期刊
MATERIALS RESEARCH BULLETIN
卷 112, 期 -, 页码 205-212出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.12.023
关键词
Semiconductors; Chemical synthesis; Electrochemical measurements; Catalytic properties
资金
- Natural Science Foundation of China [51772118, 51472005]
- Anhui Provincial Natural Science Foundation [1708085MB32]
- Natural Science Foundation of Educational Committee of Anhui Province [KJ2018B02]
- Anhui Provincial Innovation Team of Design and Application of Advanced Energetic Materials [KJ2015TD003]
Novel I-doped Bi12O17Cl2 photocatalysts have been synthesized using a facile chemical precipitation method and characterized by XRD, XPS, SEM, BET and UV-vis DRS etc. The corresponding results indicate that I- ions enter into the crystal lattices of Bi12O17Cl2 and replace partial Cl- ions. In addition, the doped I- ions form an impurity level over valence band and extend the visible light absorption ranges of Bi12O17Cl2. I-doped Bi12O17Cl2 exhibits much superior visible-light (lambda > 420 nm) photocatalytic activity to that of the pure Bi12O17Cl2 in the methyl orange (MO) and phenol degradation, because a little amount of I- ions can boost the photocharges separation efficiency, which is ensured by photoluminescence spectra, transient photocurrent responses and electrochemical impedance spectra. It is expected that this work opens a new potential pathway to improve the photocatalytic activity of non-stoichiometric ratios bismuth oxyhalide via ions doping strategy.
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