Fabrication of carbon quantum dots/TiO2/Fe2O3 composites and enhancement of photocatalytic activity under visible light

被引：66
作者：
Zhang, Jinjun [1 ]
Kuang, Meng [1 ]
Wang, Jing [1 ]
Liu, Ruirui [1 ]
Xie, Shuai [1 ]
Ji, Zhijiang [1 ]
机构：
[1] China Bldg Mat Acad, Beijing 100024, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2019年 / 730卷
关键词：
Carbon quantum dots; TiO2/Fe2O3; Photocatalysis; Visible light; DOPED TIO2/C NANOCOMPOSITES; CORE-SHELL NANOSTRUCTURES; HYDROTHERMAL SYNTHESIS; DOTS; DEGRADATION; HETEROSTRUCTURES; ALPHA-FE2O3; PHOTOANODE; NANORODS; ANATASE;
D O I：
10.1016/j.cplett.2019.06.011
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：
Carbon quantum dots/TiO2/Fe2O3 photocatalytic composite was prepared through multi-step hydrothermal method. The CQDs/TiO2/Fe2O3 composite showed enhanced photocatalytic performance for methylene blue dye photodegration when compared with TiO2/Fe2O3 and pure TiO2 under the visible light irradiation. The mechanism of the improved photocatalytic activity over CQDs/TiO2/Fe2O3 were also investigated. The CQDs can better capture and transfer photogenerated electrons through the Ti-O-C and Fe-O-C bonds. What's more, CQDs can improve the utilization of photogenerated electrons and the electrons in CQDs are captured by O-2 to produce O-center dot(2)- radicals and the role of O-center dot(2)- radicals in the photocatalytic process is significantly improved.
引用
收藏
页码：391 / 398
页数：8
相关论文
共 46 条
[1]   Synthesis of novel α-Fe2O3 nanorods without surfactant and its electrochemical performance [J].
Bazrafshan, Hamed ;
Tesieh, Zahra Alipour ;
Dabimia, Saeideh ;
Touba, Razieh Shajareh ;
Manghabati, Hamed ;
Nasernejad, Bahram .
POWDER TECHNOLOGY, 2017, 308 :266-272
[2]   A novel electroless plating of Ni-P-TiO2 nano-composite coatings [J].
Chen, Weiwei ;
Gao, Wei ;
He, Yedong .
SURFACE & COATINGS TECHNOLOGY, 2010, 204 (15) :2493-2498
[3]   Carbon quantum dots from natural resource: A review [J].
Das, Rashmita ;
Bandyopadhyay, Rajib ;
Pramanik, Panchanan .
MATERIALS TODAY CHEMISTRY, 2018, 8 :96-109
[4]   A facile coating method to construct uniform porous α-Fe2O3@TiO2 core-shell nanostructures with enhanced solar light photocatalytic activity [J].
Fu, Haitao ;
Sun, Shiyu ;
Yang, Xiaohong ;
Li, Wufa ;
An, Xizhong ;
Zhang, Hao ;
Dong, Yu ;
Jiang, Xuchuan ;
Yu, Aibing .
POWDER TECHNOLOGY, 2018, 328 :389-396
[5]   Photoinduced electron storage and surface plasmon modulation in Ag@TiO2 clusters [J].
Hirakawa, T ;
Kamat, PV .
LANGMUIR, 2004, 20 (14) :5645-5647
[6]   Synthesis of few-layer MoS2 nanosheets-coated TiO2 nanosheets on graphite fibers for enhanced photocatalytic properties [J].
Hu, Xiaolin ;
Zhao, Hang ;
Tian, Jian ;
Gao, Jianxiong ;
Li, Yujie ;
Cui, Hongzhi .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2017, 172 :108-116
[7]   Facile synthesis and characterization of N-doped TiO2/C nanocomposites with enhanced visible-light photocatalytic performance [J].
Jia, Tiekun ;
Fu, Fang ;
Yu, Dongsheng ;
Cao, Jianliang ;
Sun, Guang .
APPLIED SURFACE SCIENCE, 2018, 430 :438-447
[8]   A simple non-aqueous route to anatase TiO2 [J].
Jiang, Dong ;
Xu, Yao ;
Hou, Bo ;
Wu, Dong ;
Sun, Yuhan .
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2008, (08) :1236-1240
[9]   Obtaining carbon nanotubes from grass [J].
Kang, ZH ;
Wang, EB ;
Mao, BD ;
Su, ZM ;
Chen, L ;
Xu, L .
NANOTECHNOLOGY, 2005, 16 (08) :1192-1195
[10]   Photoanodes based on TiO2 and α-Fe2O3 for solar water splitting - superior role of 1D nanoarchitectures and of combined heterostructures [J].
Kment, Stepan ;
Riboni, Francesca ;
Pausova, Sarka ;
Wang, Lei ;
Wang, Lingyun ;
Han, Hyungkyu ;
Hubicka, Zdenek ;
Krysa, Josef ;
Schmuki, Patrik ;
Zboril, Radek .
CHEMICAL SOCIETY REVIEWS, 2017, 46 (12) :3716-3769
12345