JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
·
IF 10.319
Meng Dai,Zuoli He,Peng Zhang,Xin Li,Shuguang Wang
The recombination of photogenerated electrons and holes is a crucial factor limiting photocatalytic H 2 evolution. The S-scheme ZnWO 4 -ZnIn 2 S 4 heterojunction with 2D coupling interfaces was successfully synthesized using a simple solvothermal method. An effective S-scheme interfacial charge migration route at the S-scheme heterogeneous interface was determined by energy band structure analyses (such as UPS, Mott-Schottky and XPS plots), which facilitates the separation of photoexcited carriers. It is worth noting that the optimal ZnWO 4 -ZnIn 2 S 4 composite has an H 2 evolution activity of 4925.3 μmol g −1 h −1 with favourable photostability and stability. Meanwhile, the ZnWO 4 -ZnIn 2 S 4 heterojunction exhibits the maximum optical response value (2.8 mA cm −2 ) in the initial stage, effectively promoting the separation and migration of photogenerated carriers. The establishment of the built-in electric field direction at the interface can effectively promote the space charge separation between the ZnWO 4 and ZnIn 2 S 4 nanosheets, which is favorable to the photocatalytic H 2 evolution. This work provides valuable guidance for designing S-scheme heterojunction photocatalysts composed of two n-type semiconductors for energy and environmental applications.
研究领域:
材料科学
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能源与环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiang He,Zhongqing Yang,Ziqi Wang,Linlin Gu,Jiaqi Qiu,Jingyu Ran
The rapid recombination of photogenerated electron-hole pairs and the slow electron transfer rate at the catalyst-solution interface seriously limit hydrogen production from α-cellulose photoreforming. Herein, a sulfur-vacancy-enriched ZnIn 2 S 4 (S VH -ZIS) photocatalyst was prepared, and Pt nanoclusters were grown on its surface by in situ photodeposition. Sulfur vacancies coupling Pt nanoclusters optimize the electron transport channel and realize efficient electron migration from α-cellulose to H + through the photocatalyst. The construction of sulfur vacancies promoted the formation of ·OH and enhanced the adsorption and activation of glucose, which significantly improved the oxidation of α-cellulose and accelerated the oxidation kinetics of α-cellulose. Meanwhile, the sulfur vacancies promote the separation efficiency of photogenerated electron-hole pairs and broaden the absorption wavelength range of light. Pt clusters provide hydrogen evolution reaction sites and achieve spatial separation of oxidation and reduction reaction sites. As a result, the hydrogen yield of α-cellulose photoreforming catalyzed by 0.25 % Pt/S VH -ZIS reached 522.76 μmol/g/h, which was 6.02 times that of 0.25 % Pt/S VL -ZIS (sulfur-vacancy-poor ZIS) and significantly higher than that of most previously reported photocatalysts.
研究领域:
能源科学
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材料科学
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产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
·
IF 4.6
Yunlan Xu,Jiaxin Mou,Lin Dong,Qingmei Qiao,Dengjie Zhong
The performance of photocatalytic fuel cell (PFC) depends on photoanode, which is the key to generate photoexcited carriers and degrade organic wastes. In this study, ZnIn 2 S 4 nano-bandgap semiconductor and polypyrrole were used to modify TiO 2 to prepare polypyrrole/ZnIn 2 S 4 /TiO 2 /Ti photoanode to increase its photo-response range and the separation of photoexcited carriers. The PFC with polypyrrole/ZnIn 2 S 4 /TiO 2 /Ti photoanode and copper cathode was built to degrade RhB and generate electricity. The RhB removal rate, open-circuit voltage, short-circuit current density, and maximum power density of the photocatalytic fuel cell were 94.6 % (1 h), 0.47 V, 0.23 mA cm −2 and 21.11 μW cm −2 , respectively. The improvement of PFC performance is attributed to the good visible-light responsive properties of polypyrrole/ZnIn 2 S 4 .The presence of polypyrrole acts as both an electron donor and a hole acceptor, which provides an ideal pathway for the separation and transmission of photogenerated carriers. The synergistic effect of polypyrrole, ZnIn 2 S 4 and TiO 2 eventually increases the photocatalytic ability of the PFC. This research can offer reference for the study of TiO 2 -based efficient visible light responsive PFC.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
·
IF 4.7
Suping Zhang,Shuang Zhou,Qianchen Ou,Likang Zhou,Qiaoyi Xiao,Yuan Lian,Liping Guo,Hongmei Wang
Ru-doped ZnIn 2 S 4 (Ru-ZnIn 2 S 4 ) nanostructures were prepared by doping different amounts of Ru into ZnIn 2 S 4 through a one-step hydrothermal method. The structure, morphology, band structure, light absorption and photoelectrochemical properties of as-prepared samples were characterized by a series of characterization methods such as XRD, TEM, SEM, UV–vis DRS, PL and TRPL. These results show that doping Ru into ZnIn 2 S 4 effectively improves the separation and transfer efficiency of photogenerated electrons and holes. When the addition amount of RuCl 3 is 30 µmol, the photocatalytic hydrogen production performance reaches its optimum, achieving a hydrogen production rate of 5974.7 μmol·g −1 ·h −1 , which is 15.9 times greater than that of pure ZnIn 2 S 4 . In the experiment of hydrogen production coupled with tetracycline (TC) degradation, the degradation rate of TC for 0.03Ru-ZnIn 2 S 4 reaches 70.2 %, and the hydrogen production rate reaches up to 202.8 μmol·g −1 ·h −1 , effectively achieving the hydrogen energy conversion and degradation of TC. This study presents a novel strategy for the treatment of wastewater by photocatalysis and realization of energy recovery as well as wastewater treatment.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2017
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IF 2.625
Bo Gao,Weiping Chen,Shaonan Dong,Jiadong Liu,Tingting Liu,Lei Wang,Mika Sillanpää
Functional PPy-ZnIn 2 S 4 composite was prepared via facile hydrothermal method in the presence of PPy powder. The X-ray diffraction (XRD) pattern showed single hexagonal phase in pure ZnIn 2 S 4 and mixed phases of hexagonal and cubic in PPy-ZnIn 2 S 4 composite. The coexistence of hexagonal and cubic phase in PPy-ZnIn 2 S 4 composite can be advantageous to charge separation. The absorbance within visible light range was enhanced by PPy-ZnIn 2 S 4 composite compared with pure ZnIn 2 S 4 . The time required for complete removal of chloramphenicol by PPy-ZnIn 2 S 4 composite (60 min) was shorter than pure ZnIn 2 S 4 (120 min), indicating better deep degradation. 48.5% TOC was achieved by PPy-ZnIn 2 S 4 after 3 h photocatalytic degradation, which was two times higher than ZnIn 2 S 4 (23.5%).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2023
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IF 16.5
You Wu,Yi Yang,Miaoli Gu,Chuanbiao Bie,Haiyan Tan,Bei Cheng,Jingsan Xu
Solar photocatalysis is a promising, green, and sustainable technique for the synthesis of H 2 O 2 . In this study, low-dimensional ZnO/ZnIn 2 S 4 S-scheme heterojunction photocatalysts are fabricated using electrostatic spinning and chemical bath deposition methods for the efficient photocatalytic production of H 2 O 2 . ZnO nanofibers loaded with 20 wt% ZnIn 2 S 4 exhibit a superior H 2 O 2 production rate of 928 μmol g −1 h −1 , which is more than four times higher than that seen in pristine hexagonal phase ZnO and ZnIn 2 S 4 . First-principles calculations and in-situ X-ray photoelectron spectroscopy reveal the charge separation and transfer mechanisms in the S-scheme heterojunction. The construction of the S-scheme heterojunction facilitates the spatial separation of charge carriers, and electrons and holes with higher redox abilities are retained. Photoelectrochemical and photoluminescence tests further show that the formation of an S-scheme heterojunction is beneficial for the separation of photoinduced charge carriers. Electrochemical tests and electron paramagnetic resonance measurements indicate that H 2 O 2 production is primarily via a two-step single-electron O 2 reduction path. This study provides a new approach for the construction of S-scheme heterojunction materials that can efficiently produce H 2 O 2 under solar irradiation.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
高影响因子
Catalysts
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2025
·Vol. 15
·期 1
·95
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IF 4
Jinghong Fang,Min Wang,Xiaotong Yang,Qiong Sun,Liyan Yu
In this study, a novel Z-scheme heterojunction photocatalyst was developed by integrating g-C3N4nanoplates into ZnIn2S4microspheres. X-ray photoelectron spectroscopy analysis revealed a directional electron transfer from g-C3N4to ZnIn2S4upon heterojunction formation. Under irradiation, electrochemical tests and electron paramagnetic resonance spectroscopy demonstrated significantly enhanced charge generation and separation efficiencies in the ZnIn2S4/g-C3N4composite, accompanied by reduced charge transfer resistance. In photocatalytic CO2reduction, the ZnIn2S4/g-C3N4composite achieved the highest CO yield, 1.92 and 5.83 times higher than those of pristine g-C3N4and ZnIn2S4, respectively, with a notable CO selectivity of 91.3% compared to H2(8.7%). The Z-scheme heterojunction mechanism, confirmed in this work, effectively preserved the strong redox capabilities of the photoinduced charge carriers, leading to superior photocatalytic performance and excellent long-term stability. This study offers valuable insights into the design and development of g-C3N4-based heterojunctions for efficient solar-driven CO2reduction.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Gege He,Junsheng Wang,Xiaozhen Lv,Shun Lu
Hydrogen is increasingly acknowledged as a viable alternative to traditional fossil fuels. However, the photothermal properties of CoFe 2 S 4 , a photocatalyst displaying metal-like behavior, have not been adequately explored in the context of photocatalytic H 2 generation. To improve photocatalytic hydrogen evolution, it is crucial to understand how to expedite the transfer of photogenerated electrons and the dissociation of H-OH bonds for enhanced hydrogen ion release. Herein, a type-II heterostructure was constructed between CoFe 2 S 4 nanosheets and ZnIn 2 S 4 nanoparticles, a non-precious metal photocatalyst, which effectively separates photogenerated carriers and holes. More importantly, the photothermal effect and localized surface plasmon resonance (LSPR) effects induced by CoFe 2 S 4 improved the sluggish kinetics of water dissociation. The CoFe 2 S 4 /ZnIn 2 S 4 -5 photocatalyst achieved H 2 evolution rate of 6.84 mmol·g −1 ·h −1 , and an apparent quantum efficiency of 15.6 % at 400 nm, significantly enhancing the efficiency of photocatalytic splitting for hydrogen production. This work advances the application of metal CoFe 2 S 4 in solar-to-fuel conversion and offers valuable insights for designing semiconductor-based photothermally assisted photocatalytic systems.
研究领域:
材料科学
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能源科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Tingyuan Zhang,Lingxiao Song,Jiahui Yang,Jiajia Wang,Dong Feng,Baojun Ma
Heteroatom doping is a promising strategy for optimizing the photocatalytic activity of semiconductors. However, relying solely on single-element doping often poses challenges in modulating the capabilities of semiconductors. Herein, we adopt a strategy of simultaneously modifying ZnIn 2 S 4 with the double non-metallic elements nitrogen (N) and oxygen (O) to form (N, O)-ZnIn 2 S 4 . Interestingly, (N, O)-ZnIn 2 S 4 exhibits significantly higher hydrophilicity and specific surface area compared to pristine ZnIn 2 S 4 . The contact angle decreases from 24° to 21°, while the specific surface area increases from 56 m 2 /g to 75 m 2 /g. The hydrogen production rate of (N, O)-ZnIn 2 S 4 reaches 400 μmol/h/g, which is 2.52 times higher than that of pristine ZnIn 2 S 4 . Photoelectrochemical characterization reveals that (N, O)-ZnIn 2 S 4 has a lower overpotential, higher photocurrent, lower resistance, reduced fluorescence intensity, and shorter fluorescence lifetime. Additionally, co-catalyst loading boosts the hydrogen production activity of ZnCo 2 S 4 /(N, O)-ZnIn 2 S 4 from 548 μmol/h/g to 810 μmol/h/g, compared to ZnCo 2 S 4 /ZnIn 2 S 4 . This study presents a dual non-metallic modification strategy to enhance semiconductor properties, achieving superior performance in photocatalytic hydrogen production.
研究领域:
材料科学
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能源科学
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DOI
PubMed
高影响因子
Catalysts
·
2022
·Vol. 12
·期 4
·400
·
IF 4.501
Sujuan Hu,Li Jin,Wangyu Si,Baoling Wang,Mingshan Zhu
Vacancies engineering based on semiconductors is an effective method to enhance photoelectrochemical activity. Herein, we used a facile one-step solvothermal method to prepare sulfur vacancies modified ultrathin two-dimensional (2D) ZnIn2S4nanosheets. The photon-to-current efficiency of sulfur vacancies modified ultrathin 2D ZnIn2S4nanosheets is 1.82-fold than ZnIn2S4nanosheets without sulfur vacancies and 2.04-fold than multilayer ZnIn2S4. The better performances can be attributed to the introduced sulfur vacancies in ZnIn2S4, which influence the electronic structure of ZnIn2S4to absorb more visible light and act as the electrons trapping sites to suppress the recombination of photo-generated carriers. These results provide a new route to designing efficient photocatalyst by introducing sulfur vacancies.Keywords:ZnIn2S4nanosheets;sulfur vacancies;vacancies engineering;photoelectrocatalysts;photoelectrochemical performance
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 19
·4496-4506
·
IF 5
Jifang Zhang,Jinde Sun,Chengcheng Suo,Wei Li,Sha Luo,Bing Tian,Chunhui Ma,Shouxin Liu
The low efficiency of photogenerated charge transfer to generate reactive oxygen species is the main factor that limits the photocatalytic activity of ZnIn2S4 (ZIS)-based materials in lignin depolymerization. In this work, we prepared an efficient ZIS catalyst with a hexagonal crystal structure and three-dimensional flower-like micromorphology by a solvothermal method. The ZIS catalyst possessed abundant active sites and efficient light-harvesting ability. Sulfur vacancies (Sv) were introduced into the ZIS photocatalyst (ZIS-Sv) to enhance its electron-withdrawing ability and promote the separation and transfer of photogenerated charges. Using the ZIS-Sv photocatalyst, the conversion rate of Cα–Cβ bonds in the β-O-4 dimer reached 96.31% and the molar yields (selectivity) of phenol and acetophenone were 695.17 μmol g−1 h−1 (85.14%) and 610.66 μmol g−1 h−1 (74.73%), respectively (with a ZIS-Sv0.6 concentration of 1 mg ml−1, irradiation time of 6 h, ethanol content of 90%, pH of 5, and 2-phenoxyacetophenone concentration of 1 mg ml−1). The photocatalytic depolymerization of dioxane lignin by the ZIS-Sv photocatalyst reached an efficiency of 80.42%. Catalyst characterization results and mechanism studies indicated that Sv promoted effective electron adsorption to generate oxygen radicals ˙OH and ˙O2− through O2 single-electron reduction and H2O decomposition, respectively. Then, the oxygen radicals combined with C-centered radicals to form unstable intermediates, further breaking lignin linkages, which finally formed an efficient indirect oxidation process. It is expected that introducing Sv into ZIS materials is a useful strategy to obtain photocatalysts for Cα–Cβ cleavage to realize efficient photocatalytic lignin depolymerization.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rui Li,Shuangjun Li,Luyang Zuo,Xiangping Xiao,Huitao Fan,Bo Li,Liya Wang
The spatial segmentation of photogenerated carriers is crucial for achieving efficient photocatalytic H 2 production (PHP) rates in photocatalyst. Design studies of crystalline catalyst facets and selective morphology control can facilitate the development of catalysts that expose more advantageous active facets. Herein, Cu 2 WS 4 /ZnIn 2 S 4 composites are constructed by growing ZnIn 2 S 4 nanosheets in situ on Cu 2 WS 4 with largely exposed {0 0 1} surface. Experiments and density functional theory calculations demonstrate that the electrons of ZnIn 2 S 4 flowed to the {0 0 1} surface of Cu 2 WS 4 , and the holes vectorially migrated to the {1 0 1} surface, during the reaction process, resulting in efficient spatial separation of the photogenerated carriers. The Cu 2 WS 4 /ZnIn 2 S 4 achieves a PHP rate of 23.67 mmol g −1 h −1 , 13.44-fold increase compared with pure ZnIn 2 S 4 . This report combines the advantages of the high-energy activity of the Cu 2 WS 4 {0 0 1} surface to morphologically control the ratio of the {0 0 1}/{1 0 1} surfaces so that ZnIn 2 S 4 can contact a larger area of the {0 0 1} surface. Furthermore, under the influence of crystallographic effects on the {0 0 1} and {1 0 1} surfaces, electrons and holes of ZnIn 2 S 4 are transferred to different crystalline facets, promoting the redox reaction. This paper provides effective ideas for the rational design of photocatalysts with efficient carrier space separation.
研究领域:
材料科学
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催化化学
·
能源科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）