Oxygen Vacancy Induced Bismuth Oxyiodide with Remarkably Increased Visible-Light Absorption and Superior Photocatalytic Performance
Oxygen Vacancy Induced Bismuth Oxyiodide with Remarkably Increased Visible-Light Absorption and Superior Photocatalytic Performance
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氧空位诱导的碘化铋具有显着增加的可见光吸收和优异的光催化性能。
DOI：
10.1021/am507641k
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发表时间：
2014-12-24
影响因子：
9.5
通讯作者：
Ji, Hongbing
中科院分区：
文献类型：
--
作者：
Huang, Yongchao;Li, Haibo;Ji, Hongbing
随着环境问题的日益严重，水处理技术近年来引起了人们的极大关注，尤其是水和空气的净化和消毒。在此，我们展示了一种电还原策略，通过引入氧空位来显着改善BiOI纳米片光催化剂的太阳能吸收和供体密度。与未处理的BiOI纳米片相比，这些缺氧的BiOI纳米片在光吸收带中表现出约100 nm的意外红移和供体密度的1个数量级的改善，并且在可见光照射下对于甲基橙子（MO）降解表现出比未处理的BiOI纳米片高10倍的光催化活性。此外，所制备的缺氧BiOI纳米片还具有优异的循环稳定性和对其他染料污染物的上级光催化性能。
With the increasingly serious environmental problems, photocatalysis has recently attracted a great deal of attention, with particular focus on water and air purification and disinfection. Herein, we show an electroreduction strategy to improve significantly the solar absorption and donor density of BiOI nanosheet photocatalyst by introducing oxygen vacancies. These oxygen-deficient BiOI nanosheets exhibit an unexpected red shift of about 100 nm in light absorption band and 1 order of magnitude improvement in donor density compared to the untreated BiOI nanosheets and show 10 times higher photocatalytic activity than the untreated BiOI nanosheets for methyl orange (MO) degradation under visible light irradiation. Moreover, the as-prepared oxygen-deficient BiOI nanosheets also have excellent cycling stability and superior photocatalytic performance toward other dye pollutants.