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SSRN 2024年

作者： Zeng, Danni Shen, Tingzhe Hu, Yadong Zhang, Zhenyu Liu, Ze Xu, Ning Song, Jun Guan, Rongfeng Zhou, Changjian Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Jiangsu China School of Chemistry and Chemical Engineering Yancheng Institute of Technology Jiangsu China School of Mechanical Engineering Yancheng Institute of Technology Jiangsu China

To alleviate the environmental pollution and energy crisis caused by the excessive use of fossil fuels, photocatalytic water splitting to produce hydrogen is an important way to solve energy and environmental problems. Here, Nitrogen-doped ZnIn2S4 (N-ZIS) composite tungsten-based polyoxometalate (TPA) composites (denoted as N-ZIS/TPA) were synthesized by a one-step solvothermal method. The introduction of N3- instead of S2- in ZIS changes the internal electron arrangement of ZIS, improves the electronegativity of ZIS, and is conducive to the surface adsorption of positively charged H*. At the same time, the impurity energy level is generated at the valence band position, which narrows the band gap and broadens the light absorption range, thereby promoting photocatalytic hydrogen production. After compounding, due to the adjustable redox properties of TPA itself, the internal W6+ part is reduced to W6+, resulting in the coexistence of W6+ and W4+ in the composite material, which fully verifies the flow of interface electrons from N-ZIS to TPA. The close contact between N-ZIS and TPA and the built-in electric field's driving force help achieve efficient interfacial charge transfer. At the same time, W6+/W4+ redox pairs were introduced to accelerate the separation of photogenerated electrons and holes. The photocatalytic hydrogen production rate of the best sample 1N-ZIS/TPA-15 is as high as 17345.53 μmol·g-1·h-1, which is 2.92 times that of N-ZIS (5940.08 μmolg-1·h-1) and 8.03 times that of ZIS (2159.22 μmol·g-1·h-1)). This study explores the design and construction of efficient s-type heterojunctions by adjusting the energy band position of ZnIn2S4 as a new strategy in the field of photocatalytic hydrogen production. © 2024, The Authors. All rights reserved.

关键词： Nitrogen

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S-Scheme Bi/Bi2wo6/Tio2 Nanofiber Photocatalyst for Efficient Degradation of Sulfamethoxazole

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SSRN 2024年

作者： Shen, Tingzhe Zeng, Danni Liu, Ze Hu, Yadong Tian, Yaxi Song, Jun Yang, Tao Guan, Rongfeng Zhou, Changjian Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Jiangsu China School of Chemistry and Chemical Engineering Yancheng Institute of Technology Jiangsu China Students' affairs Division Yancheng Institute of Technology China

Improving the efficiency of photogenerated carrier separation by designing heterojunction photocatalysts remains an important challenge. In this study, TiO2 nanofibers were prepared by electrospinning, Bi/Bi2WO6/TiO2 heterojunctions were constructed by hydrothermal method, and verified by characterization techniques. The heterojunction had good photodegradation activity to sulfamethoxazole (SMX) under ultraviolet and visible light irradiation (96.4% within 60 min). The enhanced photodegradation activity of Bi/Bi2WO6/TiO2 nanocomposites can be attributed to the synergistic effect of S-cheme mechanism and Bi metal plasma action. In addition, Bi metals can generate a large number of electron-hole pairs under the action of surface plasmon resonance (SPR). In addition, the influence factors such as pH, SMX concentration and catalyst loading were studied. According to the detected intermediates, the photocatalytic degradation pathway of SMX was studied. The results of free radical capture experiment and ESR show that ·O2- and h+ free radicals play an important role in the decomposition of SMX. The cyclic experiments show that Bi/Bi2WO6/TiO2 nanocomposites have excellent stability and reuse characteristics. Finally, the mechanism of photocatalytic degradation of SMX was described. This study provides a promising perspective for the preparation and development of S-Scheme heterojunction photocatalysts based on Bi2WO6. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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A Pts Qds/Znin2s4 Heterojunction Catalyst for Efficient Photocatalytic Hydrogen Production and Reduction of P-Nitrophenol

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SSRN 2022年

作者： Liu, Fengjiao Gao, Yan Chi, Xianhu Zhu, Zhangqing Wang, Xinlin Guan, Rongfeng Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Jiangsu China

The ternary sulfide ZnIn 2 S 4 (ZIS) can effectively solve the problems of energy shortage and environmental pollution due to its appropriate band gap and excellent visible light absorption. However, ZIS still has the disadvantages of low separation efficiency and fast recombination, which limit its practical application. Therefore, in order to improve its photocatalytic performance, PtS QDs/ZIS composites were prepared by photodeposition of PtS quantum dots (PtS QDs) on ZIS in this study, and excellent photocatalytic hydrogen evolution rates (20777.07 µmol‧g -1 ‧h -1 ) were obtained, which were 2.4 and 148.4 times higher than those of ZIS-Pt and ZIS, respectively, and the quantum efficiency was 13.25% at 430 nm. Secondly, PtS QDs/ZIS also showed efficient reduction performance and good stability in the catalytic reduction of p-nitrophenol (4-NP), reaching 99.87% at 7 min. One-step photodeposition of PtS QDs provides a new idea for photocatalytic hydrogen production from water splitting and catalytic reduction of pollutants. © 2022, The Authors. All rights reserved.

关键词： Sulfur compounds

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A Mesoporous Nanofibrous Bivo4-Ni/Agvo3 Z-Scheme Heterojunction Photocatalyst Enhanced Photocatalytic Reduction of Cr6+ and Degradation of Rhb Under Visible Light

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SSRN 2022年

作者： Gao, Yan Liu, Fengjiao Chi, Xianhu Tian, Yaxi Zhu, Zhangqing Guan, Rongfeng Song, Jun Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Jiangsu China

BiVO4 photocatalyst is one of the effective means to solve environmental pollution. However, the low specific surface area and short photogenerated carrier lifetime of a single BiVO4 seriously restrict its development and practical application. In this study, BiVO4 nanofibers were modified by the combination strategy of doping and semiconductor recombination to enhance their photocatalytic activity. The fibers prepared by electrospinning were subjected to heat treatment to remove organic matter, so as to prepare mesoporous Ni-doped BiVO4 nanofibers. Furthermore, the mesoporous fibrous Z-scheme heterojunction photocatalyst BiVO4-Ni/AgVO3 was successfully fabricated by hydrothermal method. The synergistic effect of mesoporous structure, Ni doping and AgVO3 enabled the catalyst BiVO4-Ni/AgVO3 to obtain an excellent photocatalytic reduction of Cr6+ and degradation of RhB. The photocatalytic reduction efficiency of Cr6+ reached 99.7% at 80 min, and the degradation efficiency of RhB reached 98.6% at 30 min. The successful preparation of Z-scheme heterojunction photocatalyst BiVO4-Ni-1/AgVO3-25 has essential application prospects in photocatalytic degradation of pollutants and reduction and purification of metal ions. © 2022, The Authors. All rights reserved.

关键词： Vanadium compounds

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Flexible, scalable, and bifunctional MOF-based nanofibrous membranes with gems-on-string structure for simultaneous efficient water evaporation and pollution remediation

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Chemical Engineering Journal 2025年 514卷

作者： Ge, Song Song, Jun Zhang, Jichao Yang, Xiu-Li Xie, Ming-Hua Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Yancheng224051 China College of Textile and Clothing Yancheng Institute of Technology Yancheng224051 China Jiangsu Engineering Research Center for Digital Textile Inkjet Printing Key Laboratory of Eco-Textile Jiangnan University Ministry of Education Wuxi214122 China

Solar-driven interfacial evaporation offers a viable pathway for alleviating global water shortages. However, a significant challenge arises when the source water contains organic contaminants, as the evaporation process can lead to the enrichment and exacerbation of pollution in the remaining water. Herein, we constructed a flexible bifunctional nanofibrous membrane evaporator featuring a gems-on-string structure, designed to concurrently realize clean water production and source water purification. This was achieved through the uniform decoration of polypyrrole (PPy) nanoparticles onto silica nanofibers, followed by the tactful immobilization of zeolitic imidazolate framework (ZIF-67) polyhedrons on the fibers via a facile hot-pressing approach. The micro-nano hierarchical structure of the gems-on-string fibers enables multiple reflections between adjacent gems, significantly enhancing full-spectrum light absorption (96.3 %) and photothermal conversion. Moreover, the superhydrophilic and hierarchically interconnected channels within the membrane facilitate water transport and evaporation enthalpy diminution. Furthermore, the synergistic effects of localized heat from PPy, and photocatalysis and cobalt sites from ZIF-67 significantly promote the activation of peroxymonosulfate. As a result, the bifunctional evaporator achieves a rapid evaporation rate (2.29 kg m-2h−1) with a remarkable solar-water conversion efficiency (93.2 %) under one sun, outperforming most state-of-art evaporators, while maintaining superior oxytetracycline removal (92.5 %). Significantly, the evaporator delivers a daily freshwater output (5.3 kg m−2) when treating complex wastewater/seawater. This study not only presents an efficient strategy for fabricating flexible high-performance photothermal-catalytic membranes, but also provides a sustainable platform for freshwater production and sewage purification. © 2025 Elsevier B.V.

关键词： River pollution

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Evolution of the Stoichiometry of Cxshy and its Bonding Behavior During Co2 Sequestration of Γ-C2s

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SSRN 2023年

作者： Xu, Qingyuan Huo, Zhen Sun, Jinfeng Lu, Bao Jiang, Ruiyu Zhang, Zhonglun Hou, Guihua Shi, Caijun Key Laboratory for Advanced Technology in Environment Protection of Jiangsu Province Yancheng Institute of Technology Jiangsu Yancheng224051 China China National Building Material Group Technology Innovation Academy Zaozhuang277100 China Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province College of Civil Engineering Hunan University Changsha410082 China

This paper reports the stoichiometric evolution of the carbonation product xCaO-SiO2-yH2O (CxSHy) produced by carbonation of γ-dicalcium silicate (γ-C2S) and the bonding behavior between CxSHy with calcium carbonate (CC) - another carbonation product of γ-C2S. The x and y in CxSHy were determined with three methods, that is, backscattered electron-energy dispersive spectroscopy (BSE-EDS), thermogravimetric (TG) tests combined with quantitative X-ray diffraction (QXRD), and transmission electron microscopy-energy dispersive spectroscopy (TEM-EDS), respectively. The results showed that the ranges of x and y in CxSHy were 0.13-0.24and 0.09-0.17, respectively after carbonation for 48 h. After 96 h, the x is nearly 0. The collapse of the local CC shell layer was observed by SEM, and analyses of fractures formed in tensile testing showed cracks at the junctions of CxSHy with CC. This result indicates that the interface of their two phases is the weak part of the block material. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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Interface Coupling Photocatalysts Ni-NiO@CNFs/ZnIn2S4-Vs for Efficient Photothermal Synergistic Catalytic Hydrogen Evolution

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SSRN 2024年

作者： Zeng, Danni Shen, Tingzhe Hu, Yadong Liu, Fengjiao Liu, Ze Song, Jun Guan, Rongfeng Zhou, Changjian Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Jiangsu China School of Chemistry and Chemical Engineering Yancheng Institute of Technology Jiangsu China School of Materials Science and Engineering Henan Polytechnic University Jiaozuo China

Photothermal synergistic catalysis is a new type of energy conversion technology. In this study, ZnIn2S4 with S-vacancy (Vs) is coupled with Ni-NiO@CNFs to form an interface coupling photocatalysts with double schottky barrier, double channel and mixed photothermal conversion effect. Theoretical calculation confirms that ΔG*H=-0.07 eV of the sample is close to 0, which promotes H* adsorption and accelerates the formation of H2. The internal photothermal catalysis is achieved by visible-near infrared (Vis-NIR, RT) irradiation. The internal photothermal catalytic hydrogen production rate of the best sample (0.9Ni-NiO@CNFs/ZIS-Vs) is as high as 17.24 mmol·g−1·h−1, and its photothermal conversion efficiency (η) is as high as 61.42%. Its hydrogen production efficiency is 20.33 times that of ZIS-Vs (0.848 mmol·g-1·h-1) under visible light (Vis, RT) conditions. When the Vis-NIR light source is combined with external heating (75 ℃), the hydrogen production efficiency is further improved, and the hydrogen production efficiency (29.20 mmol·g-1·h-1) is 28.91 times that of ZIS-Vs (1.09 mmol·g-1·h-1, Vis-NIR, RT). Further analysis showed that the increase in hydrogen production resulted from the apparent activation energy (Ea) of the catalyst decreasing from 16.7 kJ·mol-1 to 9.28 kJ·mol-1. This study provides a valuable prototype for the design of efficient photothermal synergistic catalytic system. © 2024, The Authors. All rights reserved.

关键词： Hydrogen production

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Interface coupling photocatalysts Ni-NiO@CNFs/ZnIn2S4-Vs for efficient photothermal synergistic catalytic hydrogen evolution

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SSRN 2024年

关键词： Hydrogen production

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One-step Condensation/copolymerization of VTES and DVB for Self-assembly Bionic Superhydrophobic Surface Coating and Study on Oil-water Separation

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Journal of Bionic Engineering 2021年第3期18卷 559-573页

作者： Ruilong Zhang Zhiping Zhou Yi Wang Xiaohui Dai Li Chen Jiangdong Dai Research School of Polymeric Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 2120133China State Key Laboratory of NBC Protection for Civilian Beijing 102205China Institute of Green Chemistry and Chemical Technology Advanced Chemical Engineering Laboratory of Green Materials and Energy of Jiangsu ProvinceSchool of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China

Mimicry of nature drives the development of bionic *** superhydrophobic materials are a kind of high-efficiency materials to handle oil spills and water ***,the stability of surface coatings of the superhydrophobic materials remains a ***,a new category of self-assembly bionic superhydrophobic surface coating was prepared via one-step condensation/copolymerization of vinyltriethoxysilane(VTES)and divinylbenzene(DVB),which realized the close combination of covalent bonds between organic(***)and inorganic matter(***),and avoided the swelling of polydivinylbenzene(PDVB)in the process of collection of oil from *** organic-inorganic hybrid polymer could self-assembly deposit on the surface of sponge even other *** example,P(VTES-DVB)-Si0_(2)/MS obtained by assembling P(VTES-DVB)-Si0_(2)on the surface of Melamine Sponge(MS)exhibited superhydrophobicity with a Water Contact Angle(WCA)of 157.3,the optimal adsorption capacity of 77 g g 136 g g-1 for diverse oils,and an excellent separation efficiency of 99.3%.Besides,the excellent acid and alkali resistance of P(VTES-DVB)-Si0_(2)/MS suggested the potential value in practical oil-water separation.P(VTES-DVB)-Si0_(2)showed the outstanding hydrophobic performance by using as coating on different *** work provided a new idea about the stable combination of organic and inorganic matter in the surface modification.

关键词： superhydrophobic surface coating oil-water separation condensation copolymerization self-assembly organic-inorganic hybridism

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Flower-Like S-Vacancy Znin2s4 is Combined with Ni-Nio@Cnfs Form a Dual-Channel Material with Schottky Barrier for Efficient Photothermal Synergistic Catalytic Hydrogen Production

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SSRN 2023年

作者： Zeng, Danni Shen, Tingzhe Hu, Yadong Liu, Fengjiao Guan, Rongfeng Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Jiangsu China School of Materials Science and Engineering Henan Polytechnic University Jiaozuo China

As a new type of energy conversion technology, photothermal synergistic catalysis entirely uses the synergistic effect of light and heat energy to achieve efficient energy conversion. In this study, ZnIn2S4 containing S-vacancy was coupled with Ni-NiO@CNFs to form a thermally assisted photocatalysis (TAPC) material with double Schottky barrier, dual-channel, and mixed photothermal conversion effects, and a local heating system was established. The photocatalytic reaction is carried out in a double-layer quartz photocatalytic reactor using a constant temperature heating circulating water device to achieve the purpose of global heating. By combining the advantages of global/local heating, the light effect of high-frequency photons, the thermal effect of low-frequency photons, and the heating of the entire reaction system are used to achieve high solar energy utilization efficiency. Under the condition of external heating at 45°C, the hydrogen production rate of the best sample (0.9-Ni@C/ZIS-Vs) is as high as 25.50mmol·g-1·h-1, which is 19.02 times that of bulk ZnIn2S4 (1.34mmol·g-1·h-1). In addition, DFT confirmed that Ni-NiO@CNFs can reduce ΔG*H to -0.07eV by Ni-NiO@CNFs, which promotes H* adsorption, which is also conducive to the formation of H2. Therefore, this study promotes the sustainable development of hydrogen energy and provides a valuable prototype for the design of efficient photothermal synergistic catalytic systems in the future. © 2023, The Authors. All rights reserved.

关键词： Nickel oxide

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