BiOI thin film via chemical vapor transport: Photocatalytic activity, durability, selectivity and mechanism

BiOI thin film via chemical vapor transport: Photocatalytic activity, durability, selectivity and mechanism
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通过化学气相传输的 BiOI 薄膜:光催化活性、耐久性、选择性和机理

DOI:
10.1016/j.apcatb.2012.10.011
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发表时间:
2013-02
期刊:
Applied Catalysis B: Environmental
影响因子:
--
通讯作者:
Zan, Ling
Zan, Ling
中科院分区:
其他
文献类型:
--
作者:
Ye, Liqun;Chen, Junnian;Tian, Lihong;Liu, Jinyan;Peng, Tianyou;Deng, Kejian;Zan, Ling

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首次采用低温化学气相输运(CVT)法制备了BiOI薄膜(BiOI TF),并对其进行了X射线衍射、X射线光电子能谱、场发射扫描电子显微镜、透射电子显微镜、高分辨电子显微镜、快速傅里叶变换和紫外漫反射等表征。所合成的BiOI薄膜由高度对称的BiOI纳米片组成,主要露出{001}晶面。其光催化活性、耐久性和选择性均优于基准的P25TiO2薄膜,其原因分别来自于薄膜的层状结构和良好的光电化学性能、CVT的固定化以及{001}面上100%的端氧原子。最后,对光催化产生O2-−的机理进行了探讨。
BiOI thin film (BiOI TF) was prepared via a low temperature chemical vapor transport (CVT) route for the first time, and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, fast-Fourier transform pattern and UV–vis diffuse reflectance. As-synthesized BiOI thin film was composed of high symmetrical BiOI nanosheets with dominant exposed {001} facets. It displayed better photocatalytic activity, durability and selectivity than benchmark P25 TiO2thin film and the origin come from the layered structure and good photoelectrochemical performance, CVT immobilization, the 100% terminal oxygen atoms of {001} facets, respectively. At end, the photocatalytic mechanism with O2−production was studied.
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