Novel photocatalyst, Bi2Sn2O7, for photooxidation of As(III) under visible-light irradiation
Novel photocatalyst, Bi2Sn2O7, for photooxidation of As(III) under visible-light irradiation
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新型光催化剂 Bi2Sn2O7,用于可见光照射下 As(III) 的光氧化
DOI:
10.1016/j.apcata.2012.03.005
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发表时间:
2012-05
期刊:
影响因子:
--
通讯作者:
Liu, Ping
中科院分区:
文献类型:
--
作者:
Zhuang, Ji;ong;Wang, Jixin;Xie, Liyan;Liu, Ping
Nanocrystalline Bi2Sn2O7, a visible-light photocatalyst synthesized via a facile hydrothermal route, is used to remove arsenite from aqueous solution for the first time. The as-synthesized Bi2Sn2O7product is characterized by X-ray diffraction, N2sorption–desorption, UV–vis diffuse reflectance spectroscopy, transmission electron microscopy, electron spin resonance, X-ray photoelectron spectra, and electrochemistry technology. The results reveal that the sample has an average particle size of approximately 10nm, a specific surface area of 51.3m2/g, and a band gap of 2.88eV. Moreover, the Bi2Sn2O7nanoparticles exhibit a high photocatalytic activity in the oxidation of As(III) (up to 96.8%) under visible-light irradiation. O2−and h+are recognized as the primary active species responsible for As(III) oxidation. Meanwhile, a possible mechanism for the photo-oxidation of As(III) over Bi2Sn2O7is also proposed.
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