Citation: Zhao Jingjing, Zhang Zhengzhong, Chen Xiaolang, Wang Bei, Deng Jinyuan, Zhang Dieqing, Li Hexing. Microwave-induced Assembly of CuS@MoS₂ Core-shell Nanotubes and Study on Their Photocatalytic Fenton-like Reactions[J]. Acta Chimica Sinica, ;2020, 78(9): 961-967. doi: 10.6023/A20060244 shu

Microwave-induced Assembly of CuS@MoS₂ Core-shell Nanotubes and Study on Their Photocatalytic Fenton-like Reactions

Key Laboratory of Resource Chemistry of Ministry of Education, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China

Corresponding author: Zhang Dieqing, dqzhang@shnu.edu.cn Li Hexing, hexing-li@shnu.edu.cn
Received Date: 17 June 2020
Available Online: 27 July 2020
Fund Project: Shanghai Government 18SG41the National Natural Science Foundation of China 21876112Project supported by the National Natural Science Foundation of China (Nos. 21876112, 21876112, NRF2017NRF-NSFC001-007), Program for Changjiang Scholars and Innovative Research Team in University (IRT1269) and Shanghai Government (18SG41), Shanghai Engineering Research Center of Green Energy Chemical Engineeringthe National Natural Science Foundation of China NRF2017NRF-NSFC001-007the National Natural Science Foundation of China 21876112Changjiang Scholars and Innovative Research Team in University IRT1269

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CuS@MoS₂ core-shell nanotubes were prepared by microwave-induced assembly techniques in the present work. Firstly, the Cu nanowires were vulcanized into hollow CuS nanotubes. Secondly, the sheet-shaped MoS₂ were uniformly intercalated and assembled onto the surface of CuS nanotubes. The as-prepared CuS@MoS₂ core-shell nanotubes were used in photocatalytic Fenton-like reaction system to remove high-concentration rhodamine B (RhB) in aqueous solution, which exhibited 100% degradation rate within 30 min under visible light (λ>420 nm) irradiation. The morphology and structure of the as-obtained catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDS) and X-ray diffractometry (XRD). UV-Vis absorption spectroscopy (UV-vis DRS) was used to characterize its basic optical properties. And to further learn the catalytic mechanism and make sure the active species of the photocatalytic Fenton-like reaction system, the heterojunction structure of the catalyst was analyzed and electron spin resonance (ESR) spectrum was carried to prove the existence of superoxide (·O₂^-) species. The high activity could be attributed to the unique multi-layer structure of CuS@MoS₂, corresponding to the enhanced absorption and exciting ability of visible lights. Meanwhile, the heterojunction structure formed between MoS₂ and CuS also promoted the transfer of photogenerated electrons, which could inhibit their recombination with photogenerated holes. More importantly, the cooperation mechanism formed between photocatalysis and Fenton-like reactions may exhibit strong promoting effect. The Cu²⁺ ions in CuS reacted with H₂O₂ to form a Fenton-like cycle, allowing the generation of reactive hydroxyl (·OH) species. While, the photogenerated electrons reacted with both the H₂O₂ and the molecular oxygen activated by MoS₂ to produce ·OH and ·O₂^- species. Both ·OH and ·O₂^- species worked together to oxidize pollutants rapidly. This work developed a recycled photocatalytic Fenton-like reaction system, which may offer new pathway for the treatment of environmental pollution.
- CuS@MoS₂,
- photocatalysis,
- Fenton-like reaction,
- synergistic effect,
- microwave-induced self-assembly
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Microwave-induced Assembly of CuS@MoS2 Core-shell Nanotubes and Study on Their Photocatalytic Fenton-like Reactions

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通讯作者: 陈斌, bchen63@163.com

Microwave-induced Assembly of CuS@MoS₂ Core-shell Nanotubes and Study on Their Photocatalytic Fenton-like Reactions