Preparation of Novel Ultrathin Co doped MoS2 Nanosheets Piezocatalyst for Fast Simultaneous Decomposition of Cr(VI) and MB in Dark

doi:10.1007/s40242-019-9006-8

高等学校化学研究 ›› 2019, Vol. 35 ›› Issue (5): 892-900.doi: 10.1007/s40242-019-9006-8

Preparation of Novel Ultrathin Co doped MoS₂ Nanosheets Piezocatalyst for Fast Simultaneous Decomposition of Cr(VI) and MB in Dark

WIN Thi Yein, WANG Qun, JIAN Jiahuang, LI Yang, WU Xiaohong

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China

收稿日期:2019-01-07 出版日期:2019-10-01 发布日期:2019-09-24
通讯作者: WU Xiaohong E-mail:wuxiaohong@hit.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(Nos. 51671074, 51572060, 51173033, 51702067).

Preparation of Novel Ultrathin Co doped MoS₂ Nanosheets Piezocatalyst for Fast Simultaneous Decomposition of Cr(VI) and MB in Dark

WIN Thi Yein, WANG Qun, JIAN Jiahuang, LI Yang, WU Xiaohong

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China

Received:2019-01-07 Online:2019-10-01 Published:2019-09-24
Contact: WU Xiaohong E-mail:wuxiaohong@hit.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos. 51671074, 51572060, 51173033, 51702067).

摘要/Abstract

摘要： Ultrathin Co doped MoS₂ nanosheets(NSs) with thickness of 3.2 nm was used to simultaneously decompose Cr(VI) and MB in dark through ultrasonic vibration-assisted piezocatalytic effect. The significantly enhanced piezocatalytic performance of Co doped MoS₂ NSs was found in comparison to the pristine MoS₂ NSs. The high piezocatalytic activity of Co doped MoS₂ NSs may originate from the large amount of charge carriers due to Co doping. The efficient separation of electron-hole pairs under spontaneous polarization were also investigated in detail, which is responsible for reduction of Cr(VI) and oxidation of methylene blue(MB). The active species trapping experiments demonstrate that e and ^·O₂^- are main active substances for Cr(VI) reduction, while h⁺, ^·OH, and ^·O₂^- participate in MB degradation.

关键词: Co doped MoS₂, Piezocatalytic, Organic dyes, Cr(VI)

Abstract: Ultrathin Co doped MoS₂ nanosheets(NSs) with thickness of 3.2 nm was used to simultaneously decompose Cr(VI) and MB in dark through ultrasonic vibration-assisted piezocatalytic effect. The significantly enhanced piezocatalytic performance of Co doped MoS₂ NSs was found in comparison to the pristine MoS₂ NSs. The high piezocatalytic activity of Co doped MoS₂ NSs may originate from the large amount of charge carriers due to Co doping. The efficient separation of electron-hole pairs under spontaneous polarization were also investigated in detail, which is responsible for reduction of Cr(VI) and oxidation of methylene blue(MB). The active species trapping experiments demonstrate that e and ^·O₂^- are main active substances for Cr(VI) reduction, while h⁺, ^·OH, and ^·O₂^- participate in MB degradation.

Key words: Co doped MoS₂, Piezocatalytic, Organic dyes, Cr(VI)

WIN Thi Yein, WANG Qun, JIAN Jiahuang, LI Yang, WU Xiaohong. Preparation of Novel Ultrathin Co doped MoS₂ Nanosheets Piezocatalyst for Fast Simultaneous Decomposition of Cr(VI) and MB in Dark[J]. 高等学校化学研究, 2019, 35(5): 892-900.

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Preparation of Novel Ultrathin Co doped MoS₂ Nanosheets Piezocatalyst for Fast Simultaneous Decomposition of Cr(VI) and MB in Dark

Preparation of Novel Ultrathin Co doped MoS₂ Nanosheets Piezocatalyst for Fast Simultaneous Decomposition of Cr(VI) and MB in Dark

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