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学者姓名：吴啸
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Abstract ：
A small electrocaloric effect (ECE) is usually observed in aliovalent doped ferroelectric ceramics since decreased polarization is usually present. In this work, the high ECE is achieved in a barium titanate [BaTiO 3 (BT)]-based ceramic by introducing defect polarization to enhance the ferroelectric polarization and polarization change. The defect dipoles consisting of donor ion and barium vacancy, or barium and oxygen vacancies were formed in samarium-doped (Ba 1- 1.5 x Sm x )TiO 3 ceramics. The phase and defect structures, and dielectric and ferroelectric properties are analyzed to confirm the evolution of charge compensation states and defect structures, and the influences of defects on polarization rotation and ECE. An enhanced ferroelectric polarization and high internal bias field are present in the ceramic with a suitable defect dipole effect, leading to a high polarization change before/after applying an electric field, causing an enhanced ECE. Finally, a high electrocaloric temperature change of -1.11 K and a large electrocaloric strength of -0.037 K & sdot; cm kV -1 were achieved under a low electric field of 30 kV/cm, indicating that forming suitable defect dipoles can optimize the ECE. This work provides a significant paradigm for tuning ECE in ferroelectric materials via defect regulation.
Keyword ：
BT-based ferroelectric ceramics BT-based ferroelectric ceramics Defect regulation Defect regulation Enhanced ferroelectricity Enhanced ferroelectricity High electrocaloric effect High electrocaloric effect
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| GB/T 7714 | Feng, Haopeng , Wen, Huajin , Huang, Yanli et al. Low-electric-field-induced high electrocaloric properties via defect regulation in samarium-doped BaTiO 3 ceramics [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 989 . |
| MLA | Feng, Haopeng et al. "Low-electric-field-induced high electrocaloric properties via defect regulation in samarium-doped BaTiO 3 ceramics" . | JOURNAL OF ALLOYS AND COMPOUNDS 989 (2024) . |
| APA | Feng, Haopeng , Wen, Huajin , Huang, Yanli , Wu, Bo , Wu, Wenjuan , Wu, Xiao et al. Low-electric-field-induced high electrocaloric properties via defect regulation in samarium-doped BaTiO 3 ceramics . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 989 . |
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开展改性香蒲绒纤维对大体量变压器废油的吸附能力研究。制备了不同的改性香蒲绒纤维样品，并研究了其对小体量和大体量变压器油的吸附能力。研究结果表明：采用摩尔浓度为25.0 mmol/L的NaOH溶液浸泡12 h进行碱处理可得到具有最佳吸油性能的香蒲绒纤维，其吸油容量达(39.25±1.77) g/g;吸附大体量变压器油时，重力对香蒲绒的挤压作用会减弱其吸油容量和吸油率。研究结果对促进生物质纤维材料在油料存储、废油吸附等领域的应用具有重要作用。
Keyword ：
化学改性 化学改性 变压器油 变压器油 吸附性能 吸附性能 大体量 大体量 香蒲绒纤维 香蒲绒纤维
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| GB/T 7714 | 徐智新 , 廖诗敏 , 陈晟 et al. 改性香蒲绒纤维材料对大体量变压器油的吸附性能 [J]. | 东华大学学报(自然科学版) , 2024 , 50 (02) : 31-38 . |
| MLA | 徐智新 et al. "改性香蒲绒纤维材料对大体量变压器油的吸附性能" . | 东华大学学报(自然科学版) 50 . 02 (2024) : 31-38 . |
| APA | 徐智新 , 廖诗敏 , 陈晟 , 宋临春 , 黄妍妍 , 蔡万迁 et al. 改性香蒲绒纤维材料对大体量变压器油的吸附性能 . | 东华大学学报(自然科学版) , 2024 , 50 (02) , 31-38 . |
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Compared with powder particles, ceramic block piezocatalyst possesses the advantages of high cycle stability, decreasing secondary pollution, and easy recovery. Herein, with a simple strategy of the poling procedure, the piezocatalytic activity of 0.96K(0.5)Na(0.5)NbO(3)-0.04Bi(0.5)Na(0.5)ZrO(3) (abbreviated as 0.96KNN-0.04BNZ) ceramic blocks can be considerably improved. A reaction rate constant k value of 14.70x10(-3) min(-1) in the poled sample can be obtained to degrade Rhodamine B, which is 3.44 times that of the unpoled one. Meanwhile, the poled sample also has good degradation effects against methylene blue and amino black 10B. The improvement of piezocatalytic activities originates from the reduction of crystal symmetry and the enhancement of electron-hole pair separation, which accelerates the generation of charge carriers. This research displays a unique lead-free bulk piezocatalyst and a convenient method for enhancing its piezocatalytic activity.
Keyword ：
ceramic blocks ceramic blocks piezocatalyst piezocatalyst poling poling potassium sodium niobate potassium sodium niobate
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| GB/T 7714 | Xie, Ziqian , Jiao, Jiabin , Hu, Meimin et al. Poling-induced enhancement of piezocatalytic performance of 0.96K0.5Na0.5NbO3-0.04Bi0.5Na0.5ZrO3 ceramic blocks [J]. | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2024 , 107 (8) : 5512-5523 . |
| MLA | Xie, Ziqian et al. "Poling-induced enhancement of piezocatalytic performance of 0.96K0.5Na0.5NbO3-0.04Bi0.5Na0.5ZrO3 ceramic blocks" . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY 107 . 8 (2024) : 5512-5523 . |
| APA | Xie, Ziqian , Jiao, Jiabin , Hu, Meimin , Zhao, Chunlin , Wu, Xiao , Lin, Tengfei et al. Poling-induced enhancement of piezocatalytic performance of 0.96K0.5Na0.5NbO3-0.04Bi0.5Na0.5ZrO3 ceramic blocks . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2024 , 107 (8) , 5512-5523 . |
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Previous bismuth-based photocatalysts usually employ a strong acid solution (e.g., HNO3 solution) to obtain an ultrathin structure toward high photocatalytic activity. In this work, the ultrathin layered BiOIO3 nanosheets are successfully synthesized using just the glucose hydrothermal solution. The high-concentration glucose solution shows the obvious acidity after the hydrothermal process, which leads to the quick decrease in thickness of BiOIO3 nanosheets from similar to 45.58 to similar to 5.74 nm. The ultrathin structure can greatly improve charge carriers' separation and transfer efficiency. The generation of reductive iodide ions brings about oxygen vacancies in the ultrathin nanosheets, then the defect energy level is formed, causing the decreased band gap and improving the visible light absorption. Compared to thick BiOIO3 nanosheet with little oxygen vacancies, much higher carrier separation efficiency and visible light absorption are achieved in the ultrathin nanosheets with oxygen vacancies, resulting in an excellent photocatalytic performance (0.1980 min(-1) for RhB degradation), which is much higher than most other bismuth-based photocatalysts. The superoxide radicals (O-center dot(2)-) and holes (h(+)) are the major active species responsible for high photocatalytic activity. This work affords an environmentally friendly strategy to synthesize ultrathin photocatalysts with superior photocatalytic properties.
Keyword ：
BiOIO3 BiOIO3 glucose hydrothermal synthesizing glucose hydrothermal synthesizing highphotocatalytic activity highphotocatalytic activity oxygenvacancies oxygenvacancies ultrathin nanosheets ultrathin nanosheets
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| GB/T 7714 | Wang, Yabin , Fu, Hanxin , Chen, Yan et al. Ultrathin Layered Structure and Oxygen Vacancies Mediated Efficient Charge Separation toward High Photocatalytic Activity in BiOIO3 Nanosheets [J]. | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (5) : 5977-5988 . |
| MLA | Wang, Yabin et al. "Ultrathin Layered Structure and Oxygen Vacancies Mediated Efficient Charge Separation toward High Photocatalytic Activity in BiOIO3 Nanosheets" . | ACS APPLIED MATERIALS & INTERFACES 16 . 5 (2024) : 5977-5988 . |
| APA | Wang, Yabin , Fu, Hanxin , Chen, Yan , Wu, Bo , Lin, Cong , Wu, Xiao et al. Ultrathin Layered Structure and Oxygen Vacancies Mediated Efficient Charge Separation toward High Photocatalytic Activity in BiOIO3 Nanosheets . | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (5) , 5977-5988 . |
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The Fenton reaction, an effective advanced oxidation process (AOP) for degrading organic pollutants, requires the addition of H 2 O 2 that is expensive and not environmentally friendly to some extent. It has been reported that piezocatalysis can generate H 2 O 2 under mechanical excitation. Therefore, it is promising to carry out the Fenton catalysis utilizing in situ H 2 O 2 generated by piezocatalysis. However, the current piezocatalysis-assisted Fenton (Piezo-Fenton) reaction was realized by adding piezoelectric nanoparticles and Fe(II) ions to pollutant solutions, which would induce more iron-based chemicals that are not easy to recycle. Herein, Fe 3 O 4 -BaTiO 3 nanocomposites were prepared to demonstrate the feasibility of piezo-Fenton catalysis without the addition of H 2 O 2 or Fe(II) ions. The organic dye degradation efficiency of 98.2% is obtained using Fe 3 O 4 -BaTiO 3 nanocomposites in the acidic solution, one-third and two-thrid greater than that of pure piezocatalysis and that of iron-based Fenton reaction, respectively. Moreover, since the piezocatalysis process is the rate-determining step of the whole piezo-Fenton reaction, all the H 2 O 2 generated can be consumed. Considering that the solid nanocomposites can be magnetically recycled, piezo-Fenton catalysis leaves no additional chemicals in clean water and thus provides an environmentally friendly and low-cost approach for organic dye degradation.
Keyword ：
Magnet Magnet Piezo-Fenton synergistic catalysis Piezo-Fenton synergistic catalysis Recyclability Recyclability
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| GB/T 7714 | Xie, Jiaxing , Liu, Qun , Huang, Lijuan et al. Piezo-Fenton catalysis in Fe 3 O 4-BaTiO 3 nanocomposites: A low-cost and highly efficient degradation method without the additive of H 2 O 2 or Fe (II) ions [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 487 . |
| MLA | Xie, Jiaxing et al. "Piezo-Fenton catalysis in Fe 3 O 4-BaTiO 3 nanocomposites: A low-cost and highly efficient degradation method without the additive of H 2 O 2 or Fe (II) ions" . | CHEMICAL ENGINEERING JOURNAL 487 (2024) . |
| APA | Xie, Jiaxing , Liu, Qun , Huang, Lijuan , Chen, Xingyu , Zhao, Chunlin , Wu, Xiao et al. Piezo-Fenton catalysis in Fe 3 O 4-BaTiO 3 nanocomposites: A low-cost and highly efficient degradation method without the additive of H 2 O 2 or Fe (II) ions . | CHEMICAL ENGINEERING JOURNAL , 2024 , 487 . |
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In this work, the frequency dependence of ferroelectric and electrocaloric properties in barium titanate-based ceramics was studied based on Maxwell relations. It is found that the maximum and remnant polarization will decrease while the coercive field increases a lot with rising frequency from 0.1 to 10Hz, indicating that polarization rotation and domain switching become difficult at high frequencies. The electrocaloric properties show the different frequency dependence at different phase structures. Isothermal entropy change (Delta S) and adiabatic temperature change (Delta T) are similar around/above Curie temperature (TC), showing tiny frequency dependence. However, Delta S and Delta T display the obvious frequency dependence below TC, especially in the orthorhombic-tetragonal phase-transition region with a stable ferroelectric phase, and this frequency dependence becomes more obvious under a low-electric field. It is also found that increasing the frequency can weaken the electric field dependence of electrocaloric strength. This work gives a general profile of frequency dependence for electrocaloric properties in ferroelectric ceramics.
Keyword ：
barium titanate barium titanate Electrocaloric properties Electrocaloric properties ferroelectric ceramics ferroelectric ceramics frequency dependence frequency dependence
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| GB/T 7714 | Shu, Wanting , Li, Hong , Huang, Yanli et al. Frequency-dependent ferroelectric and electrocaloric properties in barium titanate-based ceramics based on Maxwell relations [J]. | JOURNAL OF ADVANCED DIELECTRICS , 2024 , 14 (02) . |
| MLA | Shu, Wanting et al. "Frequency-dependent ferroelectric and electrocaloric properties in barium titanate-based ceramics based on Maxwell relations" . | JOURNAL OF ADVANCED DIELECTRICS 14 . 02 (2024) . |
| APA | Shu, Wanting , Li, Hong , Huang, Yanli , Lin, Cong , Wu, Xiao , Gao, Min et al. Frequency-dependent ferroelectric and electrocaloric properties in barium titanate-based ceramics based on Maxwell relations . | JOURNAL OF ADVANCED DIELECTRICS , 2024 , 14 (02) . |
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Due to the high ionic conductivity and low cost, Li1.3Al0.3Ti1.7(PO4)(3) (LATP) has emerged as a promising solid-state electrolyte for next-generation Li metal solid-state batteries. However, the susceptibility of LATP to side reactions with Li metal and the significant resistance at grain boundaries pose major challenges for the applications of all-solid-state batteries. In this work, the non-equilibrium microstructure at the interface of a LATP composite solid electrolyte (84 wt% LATP and 16 wt% LiTFSI) was adjusted by two-step cold sintering, reducing interfacial transport barriers for optimizing ionic transport paths and reducing sensitivity to Li metal anodes, thus increasing the ionic conductivity and interfacial stability of solid electrolytes. While preserving the original grain structure, the grain boundary resistance was significantly reduced, resulting in an impressive ionic conductivity of 7.3 x 10(-4) S cm(-1). Additionally, the solid electrolyte had a high density of 97% and demonstrated excellent interfacial compatibility and electrochemical stability by maintaining stable cycling for 2300 h at 0.1 mA h cm(-2). This further demonstrates the favorable effect of the non-equilibrium microstructure on ion transport across grain boundaries and enhancing interfacial stability, which is crucial for achieving high performance. In conclusion, two-step cold sintering, with its unique process, offers significant advantages in modulating the interfacial microstructure and presents a novel solution for interfacial engineering.
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| GB/T 7714 | Jiao, Jiabin , Xie, Ziqian , Zhang, Yangdong et al. Two-step cold sintering of Li1.3Al0.3Ti1.7(PO4)3 composite solid electrolyte with non-equilibrium microstructures for enhanced electrochemical performance [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2024 , 12 (16) : 9766-9777 . |
| MLA | Jiao, Jiabin et al. "Two-step cold sintering of Li1.3Al0.3Ti1.7(PO4)3 composite solid electrolyte with non-equilibrium microstructures for enhanced electrochemical performance" . | JOURNAL OF MATERIALS CHEMISTRY A 12 . 16 (2024) : 9766-9777 . |
| APA | Jiao, Jiabin , Xie, Ziqian , Zhang, Yangdong , Zhao, Chunlin , Wu, Xiao , Lin, Tengfei et al. Two-step cold sintering of Li1.3Al0.3Ti1.7(PO4)3 composite solid electrolyte with non-equilibrium microstructures for enhanced electrochemical performance . | JOURNAL OF MATERIALS CHEMISTRY A , 2024 , 12 (16) , 9766-9777 . |
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High entropy perovskite oxides (HEPOs) have received increasing attention due to their appealing photocatalytic activity. Considering their excellent ferroelectric properties used as energy storage capacitors, it is promising for HEPOs to exhibit remarkable pizeo-photocatalytic properties. Herein, (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3 (BNBKL) HEPO powders were prepared by the traditional solid-state reaction method to demonstrate the advantages of HEPO in the piezo-photocatalytic degradation of organic contaminants. The results evidence that the BNBKL HEPO has excellent catalytic activity compared to traditional piezo-photocatalysis, which is fundamentally based on the high-entropy-induced band structure reconstruction and severer lattice distortions, shedding light on a viable and universal strategy for substantially enhancing the catalytic efficiency of piezo-photocatalyst.
Keyword ：
Dye degradation Dye degradation High entropy oxide High entropy oxide Organic dye pollutants Organic dye pollutants Perovskite Perovskite Piezo-photocatalysts Piezo-photocatalysts
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| GB/T 7714 | Fu, Hanxin , Li, Su , Lin, Yanchen et al. Enhancement of piezo-photocatalytic activity in perovskite (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3 oxides via high entropy induced lattice distortion and energy band reconfiguration [J]. | CERAMICS INTERNATIONAL , 2024 , 50 (6) : 9159-9168 . |
| MLA | Fu, Hanxin et al. "Enhancement of piezo-photocatalytic activity in perovskite (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3 oxides via high entropy induced lattice distortion and energy band reconfiguration" . | CERAMICS INTERNATIONAL 50 . 6 (2024) : 9159-9168 . |
| APA | Fu, Hanxin , Li, Su , Lin, Yanchen , Wu, Xiao , Lin, Tengfei , Zhao, Chunlin et al. Enhancement of piezo-photocatalytic activity in perovskite (Bi0.2Na0.2Ba0.2K0.2La0.2)TiO3 oxides via high entropy induced lattice distortion and energy band reconfiguration . | CERAMICS INTERNATIONAL , 2024 , 50 (6) , 9159-9168 . |
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Optical information encryption is closely related to information security, and smart hydrogels with tunable optical properties under external stimuli have received much attention as optical storage materials. However, it is still challenging to achieve complex information camouflage and large-capacity information storage in hydrogel systems. Herein, a hybrid encoding strategy afforded by an aggregation-induced emission (AIE) fluorescent hydrogel with multi-stimuli responsiveness is pioneered as a feasible alternative for multiple camouflage strategies. More specifically, the photoluminescence intensity of a system can be independently or mutually tuned by specific stimuli, including solvent (DMSO/H2O), pH (NaOH/HCl), and metal ions (Fe3+/EDTA(2-)), leading to the precise protection or decoding of encrypted information. That is, only the correct stimulus sequence can unlock the stored real information, thus enabling the system with the functionality of multilayer encryption and on-demand decryption of information. We envisage that the present strategy of multiple information carrying and showcasing in AIE hydrogels through stimulation sequence regulation exhibits great potential for secure information writing and anticounterfeit encryption.
Keyword ：
AIE hydrogel AIE hydrogel anticounterfeiting anticounterfeiting hybridencoding strategy hybridencoding strategy information encryption information encryption stimulus-responsive hydrogel stimulus-responsive hydrogel
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| GB/T 7714 | Li, Zhou , Xia, Biao , Lin, Tengfei et al. Hybrid Encoding Strategy of Multi-Stimulus Response Aggregation-Induced Emission Hydrogels for Advanced Information Encryption and Safety [J]. | ACS APPLIED POLYMER MATERIALS , 2024 , 6 (2) : 1422-1428 . |
| MLA | Li, Zhou et al. "Hybrid Encoding Strategy of Multi-Stimulus Response Aggregation-Induced Emission Hydrogels for Advanced Information Encryption and Safety" . | ACS APPLIED POLYMER MATERIALS 6 . 2 (2024) : 1422-1428 . |
| APA | Li, Zhou , Xia, Biao , Lin, Tengfei , Gao, Min , Zhao, Chunlin , Wu, Xiao et al. Hybrid Encoding Strategy of Multi-Stimulus Response Aggregation-Induced Emission Hydrogels for Advanced Information Encryption and Safety . | ACS APPLIED POLYMER MATERIALS , 2024 , 6 (2) , 1422-1428 . |
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Transparent dielectric ceramics are splendid candidates for transparent pulse capacitors (TPCs) due to splendid cycle stability and large power density. However, the performance and service life of TPCs at present are threatened by overheating damage caused by dielectric loss. Here, a cooperative optimization strategy of microstructure control and superparaelectric regional regulation is proposed to simultaneously achieve excellent energy storage performance and real-time temperature monitoring function in NaNbO3-based ceramics. By introducing aliovalent ions and oxides with large bandgap energy, the size of polar nanoregions is continuously reduced. Due to the combined effect of increased relaxor behavior and fine grains, excellent comprehensive performances are obtained through doping appropriate amounts of Bi, Yb, Tm, and Zr, Ta, Hf in A- and B-sites of the NaNbO3 matrix, including recoverable energy storage density (5.39 J cm(-3)), extremely high energy storage efficiency (91.97%), ultra-fast discharge time (29 ns), and superior optical transmittance (approximate to 47.5% at 736 nm). Additionally, the phenomenon of abnormal fluorescent negative thermal expansion is realized due to activation mechanism of surface phonon at high temperatures that can promote the formation of [YbO]-Tm3+ pairs, showing great potential in real-time temperature monitoring of TPCs. This research provides ideas for developing electronic devices with multiple functionalities.
Keyword ：
cooperative optimization cooperative optimization energy storage energy storage fluorescent negative thermal expansion fluorescent negative thermal expansion superparaelectric superparaelectric transparent ceramics transparent ceramics
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| GB/T 7714 | Zeng, Xiangfu , Lin, Jinfeng , Chen, Yan et al. Superior Energy Storage Capability and Fluorescence Negative Thermal Expansion of NaNbO3-Based Transparent Ceramics by Synergistic Optimization [J]. | SMALL , 2024 , 20 (24) . |
| MLA | Zeng, Xiangfu et al. "Superior Energy Storage Capability and Fluorescence Negative Thermal Expansion of NaNbO3-Based Transparent Ceramics by Synergistic Optimization" . | SMALL 20 . 24 (2024) . |
| APA | Zeng, Xiangfu , Lin, Jinfeng , Chen, Yan , Wang, Simin , Zhou, Ping , Yu, Fangyuan et al. Superior Energy Storage Capability and Fluorescence Negative Thermal Expansion of NaNbO3-Based Transparent Ceramics by Synergistic Optimization . | SMALL , 2024 , 20 (24) . |
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