Photocatalyst Cd2Sb2O6.8 with High Photocatalytic Activity toward Benzene and Dyes

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• 作者：Meng Sun ; Danzhen Li ; Wenjuan Zhang ; Zhixin Chen ; Hanjie Huang ; Wenjuan Li ; Yunhui He ; Xianzhi Fu
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：August 20, 2009
• 年：2009
• 卷：113
• 期：33
• 页码：14916-14921
• 全文大小：330K
• 年卷期：v.113,no.33(August 20, 2009)
• ISSN：1932-7455

文摘

A nanocrystalline Cd₂Sb₂O_6.8 photocatalyst was synthesized from Cd(Ac)₂ and K₂H₂Sb₂O₇ via a facile hydrothermal method for the first time. The obtained sample was characterized by X-ray diffraction, N₂ sorption−desorption, UV−vis diffuse reflectance spectroscopy, transmission electron microscopy, electron spin resonance, X-ray photoelectron spectroscopy, and Fourier transformation infrared spectroscopy. The photocatalytic activity of the sample was evaluated by the degradation of benzene in an O₂ gas stream and dyes in aqueous solution under ultraviolet (UV) light illumination. The results demonstrated that Cd₂Sb₂O_6.8 had exhibited a higher photocatalytic activity than that of P25 (Degussa Co.) in the degradation of benzene. For a longtime (40 h) reaction test, Cd₂Sb₂O_6.8 maintained a high activity, and no obvious deactivation was observed. In the liquid phase, degradation of methyl orange; salicylic acid; and Rhodamine B, Cd₂Sb₂O_6.8, also exhibited high photoactivity. A possible mechanism of the photocatalysis over Cd₂Sb₂O_6.8 is proposed.