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

doi:10.6023/A20060244

Acta Chimica Sinica ›› 2020, Vol. 78 ›› Issue (9): 961-967.DOI: 10.6023/A20060244 Previous Articles Next Articles

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微波诱导组装CuS@MoS₂核壳纳米管及其光催化类芬顿反应研究

赵晶晶, 张正中, 陈小浪, 王蓓, 邓近远, 张蝶青, 李和兴

上海师范大学化学与材料科学学院教育部资源化学重点实验室上海 200234

投稿日期:2020-06-17 发布日期:2020-07-28
通讯作者: 张蝶青, 李和兴 E-mail:dqzhang@shnu.edu.cn;hexing-li@shnu.edu.cn
基金资助:
项目受国家自然科学基金（Nos.21876112，22022608，NRF2017NRF-NSFC001-007）、长江学者与创新团队发展计划项目（IRT1269）、上海市政府（18SG41）和上海市绿色能源化学工程研究中心的资助.

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

Zhao Jingjing, Zhang Zhengzhong, Chen Xiaolang, Wang Bei, Deng Jinyuan, Zhang Dieqing, Li Hexing

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

Received:2020-06-17 Published:2020-07-28
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 21876112, 22022608, 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 Engineering.

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.

Key words: CuS@MoS₂, photocatalysis, Fenton-like reaction, synergistic effect, microwave-induced self-assembly

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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.

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微波诱导组装CuS@MoS₂核壳纳米管及其光催化类芬顿反应研究

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

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微波诱导组装CuS@MoS2核壳纳米管及其光催化类芬顿反应研究