatalytic performance under natural exposure. Taking S-g-C3N4 as reference, the possible contributions of MgAl-LDH on improving the mechanical strength and long-term photocatalytic performance of mortar was analyzed by XRD, TG/DTG, SEM-EDX and isothermal calorimetry. The result shows that since the high specific surface area and refinement of MgAl-LDH, the dense surface morphology and fewer surface defects jointly promote the improvement of strength. When the content of S-g-C3N4/MgAl-LDH is 6 %, the 28d compressive strength of composite mortar is excellent, which is 28.7 % higher than the pure cement mortar. More importantly, under the stimulation of the calcium-rich layer on the surface of S-g-C3N4/MgAl-LDH, the accumulation of a large amount of gelling hydration products is beneficial to the stable long-term photocatalytic performance of S-g-C3N4/MgAl-LDH doped mortar. After 180 days of natural exposure, the NOx removal rate of the CMSL-8 % sample can still remain at 68.3 % of the original value (328 mu mol center dot m(-2)center dot h(-1)). This research provides a new theoretical basis for photocatalytic cementitious materials to achieve ideal long-term photocatalytic performance.

Keyword :

Cementitious material Cementitious material Long-term photocatalytic performance Long-term photocatalytic performance Mechanical strength Mechanical strength Natural exposure test Natural exposure test S-g-C3N4/MgAl-LDH S-g-C3N4/MgAl-LDH

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GB/T 7714 Xu, Jiankun , Yang, Zhengxian , Lu, Lin et al. New S-g-C3N4 based photocatalytic mortar with long-term photocatalytic performance by constructing three-dimensional structure Mg-Al layered double hydroxides [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 438 .
MLA Xu, Jiankun et al. "New S-g-C3N4 based photocatalytic mortar with long-term photocatalytic performance by constructing three-dimensional structure Mg-Al layered double hydroxides" . | CONSTRUCTION AND BUILDING MATERIALS 438 (2024) .
APA Xu, Jiankun , Yang, Zhengxian , Lu, Lin , Wang, Wencheng , Briseghella, Bruno , Marano, Giuseppe Carlo . New S-g-C3N4 based photocatalytic mortar with long-term photocatalytic performance by constructing three-dimensional structure Mg-Al layered double hydroxides . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 438 .
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New S-g-C3N4 based photocatalytic mortar with long-term photocatalytic performance by constructing three-dimensional structure Mg-Al layered double hydroxides EI
期刊论文 | 2024 , 438 | Construction and Building Materials
New S-g-C3N4 based photocatalytic mortar with long-term photocatalytic performance by constructing three-dimensional structure Mg-Al layered double hydroxides Scopus
期刊论文 | 2024 , 438 | Construction and Building Materials
Effect of dry-wet cycling on NOx degradation and sterilization properties of cement mortar with g-C3N4 /CoAl-LDH SCIE
期刊论文 | 2024 , 12 (3) | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
WoS CC Cited Count: 4
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Abstract :

The influencing mechanism of dry-wet cycling on the NO x degradation and sterilization properties of photocatalytic cement mortar (PCM) with g-C 3 N 4 /CoAl-LDH was investigated through the optical properties, mineral composition of cement hydration products, pore characteristics and nitrogen (N) content. The results indicate that as the cycle number increases, the N content, band gap, Urbach energy, NO x degradation rate and sterilization rate exhibit periodic variations, while the peak intensity of CH (a cement hydration product) decreases gradually. After 10 cycles, PCM demonstrates the maximum Urbach energy, N content, NO x degradation and sterilization rate, as well as the minimum band gap. At this stage, the Urbach energy, N content, NO x degradation and sterilization rate of PCM with 1.0 % g-C 3 N 4 /CoAl-LDH increase by 16.2 %, 24.9 %, 15.4 % and 40.8 %, while the band gap and the CH peak intensity decrease by 5.4 % and 23.4 %, respectively. Although the NO x degradation and sterilization rates of PCM exhibit periodic fluctuations during the dry-wet cycling, both of them surpass those before the cycles, which shows the excellent photocatalytic durability of PCM. It is expected that this study not only presents a new perspective on evaluating the durability of PCM 's photocatalytic property, but also provides an alternative approach for the design of new multifunctional nanocomposites in cementitious materials for environmental pollution control.

Keyword :

Dry-wet cycling Dry-wet cycling G-C3N4/CoAl-LDH G-C3N4/CoAl-LDH NOx degradation NOx degradation Photocatalytic cement mortar Photocatalytic cement mortar Sterilization Sterilization

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GB/T 7714 Lu, Lin , Yang, Zhengxian , Hong, Rongcan et al. Effect of dry-wet cycling on NOx degradation and sterilization properties of cement mortar with g-C3N4 /CoAl-LDH [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (3) .
MLA Lu, Lin et al. "Effect of dry-wet cycling on NOx degradation and sterilization properties of cement mortar with g-C3N4 /CoAl-LDH" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 12 . 3 (2024) .
APA Lu, Lin , Yang, Zhengxian , Hong, Rongcan , Briseghella, Bruno , Marano, Giuseppe Carlo . Effect of dry-wet cycling on NOx degradation and sterilization properties of cement mortar with g-C3N4 /CoAl-LDH . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (3) .
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Effect of dry-wet cycling on NOx degradation and sterilization properties of cement mortar with g-C3N4/CoAl-LDH EI
期刊论文 | 2024 , 12 (3) | Journal of Environmental Chemical Engineering
Effect of dry-wet cycling on NOx degradation and sterilization properties of cement mortar with g-C3N4/CoAl-LDH Scopus
期刊论文 | 2024 , 12 (3) | Journal of Environmental Chemical Engineering
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