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Shape‐Dependent CeO 2 @BiOI for Degradation of Aqueous Cr(VI)
Author(s) -
Peng Shuaishuai,
Yang Jingxia,
Guo Lei,
Wang Jinjie,
Zhao Jiachang,
Xu Jingli,
Li Zhiquan
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201901879
Subject(s) - materials science , nanocomposite , x ray photoelectron spectroscopy , photocatalysis , nanorod , aqueous solution , photoluminescence , degradation (telecommunications) , nanoparticle , composite number , molar ratio , chemical engineering , octahedron , nuclear chemistry , nanotechnology , catalysis , composite material , crystallography , crystal structure , organic chemistry , chemistry , telecommunications , optoelectronics , computer science , engineering
CeO 2 with different morphologies (nanoparticles/NP, nanorods/NR, nanocubes/NC, nano‐octahedra/NO) are synthesized and decorated on BiOI nanoplates substrates to form CeO 2 @BiOI composites, which are used for aqueous Cr(VI) degradation. The intersurface states between BiOI and diverse CeO 2 nanoparticles exhibit distinct behaviors when checked by XPS and photoluminescence intensity. The Cr(VI) degradation results show that the synthesized CeO 2 @BiOI nanocomposites possess higher photocatalytic activity than pure CeO 2 or BiOI, and the CeO 2 ‐NP@BiOI nanocomposite (molar ratio of CeO 2 : BiOI = 1:2) is the best one among them, with which the Cr(VI) is degraded up to 95.0% after 30 min irradiation using it as the photocatalyst. The superior catalytic performance of CeO 2 ‐NP@BiOI can be attributed to a higher Ce 3+ ratio of CeO 2 ‐NP, a larger specific surface area, relatively low OH/CO 3 2− content on the composite surface, and especially the good interaction between the CeO 2 (111) facet and the BiOI surface.