期刊
CHEMICAL ENGINEERING JOURNAL
卷 304, 期 -, 页码 454-460出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.06.100
关键词
Hydrogen; Photocatalysis; Bi4O5X2; Bismuth-rich; Facet
资金
- National Natural Science Foundation of China [51502146, U1404506]
- Natural Science Foundation of Henan Department of Science Technology [142102210477]
- Natural Science Foundation of Henan Department of Education [14A150021]
- Natural Science Foundation of Nanyang Normal University [ZX2014039]
- Scientific Research Starting Project of SWPU [2015QHZ001]
- Young Scholars Development Fund of SWPU [201499010100]
Until now, BiOBr and BiOI are not used for photocatalytic H-2 evolution due to the positive CB position. In this work, bismuth-rich strategy is used to promote the CB position. Bi4O5X2 (X = Br, I) nanosheets with dominant {101} facets exposure are synthesized by molecular precursors hydrolysis route. Bi4O5Br2 and Bi4O5I2 samples were characterized by X-ray diffraction patterns (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (DRS), X-ray photoelectron spectroscopy (XPS) and photoelectrochemical measurements. Bi4O5Br2 displays higher photocatalytic activity than Bi4O5I2 for H-2 production. And the H-2 evolution rate of Bi4O5Br2 reach 6.81 ltmol h(-1) with the apparent quantum efficiency of 0.93% at 420 nm. It is the first work to report photocatalytic H2 production using Bi4O5X2 photocatalysts. (C) 2016 Elsevier B.V. All rights reserved.
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