Photocatalyzed degradation on a TiO₂-coated quartz crystal microbalance. Adsorption/desorption processes in real time in the degradation of benzoic acid and salicylic acid

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• 作者：Hisao Hidaka ; Haruo Honjo ; Satoshi Horikoshi and Nick Serpone
• 刊名：Catalysis Communications
• 出版年：2006
• 出版时间：June 2006
• 年：2006
• 卷：7
• 期：6
• 页码：331-335
• 全文大小：297 K

文摘

The photocatalytic degradations of benzoic acid, phenol and salicylic acid were examined subsequent to in situ adsorption/desorption of the organic substrates on a TiO₂-coated quartz crystal microbalance (QCM). The amount of substrate adsorbed from the bulk aqueous solution on the TiO₂-coated QCM sensor was investigated at different pH under dark conditions. The order of adsorption was salicylic acid > phenol benzoic acid on the acidic side; phenol > benzoic acid > salicylic acid under neutral conditions; benzoic acid > phenol salicylic acid in alkaline media. Salicylic acid was an intermediate in the photodegradation of benzoic acid.