| Ag-TiO2/SnO2纳米薄膜的制备及其光催化降解罗丹明B的性能 |
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| 引用本文： | 李爱昌,崔志鹏,李文菊.Ag-TiO2/SnO2纳米薄膜的制备及其光催化降解罗丹明B的性能[J].稀有金属材料与工程,2009,38(2):303-308. |
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| 作者姓名： | 李爱昌 崔志鹏 李文菊 |
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| 作者单位： | 廊坊师范学院,河北廊坊,065000 |
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| 摘 要： | 以光还原法沉积Ag修饰TiO2/SnO2,制各Ag-TiO2/SnO2纳米薄膜,讨论紫外光照时间、光照强度、AgNO3浓度等工艺条件对光催化活性的影响.用XRD和SEM对薄膜的结构、表面形貌和化学组成进行表征,以罗丹明B为模拟污染物对光催化性能进行测定.结果表明,最佳条件下制备的Ag-TiO2/SnO2薄膜,Ag担载量为0.51%(at%),Ag簇直径在30～90 nm之间.薄膜具有较高的光催化活性,对罗丹明B的降解率是修饰前TiO2/SnO2薄膜的1.92倍,是相同质量TiO2/ITO薄膜的2.54倍.催化活性的提高,源于反应机制的改变.薄膜中Ag-TiO2异质结的引入,一方面进一步促使光生电荷分离,另一方面加速了氧气与激发电子的还原反应.
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| 关 键 词： | 银 TiO2/SnO2纳米薄膜 光沉积 光催化 罗丹明B |
| 收稿时间： | 2008/1/28 0:00:00 |
Preparation and Photocatalytic Activity for Rhodamine B of Ag-TiO2/SnO2 Thin Films |
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| Li Aichang,Cui Zhipeng and Li Wenju.Preparation and Photocatalytic Activity for Rhodamine B of Ag-TiO2/SnO2 Thin Films[J].Rare Metal Materials and Engineering,2009,38(2):303-308. |
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| Authors: | Li Aichang Cui Zhipeng and Li Wenju |
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| Affiliation: | Langfang Normal College;Langfang 065000;China |
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| Abstract: | Silver-modified TiO2/SnO2 thin films (Ag-TiO2/SnO2 thin films) were prepared by the photodeposition method. The effects of preparation conditions on the photocatalytic activity of Ag-TiO2/SnO2 thin films were discussed. The surface morphology, chemical composition and structure of the films were characterized by SEM and XRD, and its photocatalytic properties were evaluated with Rhodamine B as model compound. The results show that the optimum content of Ag on the film surface was 0.51at% and the diameter of ... |
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| Keywords: | silver TiO2/SnO2 nanofilm photodeposition photocatalysis Rhodamine B |
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