Urea-based hydrothermal growth, optical and photocatalytic properties of single-crystalline In(OH)₃ nanocubes

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• 作者：Tingjiang Yan ; Xuxu Wang ; Jinlin Long ; Ping Liu ; Xianliang Fu ; Guoying Zhang ; Xianzhi Fu
• 关键词：Urea ; Hydrothermal synthesis ; Benzene ; Photocatalyst ; In(OH)₃
• 刊名：Journal of Colloid and Interface Science
• 出版年：2008
• 出版时间：15 September 2008
• 年：2008
• 卷：325
• 期：2
• 页码：425-431
• 全文大小：973 K

文摘

Nearly monodisperse single-crystalline In(OH)₃ nanocubes were successfully synthesized using In(NO₃)₃4.5H₂O as indium source in the presence of urea and cetyltrimethyl ammonium bromide (CTAB) by a two-step hydrothermal process: the stock solution was heated at 70 °C for 24 h and then at 120 °C for 12 h. The structure and morphology of the resultant In(OH)₃ samples were determined by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results revealed that most of as-synthesized In(OH)₃ nanocubes were uniform in size, with the average edge length of 700 nm. The influences of the reaction temperature, the reaction time, the mineralizer, and the surfactant on the morphology of the obtained products were discussed in detail. Room-temperature photoluminescence (PL) spectrum of the In(OH)₃ nanocubes showed a peculiar strong emission peak centered at 480 nm. Furthermore, the photocatalytic properties of the In(OH)₃ nanocubes were tested. It was found that In(OH)₃ exhibited not only higher activity for benzene removal, but also better H₂ evolution from water than the commercial Degussa P25 TiO₂.