Fabrication of MoS2QDs/ZnO nanosheet 0D/2D heterojunction photocatalysts for organic dyes and gaseous heavy metal removal

被引：65
作者：
Gang, Ruiqi [1 ]
Xu, Lei [1 ]
Xia, Yi [2 ,3 ]
Cai, Jun [4 ]
Zhang, Libo [1 ]
Wang, Shixing [1 ]
Li, Rui [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Natl Local Joint Lab Engn Applicat Microwave Ener, Kunming 650093, Yunnan, Peoples R China
[2] Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Yunnan, Peoples R China
[3] Analyt & Testing Res Ctr Yunnan, Kunming 650093, Yunnan, Peoples R China
[4] Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming 650500, Yunnan, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2020年 / 579卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
OD/2D heterojunction; MoS2; QDs; ZnO nanosheets; RhB degradation; Elemental mercury removal; MOS2 QUANTUM DOTS; GAS-PHASE HG-0; CARBON NITRIDE; Z-SCHEME; EFFICIENT SYNTHESIS; ELEMENTAL MERCURY; OXIDATION REMOVAL; ZNO NANOSHEETS; GRAPHENE OXIDE; NANOCOMPOSITES;
D O I：
10.1016/j.jcis.2020.06.116
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, a novel 0D/2D heterojunction photocatalyst based on MoS2 QDs/ZnO nanosheets was successfully constructed by a simple two-step process, and its photocatalytic behavior for organic dyes (RhB) degradation and gaseous heavy metals (Hg) removal under ultraviolet light were studied. For the optimum 5% MoS2/ZnO photocatalyst, 95% of RhB could be removed in 50 min, and 99.8% of the gaseous mercury could be removed in 60 min. Besides, MoS2 QDs/ZnO nanosheets also exhibited excellent photocatalytic durability. The constructed 0D/2D heterojunctions could efficiently improve the separation efficiency and charge transfer of photogenerated carriers, thus improving the photocatalytic activity. Therefore, this strategy provided a new way to design bifunctional 0D/2D heterojunction photocatalysts for water treatment and air pollution. (C) 2020 Elsevier Inc. All rights reserved.
引用
收藏
页码：853 / 861
页数：9
相关论文
共 52 条
[1]   Visible-light photocatalysis in nitrogen-doped titanium oxides [J].
Asahi, R ;
Morikawa, T ;
Ohwaki, T ;
Aoki, K ;
Taga, Y .
SCIENCE, 2001, 293 (5528) :269-271
[2]   Graphene oxide and carbon nitride nanosheets co-modified silver chromate nanoparticles with enhanced visible-light photoactivity and anti-photocorrosion properties towards multiple refractory pollutants degradation [J].
Chen, Fei ;
Yang, Qi ;
Wang, Shana ;
Yao, Fubing ;
Sun, Jian ;
Wang, Yali ;
Zhang, Chen ;
Li, Xiaoming ;
Niu, Chenggang ;
Wang, Dongbo ;
Zeng, Guangming .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2017, 209 :493-505
[3]   Construction of carbon nitride and MoS2 quantum dot 2D/0D hybrid photocatalyst: Direct Z-scheme mechanism for improved photocatalytic activity [J].
Fu, Yanhui ;
Li, Zhijun ;
Liu, Qinqin ;
Yang, Xiaofei ;
Tang, Hua .
CHINESE JOURNAL OF CATALYSIS, 2017, 38 (12) :2160-2170
[4]   Strongly Coupled g-C3N4 Nanosheets-Co3O4 Quantum Dots as 2D/0D Heterostructure Composite for Peroxymonosulfate Activation [J].
Gao, Huihui ;
Yang, Hongcen ;
Xu, Jinzhang ;
Zhang, Shouwei ;
Li, Jiaxing .
SMALL, 2018, 14 (31)
[5]   Solvent-exfoliation of transition-metal dichalcogenide MoS2 to provide more active sites for enhancing photocatalytic performance of BiOIO3/g-C3N4 photocatalyst [J].
Guan, Yu ;
Wu, Jiang ;
Lin, Yuyu ;
Liu, Qizhen ;
Qi, Yongfen ;
Pan, Weiguo ;
He, Ping ;
Qi, Xuemei ;
Wang, Run ;
Ji, Zhonghao .
APPLIED SURFACE SCIENCE, 2019, 481 :838-851
[6]   Two-Dimensional Vanadium-Doped ZnO Nanosheet-Based Flexible Direct Current Nanogenerator [J].
Gupta, Manoj Kumar ;
Lee, Ju-Hyuck ;
Lee, Keun Young ;
Kim, Sang-Woo .
ACS NANO, 2013, 7 (10) :8932-8939
[7]   Peculiar synergetic effect of MoS2 quantum dots and graphene on Metal-Organic Frameworks for photocatalytic hydrogen evolution [J].
Hao, Xuqiang ;
Jin, Zhiliang ;
Yang, Hao ;
Lu, Gongxuan ;
Bi, Yingpu .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2017, 210 :45-56
[8]   Porous ZnO nanosheets grown on copper substrates as anodes for lithium ion batteries [J].
Huang, X. H. ;
Xia, X. H. ;
Yuan, Y. F. ;
Zhou, F. .
ELECTROCHIMICA ACTA, 2011, 56 (14) :4960-4965
[9]   Doping ZnO Electron Transport Layers with MoS2 Nanosheets Enhances the Efficiency of Polymer Solar Cells [J].
Huang, Yi-Jiun ;
Chen, Hsiu-Cheng ;
Lin, Hsi-Kuei ;
Wei, Kung-Hwa .
ACS APPLIED MATERIALS & INTERFACES, 2018, 10 (23) :20196-20204
[10]   Facile and Cost-Efficient Synthesis of Quasi-0D/2D ZnO/MoS2 Nanocomposites for Highly Enhanced Visible-Light-Driven Photocatalytic Degradation of Organic Pollutants and Antibiotics [J].
Islam, Sk Emdadul ;
Hang, Da-Ren ;
Chen, Chun-Hu ;
Sharma, Krishna Hari .
CHEMISTRY-A EUROPEAN JOURNAL, 2018, 24 (37) :9305-9315
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