| TiO_2-Cu_2O复合光催化材料的制备及其在可见光条件下对罗丹明B的降解 |
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| 引用本文： | 陆萱,贾金平,余锡宾,王亚林,李侃. TiO_2-Cu_2O复合光催化材料的制备及其在可见光条件下对罗丹明B的降解[J]. 净水技术, 2011, 30(1): 58-61 |
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| 作者姓名： | 陆萱 贾金平 余锡宾 王亚林 李侃 |
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| 作者单位： | 1. 上海师范大学化学系,上海,200234
2. 上海交通大学环境科学与工程学院,上海,200240 |
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| 基金项目： | 国家自然科学基金，博士点基金 |
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| 摘 要： | 采用钛酸四丁酯水解和水合肼还原醋酸铜的方法制取不同比例的TiO2-Cu2O复合材料。由于Cu2O的禁带宽度是2.0eV,对可见光有吸收,Cu2O和TiO2表面能够形成异质结,可见光激发Cu2O而在其导带产生的电子能够迅速转移到TiO2导带。这样可以有效阻止Cu2O电子空穴对的复合,提高量子效率。通过XRD、TEM、UV-vis等手段进行表征,得到样品的组成、形貌、性能等信息。通过光催化实验评判：经其优化条件在150℃的真空干燥箱中烘3 h,在可见光下降解罗丹明B的能力最强。
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| 关 键 词： | 光催化 罗丹明B 可见吸收 |
Preparation of TiO2-Cu2O Photocatalysts and Degradation of Rhodamine B Solution under Visible Irradiation |
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| Lu Xuan,Jia Jinping,Yu Xibin,Wang Yalin,Li Kan. Preparation of TiO2-Cu2O Photocatalysts and Degradation of Rhodamine B Solution under Visible Irradiation[J]. Water Purifcation Technology, 2011, 30(1): 58-61 |
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| Authors: | Lu Xuan Jia Jinping Yu Xibin Wang Yalin Li Kan |
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| Affiliation: | Lu Xuan1,Jia Jinping2,Yu Xibin1,Wang Yalin2,Li Kan2(1.Department of Chemistry,Shanghai Normal University,Shanghai 200234,China,2.School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China) |
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| Abstract: | Different molar ratios of TiO2-Cu2O were synthesized by hydrolyzing tetrabutyl titanate and reducing copper acetate with hydrazine hydrate.Since the band gap potential of Cu2O is only 2.0eV,which has the ability to absorb the visible light,heterojunction can be generated on the surface of Cu2O and TiO2.Electronics generated on the conduction band of Cu2O by visible irradiation were transferred to that TiO2 easily.The recombination of electron–hole（e-h） pairs was suppressed and thus the quantum efficiency was enhanced.XRD,TEM,UV-vis techniques were taken to characterize the composite oxides in order to detect the composition,the shape and the property of the samples.Tests of photo-catalytic degradation in Rhodamine B solution demonstrate that the sample baked at 150 ℃ in vacuum for 3 h possesses the best degradation ability. |
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| Keywords: | photocatalysis Rhodamine B visible absorption |
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