Synthesis of Indium Borate and Its Application in Photodegradation of 4-Chlorophenol

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• 作者：Jixiang Yuan ; Qiang Wu ; Peng Zhang ; Jianghong Yao ; Tao He ; Yaan Cao
• 刊名：Environmental Science & Technology (ES&T)
• 出版年：2012
• 出版时间：February 21, 2012
• 年：2012
• 卷：46
• 期：4
• 页码：2330-2336
• 全文大小：446K
• 年卷期：v.46,no.4(February 21, 2012)
• ISSN：1520-5851

文摘

Indium borate has been prepared by a sol鈥揼el method. The structure, morphology, and photophysics of the resultant photocatalysts have been studied via the techniques of X-ray diffraction (XRD), transmission electron microscopy (TEM), and diffuse reflectance UV鈥搗isible light spectroscopy. These photocatalysts have been used to photodegrade 4-chlorophenol. The photocatalytic activity depends on the annealing temperature during preparation. It is found that borates can exhibit a high photodegradation activity under UV-light irradiation, for which the efficiency can be higher than that of as-prepared TiO₂. This is explained according to the results of fluorescence spectra and valence band X-ray photoelectron spectroscopy (XPS). It is confirmed by the results of time-resolved photoluminescence decay spectra; i.e., the lifetime of electrons and holes involved in the radiative process can be longer for the borates than that for TiO₂. This implies that indium borate can be a promising photocatalyst for future applications in treatment of environment contaminants.