Photocatalytic H2 production with simultaneous wastewater purification over flower-like 1T/2H-MoS2-decorated CNT/CNU isotype heterojunction photocatalyst

被引:14
作者
Sun, Chenhao [1 ]
Li, Fangqin [1 ]
Ren, Jianxing [1 ]
Wu, Jiang [1 ]
Wang, Guanjun [1 ]
Chen, Linfeng [1 ]
机构
[1] Shanghai Univ Elect Power, Coll Energy & Mech Engn, Shanghai 200090, Peoples R China
关键词
Graphitic carbon nitride; Cocatalyst; Wastewater; Degradation; Hydrogen production; GRAPHITIC CARBON NITRIDE; ACTIVE EDGE SITES; HYDROGEN EVOLUTION; MOS2; NANOSHEETS; G-C3N4; METALLIC MOS2; 1T-PHASE MOS2; Z-SCHEME; ORGANIC POLLUTANT; DEGRADATION;
D O I
10.1016/j.apsusc.2021.151072
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
Exploring low-cost and earth-abundant photocatalysts to efficiently release H-2 from wastewater is an appealing solution for global energy and environmental issues. Here, we successfully prepared flower-like 1T/2H-MoS2-decorated g-C3N4 (thiourea)/g-C3N4 (urea) (denoted as CNT/CNU) isotype heterojunction photocatalysts via a facile ultrasonic dispersion method and researched the photocatalytic H-2 generation and pollutant degradation performance in oxalic acid (OA) simulated wastewater. The results displayed that 20% 1T/2H-MoS2@CNT/CNU sample exhibited the highest photoreactivity, and the H-2 release rate was 1563.32 mu molg(-1)h(-1), which was about 96 times higher than the CNT/CNU. Meanwhile, it also showed the highest total organic carbon (TOC) removal rate of 67.5%. The increased photoreactivity of nanocomposites can be ascribed to the double-interface system to effectually improve the separation of photoinduced charges. Additionally, the experimental results further confirmed that the loading of flower-like 1T/2H-MoS2 could provide abundant active sites as well as expand the visible-light absorption range. Significantly, photoelectrochemistry measurements and density functional theory (DFT) calculations also confirmed that 1T/2H-MoS2 cocatalysts accelerated the charge migration. On this basis, the mechanism of 1T/2H-MoS2@CNT/CNU promoting hydrogen production and synergistic OA degradation was proposed. This research presents a prospective idea for the utilization of waste water and the simultaneous production of clean energy.
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页数:11
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共 68 条
  • [1] Acerce M, 2015, NAT NANOTECHNOL, V10, P313, DOI [10.1038/nnano.2015.40, 10.1038/NNANO.2015.40]
  • [2] Chemically exfoliated metallic MoS2 nanosheets: A promising supporting co-catalyst for enhancing the photocatalytic performance of TiO2 nanocrystals
    Bai, Song
    Wang, Limin
    Chen, Xiaoyi
    Du, Junteng
    Xiong, Yujie
    [J]. NANO RESEARCH, 2015, 8 (01) : 175 - 183
  • [3] Targeted Synthesis of 2H-and 1T-Phase MoS2 Monolayers for Catalytic Hydrogen Evolution
    Chang, Kun
    Hai, Xiao
    Pang, Hong
    Zhang, Huabin
    Shi, Li
    Liu, Guigao
    Liu, Huimin
    Zhao, Guixia
    Li, Mu
    Ye, Jinhua
    [J]. ADVANCED MATERIALS, 2016, 28 (45) : 10033 - 10041
  • [4] Facile fabrication of novel porous graphitic carbon nitride/copper sulfide nanocomposites with enhanced visible light driven photocatalytic performance
    Chen, Xi
    Li, Huankun
    Wu, Yuxin
    Wu, Hanshuo
    Wu, Laidi
    Tan, Pengfei
    Pan, Jun
    Xiong, Xiang
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2016, 476 : 132 - 143
  • [5] In Situ Template-Free Ion-Exchange Process to Prepare Visible-Light-Active g-C3N4/NiS Hybrid Photocatalysts with Enhanced Hydrogen Evolution Activity
    Chen, Zhihong
    Sun, Peng
    Fan, Bing
    Zhang, Zhengguo
    Fang, Xiaoming
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (15) : 7801 - 7807
  • [6] In Situ Construction of g-C3N4/g-C3N4 Metal-Free Heterojunction for Enhanced Visible-Light Photocatalysis
    Dong, Fan
    Zhao, Zaiwang
    Xiong, Ting
    Ni, Zilin
    Zhang, Wendong
    Sun, Yanjuan
    Ho, Wing-Kei
    [J]. ACS APPLIED MATERIALS & INTERFACES, 2013, 5 (21) : 11392 - 11401
  • [7] Photoluminescence from Chemically Exfoliated MoS2
    Eda, Goki
    Yamaguchi, Hisato
    Voiry, Damien
    Fujita, Takeshi
    Chen, Mingwei
    Chhowalla, Manish
    [J]. NANO LETTERS, 2011, 11 (12) : 5111 - 5116
  • [8] Fast and Efficient Preparation of Exfoliated 2H MoS2 Nanosheets by Sonication-Assisted Lithium Intercalation and Infrared Laser-Induced 1T to 2H Phase Reversion
    Fan, Xiaobin
    Xu, Pengtao
    Zhou, Dekai
    Sun, Yifan
    Li, Yuguang C.
    Nguyen, Minh An T.
    Terrones, Mauricio
    Mallouk, Thomas E.
    [J]. NANO LETTERS, 2015, 15 (09) : 5956 - 5960
  • [9] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE
    FUJISHIMA, A
    HONDA, K
    [J]. NATURE, 1972, 238 (5358) : 37 - +
  • [10] Decoration of NiCoP nanowires with interlayer-expanded few-layer MoSe2 nanosheets: A novel electrode material for asymmetric supercapacitors
    Gao, Xiangyang
    Yin, Linxin
    Zhang, Lili
    Zhao, Yafei
    Zhang, Bing
    [J]. CHEMICAL ENGINEERING JOURNAL, 2020, 395