Room-temperature synthesis of CuxS (x=1 or 2) co-modified TiO2 nanocomposite and its highly efficient photocatalytic H2 production activity

被引:19
作者
Dang, Haifeng [1 ]
Cheng, Zhiyu [1 ]
Yang, Wei [2 ]
Chen, Wei [3 ]
Huang, Weiqing [1 ]
Li, Baoqing [4 ]
Shi, Zhisheng [2 ]
Qiu, Yongfu [1 ]
Dong, Xinfa [2 ]
Fan, Hongbo [1 ]
机构
[1] Dongguan Univ Technol, Sch Environm & Civil Engn, Guangdong Engn & Technol Res Ctr Adv Nanomat, Dongguan 523808, Peoples R China
[2] South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
[3] Henan Univ, Sch Chem & Chem Engn, Kaifeng 475001, Peoples R China
[4] Guangdong Polytech Environm Protect Engn, Key Lab Heavy Met Pollut Control & Resources Comp, Foshan 528216, Peoples R China
基金
中国国家自然科学基金;
关键词
Nanocomposite; TiO2; Precipitation; CuxS; Photocatalytic activity; VISIBLE-LIGHT IRRADIATION; HYDROGEN-PRODUCTION; H-2-PRODUCTION ACTIVITY; CHARGE-TRANSFER; EVOLUTION; WATER; COCATALYST; SEMICONDUCTOR; GRAPHENE; CUS;
D O I
10.1016/j.jallcom.2017.03.177
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
TiO2 nanoparticles functionalized with CuxS (CuxS-TiO2, x =1 or 2) photocatalysts were synthesized via a facile precipitation method at room temperature. The resulting products were well characterized by XRD, TEM, EDS, XRF, BET, XPS, UV-vis and PL. The performance of H-2 production by photocatalytic water decomposition for the CuxS-TiO2 nanocomposite was examined in methanol aqueous solution using a 300 W Xe lamp as light source. Results showed that the activities of the CuS and Cu2S dual-cocatalysts co-loaded samples exhibited highly efficient water splitting capabilities for H-2 evolution, and 5.62 mmol h(-1) g(-1) of H-2 production was achieved with the composition-optimized CuxS-TiO2, which was more efficient than those of single cocatalyst deposited samples and TiO2 alone. It is proposed that the co-deposition of CuS and Cu2S onto TiO2 nanoparticle surface could efficiently extend light absorption toward visible light range, facilitate the separation of photoinduced charge carriers and consequently enhance the photocatalytic H-2 production activity. The present work not only shows the possibility for the simultaneous utilization of CuxS mixtures as efficient cocatalysts and photosensitizers to significantly facilitate the photoactivity of H-2 evolution, but also offers a general, feasible strategy for constructing ternary hybrid photocatalysts with other multivalent non-noble metal compounds as cocatalysts for target applications in solar energy conversion. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:422 / 430
页数:9
相关论文
共 41 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]   Simple solvothermal routes to synthesize nanocrystalline Bi2MoO6 photocatalysts with different morphologies [J].
Bi, Jinhong ;
Wu, Ling ;
Li, He ;
Li, Zhaohui ;
Wang, Xuxu ;
Fu, Xianzhi .
ACTA MATERIALIA, 2007, 55 (14) :4699-4705
[3]   MoS2/Graphene Cocatalyst for Efficient Photocatalytic H2 Evolution under Visible Light Irradiation [J].
Chang, Kun ;
Mei, Zongwei ;
Wang, Tao ;
Kang, Qing ;
Ouyang, Shuxin ;
Ye, Jinhua .
ACS NANO, 2014, 8 (07) :7078-7087
[4]   Semiconductor-based Photocatalytic Hydrogen Generation [J].
Chen, Xiaobo ;
Shen, Shaohua ;
Guo, Liejin ;
Mao, Samuel S. .
CHEMICAL REVIEWS, 2010, 110 (11) :6503-6570
[5]   Noble-metal-free Cu2S-modified photocatalysts for enhanced photocatalytic hydrogen production by forming nanoscale p-n junction structure [J].
Chen, Yubin ;
Qin, Zhixiao ;
Wang, Xixi ;
Guo, Xu ;
Guo, Liejin .
RSC ADVANCES, 2015, 5 (23) :18159-18166
[6]   Facile synthesis of Co(OH)2 modified TiO2 nanocomposites with enhanced photocatalytic H2 evolution activity [J].
Dang, Haifeng ;
Dong, Xinfa ;
Dong, Yingchao ;
Fan, Hongbo ;
Qiu, Yongfu .
MATERIALS LETTERS, 2015, 138 :56-59
[7]   TiO2 nanotubes coupled with nano-Cu(OH)2 for highly efficient photocatalytic hydrogen production [J].
Dang, Haifeng ;
Dong, Xinfa ;
Dong, Yingchao ;
Zhang, Yan ;
Hampshire, Stuart .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2013, 38 (05) :2126-2135
[8]   Hydrogen production by photocatalytic water-splitting using Cr- or Fe-doped TiO2 composite thin films photocatalyst [J].
Dholam, R. ;
Patel, N. ;
Adami, M. ;
Miotello, A. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2009, 34 (13) :5337-5346
[9]   Non-noble metal Cu-loaded TiO2 for enhanced photocatalytic H2 production [J].
Foo, Wei Jian ;
Zhang, Chun ;
Ho, Ghim Wei .
NANOSCALE, 2013, 5 (02) :759-764
[10]   ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].
FUJISHIMA, A ;
HONDA, K .
NATURE, 1972, 238 (5358) :37-+