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TiO_2/Au复合空心微球的制备及催化降解性能

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Indexed by:会议论文

Date of Publication:2015-10-01

Page Number:5

Key Words:二氧化钛空心微球;纳米金;光催化;染料降解

Abstract:采用水热法制备了二氧化钛(TiO 2)空心微球,并在其表面原位还原法沉积不同量的纳米金(Au),用透射电镜(TEM)、扫描电镜(SEM)、能量色散X射线光谱(EDX)、X射线衍射光谱(XRD)对制备的材料进行结构与含量的表征,考察了不同金沉积量TiO 2/Au复合材料在紫外光或可见光下对亚甲基蓝溶液的催化降解性能。表征结果表明:所制备的二氧化钛空心微球粒径均一,晶型为锐钛矿型。光催化结果表明:纳米金沉积二氧化钛空心微球能有效提高染料降解率,将吸光区域由紫外光拓展到可见光,沉积的纳米金存在最佳量,纳米金沉积量为2.8wt%时,对亚甲基蓝降解效果最显著,当纳米金沉积量w(Au)=2.8%,催化剂用量为0.2g/L时,5mg/L亚甲基蓝溶液在紫外光下150min降解率为99.77%,在可见光下降解率达84.25%。

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