| Ag/TiO2有序多孔复合薄膜的合成及其可见光光催化活性 |
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| 引用本文： | 赵永勋,杨碚芳,傅正平.Ag/TiO2有序多孔复合薄膜的合成及其可见光光催化活性[J].中国科学技术大学学报,2011,41(5). |
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| 作者姓名： | 赵永勋 杨碚芳 傅正平 |
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| 作者单位： | 中国科学技术大学材料科学与工程系,中科院能量转换材料重点实验室,安徽合肥,230026 |
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| 摘 要： | 以自组装SiO2胶体晶体为模板,采用TiCh溶胶凝胶浸渍提拉法制备了TiO2有序多孔薄膜(TIO),然后利用AgNO3液相渗透法将Ag纳米颗粒沉积在TIO上,成功制备了Ag/TiO2有序多孔复合薄膜(ATIO).通过Raman,FESEM,TEM,XPS和Uv-vis等分析手段对复合薄膜进行了表征,结果表明:Ag纳米颗粒的平均尺寸约为10 nm,而且与TiO2晶粒之间有强的相互作用.以亚甲基蓝(MB)水溶液为目标降解物,针对不同Ag/Ti相对原子浓度比的样品,考察了其低功率可见光光催化活性及循环使用性,并与Ag/TiO2无序复合薄膜(ATF)作了对比.研究发现,AgNO3前驱体溶液浓度为10 mmol/L的ATIO样品具有最高的可见光光催化活性,其光降解率是具有相同AgNOa前驱体溶液浓度ATF的3.19倍,显著增强的光催化活性来源于Ag纳米颗粒和TIO有序多孔结构的协同效应.循环降解实验证明样品具有稳定的光催化活性.
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| 关 键 词： | TiO2有序多孔薄膜 Ag纳米颗粒 协同效应 光催化活性 |
Synthesis and visible-light photocatalytic activity of Ag/TiO2ordered porous composite films |
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| ZHAO Yongxun,YANG Beifang,FU Zhengping.Synthesis and visible-light photocatalytic activity of Ag/TiO2ordered porous composite films[J].Journal of University of Science and Technology of China,2011,41(5). |
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| Authors: | ZHAO Yongxun YANG Beifang FU Zhengping |
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| Institution: | ZHAO Yongxun,YANG Beifang,FU Zhengping(CAS Key Laboratory of Materials for Energy Conversion,Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China) |
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| Abstract: | TiO2 ordered porous films(TIO) were fabricated via TiCl4 sol-gel dip-coating process using self-assembly SiO2 colloidal crystal as templates and Ag nanoparticles were achieved on the TIO by a liquid infiltration route,and Ag/TiO2 ordered porous composite films(ATIO) were obtained.The characteristics of the composite films were measured by Raman,FESEM,TEM,XPS and UV-vis.The results reveal that the average size of Ag nanoparticles is about 10 nm,and strong interaction exists between Ag nanoparticles and TiO2 ... |
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| Keywords: | TiO2 ordered porous film Ag nanoparticle synergetic effect photocatalytic activity |
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