摘要
以钛酸正丁酯、硝酸银为原料,采用溶胶-凝胶和水热协同的方法制备了不同载Ag量的Ag-TiO2光催化材料。采用XRD、红外光谱对其进行结构表征,TG-DSC对其进行热稳定性表征,紫外可见光谱对其进行光吸收表征。为了评估Ag-TiO2光催化材料的催化活性,在中性条件下以Ag-TiO2作为光催化剂,进行了在紫外光下催化降解甲基橙的实验,考察了不同载Ag量Ag-TiO2的光催化性能。实验表明,适量负载Ag后的TiO2在紫外光下光催化性能得到提高。当载Ag量为0.15%时光催化效果最好,过高的载Ag量反而会降低TiO2催化降解甲基橙的活性。
Ag-doped nanoscale TiO2 photocatalysts were prepared with tetrabutyl titanate and silver nitrate as raw materials by the sol-gel and hydrothermal method.The structure,heat stability and optical properties of the Ag-doped TiO2 photocatalysts were characterized by XRD,IR,TG-DSC and UV-Vis.In order to evaluate the catalytic property of Ag-doped TiO2,the catalyzed degradation reaction of methyl orange was carried out under ultraviolet light at neutral conditions.The experimental results showed that the Ag-doped TiO2 catalysts exhibited the good photocatalytic performance under UV light in comparison with pure TiO2.According to experimental results,Ag-doped TiO2 with the loading quantity of 0.15% was the best.However,The more load of Ag on TiO2 can reduce the catalytic activity for methyl orange because the more amount of silver can decrease the light absorption of TiO2.
出处
《化工新型材料》
CAS
CSCD
北大核心
2011年第9期36-39,共4页
New Chemical Materials
基金
国家自然科学基金项目(21003001)
教育部回国人员启动基金项目
河南省教育厅自然科学研究计划项目(2010A150001)
关键词
二氧化钛
银
溶胶-凝胶
光催化
甲基橙
titanium dioxide
silver
sol-gel
photocatalyst
methyl orange
