Enhanced Photocatalytic Degradation of Aqueous Nitrobenzene Using Graphitic Carbon鈥揟iO2 Composites

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• 作者：Wan-Kuen Jo ; Yangsoo Won ; Ingyu Hwang ; Rajesh J. Tayade
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：March 5, 2014
• 年：2014
• 卷：53
• 期：9
• 页码：3455-3461
• 全文大小：352K
• 年卷期：v.53,no.9(March 5, 2014)
• ISSN：1520-5045

文摘

Graphitic carbon鈥揟iO₂ nanocomposites with different carbon loadings were synthesized by a one-pot hydrothermal method. The prepared catalysts were characterized by X-ray diffractometry (XRD), scanning electron microscopy, UV鈥搗is diffuse reflectance spectrophotometry, and Brunauer鈥揈mmett鈥揟eller surface area analysis. The XRD results confirmed the presence of graphite in the composite without alteration of the TiO₂ structure. The photocatalytic efficiencies of the synthesized composites were determined by the degradation of aqueous nitrobenzene (NB) under UV irradiation. Because of the presence of graphitic carbon in the composite, there was an increase in the adsorption of NB (24%) on the composite surface, which led to a higher photocatalytic yield (up to 96% in 4 h at a graphitic carbon content of 1%). NB degradation was corroborated by chemical oxygen demand determinations.