Materials Today Communications
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2024
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IF 3.7
Ligang Ma,Yuqing Yang,Tianyu Zhu,Yihuan Ding,Chao Lin,Le Xu,Xiaoqian Ai
In this paper, hexagonal ZnIn 2 S 4 nanoflowers were grown in situ on tetragonal WO 3 ·H 2 O nanosheets, yielding a compact ZnIn 2 S 4 @WO 3 ·H 2 O (ZIS@WO) core-shell heterojunction. The formation of the ZIS@WO heterojunction was optimized by meticulously adjusting the quantity of WO 3 ·H 2 O nanosheets incorporated. The crystal structure and microstructure of ZIS@WO were comprehensively examined using XRD, TEM and EDS analyses. The photocatalytic properties of ZIS@WO heterojunctions were evaluated through the degradation of organic pollutants under visible light irradiation. The results demonstrated a marked enhancement in photocatalytic efficiency for the ZIS@WO heterojunction. Further investigation into the separation and transport of photogenerated carriers were performed using PL spectroscopy and photoelectrochemical measurement. Compared to the individual components of ZnIn 2 S 4 nanoflowers and WO 3 ·H 2 O nanosheets, the ZIS@WO heterojunction creates an internal electric field at the interface, along with a compact core-shell configuration. This internal electric field, in conjunction with the band structure of the heterojunction, effectively accelerates the separation of photogenerated electrons and holes. Additionally, a comprehensive analysis of the photocatalytic degradation mechanisms were presented, elucidating the intricate processes.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
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IF 6.393
Bihong Zhang,Hao Wang,Jiajia Xi,Faqiong Zhao,Baizhao Zeng
A novel three-dimensional (3D) ZnIn 2 S 4 /WO 3 (ZIS/WO 3 ) photocatalyst is prepared via a simple hydrothermal method and used as photoanode material in constructing photoelectrochemical (PEC) immunosensor of prostate specific antigen (PSA). The photocatalyst presents high activity, and its photocurrent intensity is up to 23 and 7 times of WO 3 and ZnIn 2 S 4 (ZIS) respectively, under 430 nm light illumination. The improved PEC behavior is due to the sensitization and 3D structure of ZIS and the formation of Z-scheme heterojunction between ZIS and WO 3 , which greatly enhance light harvesting, promote the spatial separation of interfacial charges and prolong the lifetime of photogenerated electrons. At the same time, the high oxidation capacity of valence band holes of WO 3 is retained. A label-free PEC immunosensor is fabricated by using the photocatalyst, and it shows good performance for PSA detection. The linear response range is 0.01–500 ng/mL, and the detection limit is low to 5 pg/mL. Moreover, the PEC immunosensor afforded high stability, specificity and reproducibility. Therefore, it possesses great application potential in biological/clinical analysis.
研究领域:
材料科学
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分析化学
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生物医学工程
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纳米技术
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 6
·3298-3310
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IF 3.591
Zhi-Yu Liang,Ren-Kun Huang,Ruo-Wen Liang,Dan-Hua Xie,Gui-Yang Yan
Nowadays, visible-light-driven photocatalysts are considered to be prospective candidates for solving the crisis of energy shortage and environment pollution. Herein, with the support of WO3 nanorods (NRs), which possess a fast electron transmission and low carrier diffusion, a series of direct Z-scheme ZnIn2S4/WO3 photocatalysts are exquisitely fabricated by an in situ self-assembly route with ZnIn2S4 (ZIS) and WO3 NRs. Photocatalytic activities towards both selective hydrogenation of aromatic nitro compounds and non-selective oxidation of organic compounds demonstrate that these as-fabricated heterostructured nanocomposites exhibit remarkably enhanced photocatalytic activities owing to the highly efficient separation of photogenerated electrons and holes. Furthermore, the characteristics of electron spin resonance (ESR) spectra clearly suggest that the as-fabricated nanocomposites follow the direct Z-scheme-dominated photoredox catalytic mechanism. Additionally, combining the results of ESR and X-ray photoelectron spectroscopy (XPS), it can be concluded that the photo corrosion of ZnIn2S4 is significantly postponed after integration with WO3 NRs. Finally, we will be greatly pleased if this work could afford a theoretical exemplification and synthetic strategy for rationally designing and utilizing direct Z-scheme photocatalysts.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
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IF 3.5
Wang Shanshan,Zhang Kai,Taran Oxana P.,Li Siqi,Sun Fubao,Yan Hong,Li Fen
Lignin quantum carbon dots (CQDs) were prepared using basic lignin as the carbon source. They were loaded onto Z-type ZnIn 2 S 4 /WO 3 heterojunction semiconductor materials by a one-step hydrothermal method to construct a ternary composite photocatalyst. Taking the photocatalytic water hydrogen evolution reaction performance as an indicator, it was found that the 33% CQDs/ZnIn 2 S 4 /WO 3 composite photocatalyst exhibited the highest hydrogen evolution reaction rate of 15.355 mmol·h −1 ·g −1 , which was twice as high as that of ZnIn 2 S 4 /WO 3 (7.522 mmol·h −1 ·g −1 ). This study successfully constructed CQDs/ZnIn 2 S 4 /WO 3 tenary heterojunction photocatalyst with excellent and stable hydrogen production performance, which fully demonstrated the feasibility of loading lignin-based CQDs to enhance the photocatalytic performance of ZnIn 2 S 4 for high-value utilization of lignin.
研究领域:
材料科学
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光催化
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可再生能源
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纳米材料
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可持续化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Shuaimei Li,Wenlei Zhang,Congwei Wang,Gang Li
Ethylene glycol (EG) is extensively utilized as anti-freezer and deicer, which would bring potential health risk under unintentional exposures especially with hazardous inhalation of EG aerosols or vapors. In this study, ZnIn 2 S 4 (ZIS)/WO 3 core-shell nanofibrous heterostructure loaded with optimized Au nanoparticles (NPs) was prepared for superiorly sensitive and selective EG gas sensing. The ternary Au/ZIS/WO 3 heterostructures exhibited an excellent response ( Ra/Rg =98.92) to 50 ppm EG, demonstrating an enhancement of 3.5 times compared to the binary ZIS/WO 3 , and a substantial improvement of 59.5 and 24.1 times compared to pure WO 3 and ZIS, respectively. The ternary Au/ZIS/WO 3 heterostructures also possessed an extremely low detection limit of 6 ppb, as well as excellent selectivity , repeatability, and long-term stability. This exceptional gas sensing performance can be attributed to its distinctive ternary Au/ZIS/WO 3 heterostructures with high specific surface areas . This unique structure not only facilitate the activation of abundant active oxygen species, but also promote the spillover effect of Au and enhance effective electronic distribution, thereby providing more EG adsorption sites, which was confirmed by density functional theory calculation. The synergistic effect arising from the metal-semiconductor interface and the core-shell heterostructure presents a novel avenue for advancing high-performance sensor technologies.
研究领域:
材料科学
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化学传感器
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产品关联
DOI
高影响因子
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