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学者姓名：祝淑颖
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Abstract ：
本文针对现有物理化学实验教材中的“乙酸乙酯皂化反应速率常数的测定”实验进行改进和拓展。首先，以夹套烧杯为皂化反应池，通过恒温水循环及磁力搅拌确保了实验过程中溶液浓度均匀、温度恒定；其次，取一定体积浓度为0.01 mol·L~(-1)的氢氧化钠溶液于反应池中待恒温后测定电导率值，记为κ_0，再使用微量取样器取等摩尔数的乙酸乙酯加入到反应器中并同时计时，测定不同时间的电导率值，记为κ_t；第三，通过数据归一化处理消除了电极常数的影响，使物理量意义明确、实验现象直观。改进后的实验步骤减少、数据测量准确性提高，可以测量高温条件下、快速的皂化反应速率常数，在有限的课时内学生可以通过分工协作、共享数据，获得表观活化能及指前因子。
Keyword ：
指前因子 指前因子 物理化学实验 物理化学实验 皂化反应 皂化反应 表观活化能 表观活化能 速率常数 速率常数
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| GB/T 7714 | 祝淑颖 , 吴舒婷 , 郑欧 . 乙酸乙酯皂化反应速率常数的测定实验改进和拓展 [J]. | 大学化学 , 2024 , 39 (04) : 107-113 . |
| MLA | 祝淑颖 等. "乙酸乙酯皂化反应速率常数的测定实验改进和拓展" . | 大学化学 39 . 04 (2024) : 107-113 . |
| APA | 祝淑颖 , 吴舒婷 , 郑欧 . 乙酸乙酯皂化反应速率常数的测定实验改进和拓展 . | 大学化学 , 2024 , 39 (04) , 107-113 . |
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Visible-light-driven N-2 reduction into NH3 in pure H2O provides an energy-saving alternative to the Haber-Bosch process for ammonia synthesizing. However, the thermodynamic stability of N equivalent to N and low water solubility of N-2 remain the key bottlenecks. Here, we propose a solution by developing a WO3-x hollow sphere with oxygen vacancies. Experimental analysis reveals that the hollow sphere structure greatly promotes the enrichment of N-2 molecules in the inner cavity and facilitates the chemisorption of N-2 onto WO3-x-HS. The outer layer's thin shell facilitates the photogenerated charge transfer and the full exposure of O vacancies as active sites. O vacancies exposed on the surface accelerate the activation of N equivalent to N triple bonds. As such, the optimized catalyst shows a NH3 generation rate of 140.08 mu mol g(-1) h(-1), which is 7.94 times higher than the counterpart WO3-bulk.
Keyword ：
hollow sphere hollow sphere N-2 reduction N-2 reduction O defect O defect photocatalysis photocatalysis WO3 WO3
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| GB/T 7714 | Xia, Yuzhou , Xia, Xinghe , Zhu, Shuying et al. Synergistic Spatial Confining Effect and O Vacancy in WO3 Hollow Sphere for Enhanced N2 Reduction [J]. | MOLECULES , 2023 , 28 (24) . |
| MLA | Xia, Yuzhou et al. "Synergistic Spatial Confining Effect and O Vacancy in WO3 Hollow Sphere for Enhanced N2 Reduction" . | MOLECULES 28 . 24 (2023) . |
| APA | Xia, Yuzhou , Xia, Xinghe , Zhu, Shuying , Liang, Ruowen , Yan, Guiyang , Chen, Feng et al. Synergistic Spatial Confining Effect and O Vacancy in WO3 Hollow Sphere for Enhanced N2 Reduction . | MOLECULES , 2023 , 28 (24) . |
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The synergistic of organic transformation with H2 production in one redox cycle is highly desirable to achieve the full use of photogenerated holes and electrons but challenging. Herein, Lewis acid-base nanocatalysts in which Ni decorated defective ZnIn2S4 (denoted as Ni/VZIS) has been prepared through photodeposition with Zn defective ZnIn2S4 nanosheets as precursor. The Zn vacancies favors the selective deposition of Ni, enabling the co-exposure of Lewis acid Ni and Lewis base S adjacent dual active sites. In-situ FTIR results reveal the coexistence of Ni and Zn vacancy on ZnIn2S4 favored the chemisorption of benzyl alcohol. The electron-deficient Ni Lewis acid (LA) site and electron-rich S Lewis base (LB) site can act as benzyl alcohol conversion and H2 evolution sites, respectively, thus facilitating the full use of photoinduced electrons and holes. The spectroscopy and photoelectrochemical studies demonstrate the transfer and separation of photogenerated carries are also facilitated in the nanohybrids. As such, the Ni/VZIS photocatalyst show outstanding performance of photocatalytic conversion benzyl alcohol (BA) into benzaldehyde (BAD) and H2, with the optimal H2 generation rate of 81.9 mmol h-1, accompanying benzaldehyde generation rate of 73.7 mmol h-1. This work provides a profound insight into the designing of multi-functionalized nanohybrids for the full use of photoexcited electrons-holes pairs.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Keyword ：
H 2 production H 2 production Lewis acid-base nanocatalysts Lewis acid-base nanocatalysts Ni modification Ni modification Selective oxidation Selective oxidation Zn vacancy Zn vacancy
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| GB/T 7714 | Xia, Yuzhou , Chen, Lu , Liang, Ruowen et al. Bifunctional Lewis acid-base nanocatalysts with dual active sites for strengthened coupling of alcohol conversion and H2 evolution [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 51 : 1598-1607 . |
| MLA | Xia, Yuzhou et al. "Bifunctional Lewis acid-base nanocatalysts with dual active sites for strengthened coupling of alcohol conversion and H2 evolution" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 51 (2023) : 1598-1607 . |
| APA | Xia, Yuzhou , Chen, Lu , Liang, Ruowen , Liu, Xiyao , Yan, Guiyang , Zhu, Shuying et al. Bifunctional Lewis acid-base nanocatalysts with dual active sites for strengthened coupling of alcohol conversion and H2 evolution . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 51 , 1598-1607 . |
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Dye-sensitized photocatalysis has been extensively studied for photocatalytic solar energy conversion due to the advantage in capturing long-wavelength photons with a high absorption coefficient.The rational integration of photosensitizer with semiconductor and cocatalyst to collaboratively operate in one system is highly desired.Here,we fabricate a Ni(OH)2-loaded titanate nanosheet(Ni(OH)2/H2Ti6O13)composite for high-performance dye-sensitized photocatalytic CO2 reduction.The ultrathin H2Ti6O13 nanosheets with negative surface charge provide an excellent support to anchor the dye photosensitizer,while the loaded Ni(OH)2 serves as an adsorbent of CO2 and electron sink of photoelectrons.As such,the photoelectrons derived from the[Ru(bpy)3]Cl2 sensitizer can be targeted transfer to the Ni(OH)2 active sites via the H2Ti6O13 nanosheets linker.A high CO production rate of 1801 μmol g-1 h-1 is obtained over the optimal Ni(OH)2/H2Ti6O13,while the pure H2Ti6O13 shows significantly lower CO2 reduction performance.The work is anticipated to trigger more research attention on the rational design and synthesis of earth-abundant transition metal-based cocatalysts decorated on ultrathin 2D platforms for artificially photocatalytic CO2 reduction.
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| GB/T 7714 | Wanru Liao , Suwei Lu , Weihang Chen et al. Rationally designed ultrathin Ni(OH)2/titanate nanosheet heterostructure for photocatalytic CO2 reduction [J]. | 绿色化学工程（英文） , 2022 , 3 (3) : 240-249 . |
| MLA | Wanru Liao et al. "Rationally designed ultrathin Ni(OH)2/titanate nanosheet heterostructure for photocatalytic CO2 reduction" . | 绿色化学工程（英文） 3 . 3 (2022) : 240-249 . |
| APA | Wanru Liao , Suwei Lu , Weihang Chen , Shuying Zhu , Yuzhou Xia , Min-Quan Yang et al. Rationally designed ultrathin Ni(OH)2/titanate nanosheet heterostructure for photocatalytic CO2 reduction . | 绿色化学工程（英文） , 2022 , 3 (3) , 240-249 . |
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The photocatalytic reduction of CO2 into energy-intensive hydrocarbon fuels is promising to solve environment and energy issues. Here, elemental sulfur supported on ultrathin titanic acid nanosheets (S/HTO) heterostructure is designed and synthesized by loading different weight contents of elemental S on HTO nanosheets via a simple in-situ disproportionation-assembly process. The as-designed S/HTO heterostructure not only enhances light absorption and facilitates CO2 adsorption, but also significantly promotes the interfacial charge transport, and suppresses the recombination of photogenerated charge carriers. As a consequence, the as-prepared S/HTO heterostructure exhibits enhanced performance in photocatalytic CO2 reduction under simulated solar light illumination. A CH4 yield rate of 1.92 mu mol h-1 g-1 is obtained over the optimal 15S/HTO composite without the using of cocatalyst and sacrificial agent. The photoactivity is 5.4-fold and 23-fold larger than that of HTO nanosheets and blank S, respectively. In addition, the S/HTO hybrid composite also presents high stability for the production of CH4.
Keyword ：
CH 4 production CH 4 production CO 2 reduction CO 2 reduction Sulfur Sulfur Titanic acid nanosheet Titanic acid nanosheet Two-dimensional heterostructure Two-dimensional heterostructure
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| GB/T 7714 | Lu, Suwei , Liao, Wanru , Chen, Weihang et al. Elemental sulfur supported on ultrathin titanic acid nanosheets for photocatalytic reduction of CO2 to CH4 [J]. | APPLIED SURFACE SCIENCE , 2022 , 614 . |
| MLA | Lu, Suwei et al. "Elemental sulfur supported on ultrathin titanic acid nanosheets for photocatalytic reduction of CO2 to CH4" . | APPLIED SURFACE SCIENCE 614 (2022) . |
| APA | Lu, Suwei , Liao, Wanru , Chen, Weihang , Yang, Min-Quan , Zhu, Shuying , Liang, Shijing . Elemental sulfur supported on ultrathin titanic acid nanosheets for photocatalytic reduction of CO2 to CH4 . | APPLIED SURFACE SCIENCE , 2022 , 614 . |
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Dye-sensitized photocatalysis has been extensively studied for photocatalytic solar energy conversion due to the advantage in capturing long-wavelength photons with a high absorption coefficient. The rational integration of photosensitizer with semiconductor and cocatalyst to collaboratively operate in one system is highly desired. Here, we fabricate a Ni(OH)2-loaded titanate nanosheet (Ni(OH)2/H2Ti6O13) composite for high-performance dye-sensitized photocatalytic CO2 reduction. The ultrathin H2Ti6O13 nanosheets with negative surface charge provide an excellent support to anchor the dye photosensitizer, while the loaded Ni(OH)2 serves as an adsorbent of CO2 and electron sink of photoelectrons. As such, the photoelectrons derived from the [Ru(bpy)3]Cl2 sensitizer can be targeted transfer to the Ni(OH)2 active sites via the H2Ti6O13 nanosheets linker. A high CO production rate of 1801 μmol g-1 h-1 is obtained over the optimal Ni(OH)2/H2Ti6O13, while the pure H2Ti6O13 shows significantly lower CO2 reduction performance. The work is anticipated to trigger more research attention on the rational design and synthesis of earth-abundant transition metal-based cocatalysts decorated on ultrathin 2D platforms for artificially photocatalytic CO2 reduction. © 2021 Institute of Process Engineering, Chinese Academy of Sciences.
Keyword ：
CO2 reduction CO2 reduction Ni(OH)2 Ni(OH)2 Photosensitizer Photosensitizer Titanate nanosheet Titanate nanosheet
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| GB/T 7714 | Liao, W. , Lu, S. , Chen, W. et al. Rationally designed ultrathin Ni(OH)2/titanate nanosheet heterostructure for photocatalytic CO2 reduction [J]. | Green Chemical Engineering , 2022 , 3 (3) : 240-249 . |
| MLA | Liao, W. et al. "Rationally designed ultrathin Ni(OH)2/titanate nanosheet heterostructure for photocatalytic CO2 reduction" . | Green Chemical Engineering 3 . 3 (2022) : 240-249 . |
| APA | Liao, W. , Lu, S. , Chen, W. , Zhu, S. , Xia, Y. , Yang, M.-Q. et al. Rationally designed ultrathin Ni(OH)2/titanate nanosheet heterostructure for photocatalytic CO2 reduction . | Green Chemical Engineering , 2022 , 3 (3) , 240-249 . |
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The difficulty of adsorption and activation of CO2 at the catalytic site and rapid recombination of photogenerated charge carriers severely restrict the CO2 conversion efficiency. Here, we fabricate a novel alkaline Co(OH)(2)-decorated ultrathin 2D titanic acid nanosheet (H2Ti6O13) catalyst, which rationally couples the structural and functional merits of ultrathin 2D supports with catalytically active Co species. Alkaline Co(OH)(2) beneficially binds and activates CO2 molecules, while monolayer H2Ti6O13 acts as an electron relay that bridges a photosensitizer with Co(OH)(2) catalytic sites. As such, photoexcited charges can be efficiently channeled from light absorbers to activated CO2 molecules through the ultrathin hybrid Co(OH)(2)/H2Ti6O13 composite, thereby producing syngas (CO/H(2)mixture) from photoreduction of CO2. High evolution rates of 56.5 mu mol h(-1) for CO and 59.3 mu mol h(-1) for H-2 are achieved over optimal Co(OH)(2)/H2Ti6O13 by visible light illumination. In addition, the CO/H-2 ratio can be facilely tuned from 1:1 to 1:2.4 by changing the Co(OH)(2) content, thus presenting a feasible approach to controllably synthesize different H-2/CO mixtures for target applications.
Keyword ：
CO2 reduction CO2 reduction Co(OH)(2) decoration Co(OH)(2) decoration H2Ti6O13 nanosheets H2Ti6O13 nanosheets photocatalysis photocatalysis syngas production syngas production
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| GB/T 7714 | Liao, Wanru , Chen, Weihang , Lu, Suwei et al. Alkaline Co(OH)(2)-Decorated 2D Monolayer Titanic Acid Nanosheets for Enhanced Photocatalytic Syngas Production from CO2 [J]. | ACS APPLIED MATERIALS & INTERFACES , 2021 , 13 (32) : 38239-38247 . |
| MLA | Liao, Wanru et al. "Alkaline Co(OH)(2)-Decorated 2D Monolayer Titanic Acid Nanosheets for Enhanced Photocatalytic Syngas Production from CO2" . | ACS APPLIED MATERIALS & INTERFACES 13 . 32 (2021) : 38239-38247 . |
| APA | Liao, Wanru , Chen, Weihang , Lu, Suwei , Zhu, Shuying , Xia, Yuzhou , Qi, Lu et al. Alkaline Co(OH)(2)-Decorated 2D Monolayer Titanic Acid Nanosheets for Enhanced Photocatalytic Syngas Production from CO2 . | ACS APPLIED MATERIALS & INTERFACES , 2021 , 13 (32) , 38239-38247 . |
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Heterojunction structure of the composite photocatalyst with the intimate interface and sufficient contact areas is the key to achieve superior photogenerated charge carriers migration efficiency. However, it still remains a great challenge. Herein, a novel ZnIn2S4/HNb3O8 heterojunction with a strong Nb-S bond connected 2D/2D in-plane interface is successfully fabricated via a two-step synthesis method. Due to the similarity of the chemical property, S precursors for ZnIn2S4 are preferred trapped by the O defects on HNb3O8, which induce the formation of Nb-S bond in the 2D/2D interface under the hydrothermal process. The unique 2D/2D structure endows the heterojunction with large interfacial area and the Nb-S bond as high-speed channels facilitate the interfacial electrons transfer. Furthermore, Kelvin probe test demonstrates an interfacial electric field oriented from HNb3O8 to ZnIn2S4 is formed as driving force for the interface charge transfer. As a result, the photoexcited electrons may directionally migrate across the interface, thereby promoting the photocatalytic activity. The optimal H-2 evolution amount reaches 95.2 mmol g(-1), corresponding to 10.8 times of ZnIn2S4. The in-situ construction of chemical bonded heterojunction will provide a reference for designing high-efficiency heterojunction photocatalyst. (C) 2021 The Author(s). Published by Elsevier Ltd.
Keyword ：
2D/2D heterojunction 2D/2D heterojunction H-2 generation H-2 generation Interfacial engineering Interfacial engineering Photocatalysis Photocatalysis ZnIn2S4/HNb3O8 ZnIn2S4/HNb3O8
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| GB/T 7714 | Xia, Yuzhou , Zhu, Shuying , Liang, Ruowen et al. Interfacial reconstruction of 2D/2D ZnIn2S4/HNb3O8 through Nb-S bonds for efficient photocatalytic H-2 evolution performance [J]. | MATERIALS & DESIGN , 2021 , 209 . |
| MLA | Xia, Yuzhou et al. "Interfacial reconstruction of 2D/2D ZnIn2S4/HNb3O8 through Nb-S bonds for efficient photocatalytic H-2 evolution performance" . | MATERIALS & DESIGN 209 (2021) . |
| APA | Xia, Yuzhou , Zhu, Shuying , Liang, Ruowen , Huang, Renkun , Yan, Guiyang , Liang, Shijing . Interfacial reconstruction of 2D/2D ZnIn2S4/HNb3O8 through Nb-S bonds for efficient photocatalytic H-2 evolution performance . | MATERIALS & DESIGN , 2021 , 209 . |
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The design and synthesis of a Z-schematic photocatalytic heterostructure with an intimate interface is of great significance for the migration and separation of photogenerated charge carriers, but still remains a challenge. Here, we developed an efficient Z-scheme organic/inorganic g-C3N4/LDH heterojunction by in situ growing of inorganic CoAl-LDH firmly on organic g-C3N4 nanosheet (NS). Benefiting from the two-dimensional (2D) morphology and the surface exposed pyridine-like nitrogen atoms, the g-C3N4 NS offers efficient trap sits to capture transition metal ions. As such, CoAl-LDH NS can be tightly attached onto the g-C3N4 NS, forming a strong interaction between CoAl-LDH and g-C3N4 via nitrogen-metal bonds. Moreover, the 2D/2D interface provides a high-speed channel for the interfacial charge transfer. As a result, the prepared heterojunction composite exhibits a greatly improved photocatalytic H-2 evolution activity, as well as considerable stability. Under visible light irradiation of 4 h, the optimal H-2 evolution rate reaches 1952.9 mu mol g(-1), which is 8.4 times of the bare g-C3N4 NS. The in situ construction of organic/inorganic heterojunction with a chemical-bonded interface may provide guidance for the designing of high-performance heterostructure photocatalysts.
Keyword ：
chemically bonded interface chemically bonded interface g-C3N4/LDH g-C3N4/LDH heterojunction heterojunction Z-scheme Z-scheme
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| GB/T 7714 | Xia, Yuzhou , Liang, Ruowen , Yang, Min-Quan et al. Construction of Chemically Bonded Interface of Organic/Inorganic g-C3N4/LDH Heterojunction for Z-Schematic Photocatalytic H2 Generation [J]. | NANOMATERIALS , 2021 , 11 (10) . |
| MLA | Xia, Yuzhou et al. "Construction of Chemically Bonded Interface of Organic/Inorganic g-C3N4/LDH Heterojunction for Z-Schematic Photocatalytic H2 Generation" . | NANOMATERIALS 11 . 10 (2021) . |
| APA | Xia, Yuzhou , Liang, Ruowen , Yang, Min-Quan , Zhu, Shuying , Yan, Guiyang . Construction of Chemically Bonded Interface of Organic/Inorganic g-C3N4/LDH Heterojunction for Z-Schematic Photocatalytic H2 Generation . | NANOMATERIALS , 2021 , 11 (10) . |
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Ultrathin TiO2 nanosheet (NST) with abundant Ti3+ sites is developed as a photocatalyst which exhibits a high yield (147.2 mu mol g(-1) h(-1)) and selectivity (96.8%) for CO2 to CH4. The results of in situ FTIR, in situ EPR and density functional theory (DFT) calculation suggest that CO2 would be selectively activated on NST surface via forming the bridging Ti center dot center dot center dot CO2-center dot center dot center dot Ti coordination species which not only lowers the activation energy barrier, but also determines the selectivity of CH4. Additionally, NST with the better separation and transfer ability for photogenerated electrons-holes can fleetly supply the electrons to CO2 molecules for high efficiently producing CH4 via the Ti-C coordination bond. Finally, a possible mechanism of the synergistic effect about coordination-activation and photocatalysis is discussed at a molecule level. This work would offer a perspective for designing an effective photocatalyst and tailoring the selectivity of products by coordination activation.
Keyword ：
Coordination activation Coordination activation Methane Methane Photoreduction CO2 Photoreduction CO2 Ultrathin TiO2 nanosheet Ultrathin TiO2 nanosheet
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| GB/T 7714 | Wang, Zhi-Wen , Wan, Qiang , Shi, Ying-Zhang et al. Selective photocatalytic reduction CO2 to CH4 on ultrathin TiO2 nanosheet via coordination activation [J]. | APPLIED CATALYSIS B-ENVIRONMENTAL , 2021 , 288 . |
| MLA | Wang, Zhi-Wen et al. "Selective photocatalytic reduction CO2 to CH4 on ultrathin TiO2 nanosheet via coordination activation" . | APPLIED CATALYSIS B-ENVIRONMENTAL 288 (2021) . |
| APA | Wang, Zhi-Wen , Wan, Qiang , Shi, Ying-Zhang , Wang, Huan , Kang, Yue-Yue , Zhu, Shu-Ying et al. Selective photocatalytic reduction CO2 to CH4 on ultrathin TiO2 nanosheet via coordination activation . | APPLIED CATALYSIS B-ENVIRONMENTAL , 2021 , 288 . |
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