碳纤维负载Pd-TiO_2光催化材料的制备及表征  

Preparation and Characterization of Pd-TiO_2 Photocatalytic Materials Supported by Carbon Fibers

作　　者：傅雅琴[1] 金旭东[1] 倪庆清[2] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018 [2]信州大学

出　　处：《稀有金属材料与工程》2010年第6期1075-1078,共4页Rare Metal Materials and Engineering

基　　金：长江学者和创新团队发展计划资助项目(IRT0654);浙江省自然科学基金资助项目(Y406310)

摘　　要：以PAN基碳纤维为载体,采用溶胶-凝胶法制备碳纤维负载TiO2的光催化材料(TiO2/CF),用常温氧化-还原法在其表面沉积贵金属Pd粒子对其改性,制备碳纤维负载Pd-TiO2的光催化材料(Pd-TiO2/CF)。XRD分析表明:采用溶胶-凝胶法在碳纤维表面形成了锐钛矿型TiO2。选择偶氮类染料酸性橙Ⅱ作为光催化降解目标物,用紫外吸收光谱分析等TiO2负载量的TiO2/CF,Pd-TiO2/CF和粉末型TiO2的光催化活性。结果表明:TiO2在负载条件下光催化活性有所下降;Pd粒子沉积可有效提高光催化活性;对于酸性橙Ⅱ溶液,Pd-TiO2/CF光催化活性较TiO2/CF、粉末型TiO2均有显著提高。Carbon-fiber-supported TiO2 photocatalytic material （TiO2/CF） was prepared by sol-gel method with PAN-based carbon fibers as support. Then the TiO2/CF was modified by depositing noble metal Pd particles on its surface by oxidation-redox method at room temperature to obtain carbon-fiber-supported Pd-TiO2 photocatalytic material （Pd-TiO2/CF）. XRD analysis shows that TiO2 of anatase was formed on the surface of carbon fibers by sol-gel method. Acid orange II of azo dyes was chosen as the target of photocatalytic degradation, and the photocatalytic activities of TiO2/CF, Pd-TiO2/CF and powder TiO2 of equal load capacity were analyzed by UV absorption spectrum. The results indicate that the photocatalytic activity of powder TiO2 decreased to some extent under the supported condition; Pd particle deposition increased photocatalytic activity efficiently; the Pd-TiO2/CF has much higher photocatalytic activity for Acid orange II solution than TiO2/CF and powder TiO2

关 键 词：TIO2 钯 光催化 酸性橙Ⅱ 

分 类 号：O643.36[理学—物理化学]