TY - JOUR
T1 - Layered Ag/Ag2O/BiPO4/Bi2WO6 heterostructures by two-step method for enhanced photocatalysis
AU - Hu, Xiaohong
AU - Ma, Qiansu
AU - Wang, Xinlong
AU - Yang, Yingjun
AU - Liu, Na
AU - Zhang, Cheng
AU - Kawazoe, Naoki
AU - Chen, Guoping
AU - Yang, Yingnan
N1 - Funding Information:
This work was supported by Scientific Research (B) 19H04310 from Japan Society for the Promotion of Science, and JSPS KAKENHI JP18J20620 .
Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2020/7
Y1 - 2020/7
N2 - Two-dimensionally layered structures are intriguing for the fundamental demand of opto-electronic devices and have broad applications due to their superior properties. In particular, layered heterostructures as promising materials in photocatalysis, have lots of active atoms exposed on the surface, which largely affect the photocatalytic performance. In this work, two-dimensional heterostructures were synthesized by a two-step hydrothermal method, in which monolayer BiPO4 chemically bonded on Bi2WO6 nano-sheets with Ag/Ag2O nanoparticles (BWO-AP). The two-step method significantly improved photocatalytic efficiency, compared with traditional one-step process. Compared to other controls, BWO-AP showed the highest quantum efficiency and photocatalytic performances for O2 revolution in distilled water and Rh B degradation. It was ascribed to its fast photoinduced charge separation and transfer. Interestingly, there also was some amount of H2 generated in distilled water, and the increased Ag0:Ag+ of BWO-AP after photocatalytic reaction could explain the consumption of photo-induced electrons from water splitting.
AB - Two-dimensionally layered structures are intriguing for the fundamental demand of opto-electronic devices and have broad applications due to their superior properties. In particular, layered heterostructures as promising materials in photocatalysis, have lots of active atoms exposed on the surface, which largely affect the photocatalytic performance. In this work, two-dimensional heterostructures were synthesized by a two-step hydrothermal method, in which monolayer BiPO4 chemically bonded on Bi2WO6 nano-sheets with Ag/Ag2O nanoparticles (BWO-AP). The two-step method significantly improved photocatalytic efficiency, compared with traditional one-step process. Compared to other controls, BWO-AP showed the highest quantum efficiency and photocatalytic performances for O2 revolution in distilled water and Rh B degradation. It was ascribed to its fast photoinduced charge separation and transfer. Interestingly, there also was some amount of H2 generated in distilled water, and the increased Ag0:Ag+ of BWO-AP after photocatalytic reaction could explain the consumption of photo-induced electrons from water splitting.
KW - Charge separation and transfer
KW - Layered heterostructures
KW - Photocatalysis
KW - Two-step hydrothermal method
KW - Water oxidation
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U2 - 10.1016/j.jcat.2020.04.002
DO - 10.1016/j.jcat.2020.04.002
M3 - Article
AN - SCOPUS:85089395979
SN - 0021-9517
VL - 387
SP - 28
EP - 38
JO - Journal of Catalysis
JF - Journal of Catalysis
ER -
