Increased Active Sites by in Situ Growth of CoP Quantum Dots on CdS/rGO To Achieve Efficient Photocatalytic H2 Production

被引:42
作者
An, Hua [1 ]
Yan, Xiaoqing [1 ]
Li, He [1 ]
Yang, Bolun [1 ]
Wei, Jinjia [1 ]
Yang, Guidong [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Chem Engn & Technol, XJTU Oxford Int Joint Lab Catalysis, Xian 710049, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
active sites; charge transfer; internal electric field; photocatalytic H-2 generation; quantum dots; REDUCED GRAPHENE OXIDE; GRAPHITIC CARBON NITRIDE; HYDROGEN-PRODUCTION; CHARGE SEPARATION; CDS; NANOPARTICLES; COCATALYST; HYBRID; WATER; PERFORMANCE;
D O I
10.1021/acsaem.9b00439
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
Constructing numerous surface active sites to realize quick charge transfer and efficient adsorption of water molecule is of significant importance for extremely improving the photocatalytic H-2 production activity of catalyst. In this work, new ternary CoP/CdS/rGO photocatalysts were prepared using hydrothermal assisted by thermal phosphorization method. In situ growth of CoP quantum dots (QDs) is employed as the surface active sites on the CdS/rGO surface to accelerate photogenerated electrons transport and strengthen surface photo-reaction of the samples. According to the experimental and DFT calculation results, an internal electric field is built at the interface of CdS/graphene and CoP/graphene, respectively. Under solar light irradiation, the photogenerated electrons would directionally transfer from CdS to CoP QDs via the "charge transfer channel" of graphene, resulting in the efficient separation of electron-hole pairs. As a result, the ternary composites achieve unexpectedly high-efficient photocatalytic hydrogen generation activities (1.104 mmol.h(-1)), which exceed 6.8 times that of CdS. This research verifies that the introduction of more active sites is the key factor for the improvement of photocatalytic H-2 generation and provides a valuable strategy for the synthesis of high performance graphene-based photocatalyst.
引用
收藏
页码:4195 / 4204
页数:19
相关论文
共 53 条
[11]   Ultrathin MoS2 layers anchored exfoliated reduced graphene oxide nanosheet hybrid as a highly efficient cocatalyst for CdS nanorods towards enhanced photocatalytic hydrogen production [J].
Kumar, D. Praveen ;
Hong, Sangyeob ;
Reddy, D. Amaranatha ;
Kim, Tae Kyu .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2017, 212 :7-14
[12]   C sp2/sp3 hybridisations in carbon nanomaterials - XPS and (X)AES study [J].
Lesiak, B. ;
Kover, L. ;
Toth, J. ;
Zemek, J. ;
Jiricek, P. ;
Kromka, A. ;
Rangam, N. .
APPLIED SURFACE SCIENCE, 2018, 452 :223-231
[13]   Unique PCoN Surface Bonding States Constructed on g-C3N4 Nanosheets for Drastically Enhanced Photocatalytic Activity of H2 Evolution [J].
Li, Chunmei ;
Du, Yonghua ;
Wang, Danping ;
Yin, Shengming ;
Tu, Wenguang ;
Chen, Zhong ;
Kraft, Markus ;
Chen, Gang ;
Xu, Rong .
ADVANCED FUNCTIONAL MATERIALS, 2017, 27 (04)
[14]   Graphene oxide: A promising nanomaterial for energy and environmental applications [J].
Li, Fen ;
Jiang, Xue ;
Zhao, Jijun ;
Zhang, Shengbai .
NANO ENERGY, 2015, 16 :488-515
[15]   Facet-dependent interfacial charge separation and transfer in plasmonic photocatalysts [J].
Li, Jieyuan ;
Dong, Xing'an ;
Sun, Yanjuan ;
Cen, Wanglai ;
Dong, Fan .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2018, 226 :269-277
[16]   Directional electron delivery via a vertical channel between g-C3N4 layers promotes photocatalytic efficiency [J].
Li, Jieyuan ;
Cui, Wen ;
Sun, Yanjuan ;
Chu, Yinghao ;
Cen, Wanglai ;
Dong, Fan .
JOURNAL OF MATERIALS CHEMISTRY A, 2017, 5 (19) :9358-9364
[17]   Efficient infrared light promoted degradation of volatile organic compounds over photo-thermal responsive Pt-rGO-TiO2 composites [J].
Li, Juan-Juan ;
Cai, Song-Cai ;
Yu, En-Qi ;
Weng, Bo ;
Chen, Xi ;
Chen, Jing ;
Jia, Hong-Peng ;
Xu, Yi-Jun .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2018, 233 :260-271
[18]   Highly Efficient Visible-Light-Driven Photocatalytic Hydrogen Production of CdS-Cluster-Decorated Graphene Nanosheets [J].
Li, Qin ;
Guo, Beidou ;
Yu, Jiaguo ;
Ran, Jingrun ;
Zhang, Baohong ;
Yan, Huijuan ;
Gong, Jian Ru .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (28) :10878-10884
[19]   Oriented ZnmIn2Sm+3@In2S3 heterojunction with hierarchical structure for efficient photocatalytic hydrogen evolution [J].
Li, Yuexiang ;
Han, Ping ;
Hou, Yali ;
Peng, Shaoqin ;
Kuang, Xiaojun .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2019, 244 :604-611
[20]   Fe-B alloy coupled with Fe clusters as an efficient cocatalyst for photocatalytic hydrogen evolution [J].
Li, Yuexiang ;
Li, Hui ;
Li, Yafei ;
Peng, Shaoqin ;
Hu, Yun Hang .
CHEMICAL ENGINEERING JOURNAL, 2018, 344 :506-513