| 异质结型AgI/AgBr/TiO2催化剂的制备及其光催化性能 |
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| 引用本文： | 曹静,林海莉,罗邦德,李辰,陈士夫. 异质结型AgI/AgBr/TiO2催化剂的制备及其光催化性能[J]. 影像科学与光化学, 2010, 28(5): 334-342. DOI: 10.7517/j.issn.1674-0475.2010.05.334 |
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| 作者姓名： | 曹静 林海莉 罗邦德 李辰 陈士夫 |
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| 作者单位： | 淮北师范大学, 化学与材料科学学院, 安徽, 淮北, 235000 |
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| 基金项目： | 国家自然科学基金，安徽省教育厅自然科学基金，安徽省"含能材料"省级重点实验室科研基金 |
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| 摘 要： | 首先以沉积-沉淀法制备AgBr/TiO2复合催化剂,然后采用离子交换法制备出新型的异质结型AgI/AgBr/TiO2光催化剂.利用XRD和UV-Vis对AgI/AgBr/TiO2光催化剂进行了表征.以甲基橙为染料模型,在可见光条件下(500 W、λ>420 nm)研究了AgI的含量对AgI/AgBr/TiO2催化活性的影响.结果表明,AgI拓展了催化剂的吸收光谱范围;AgI生成量为AgBr的5%时,AgI/AgBr/TiO2的催化活性最高.AgI/AgBr异质结的形成有利于光生电子和空穴的分离,提高AgI/AgBr/TiO2的催化活性.
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| 关 键 词： | 光催化 甲基橙 AgI/AgBr/TiO2光催化剂 |
| 收稿时间： | 2010-04-16 |
Preparation and Photocatalytic Property of Heterojunction AgI/AgBr/TiO2 Catalyst |
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| CAO Jing,LIN Hai-li,LUO Bang-de,LI Chen,CHEN Shi-fu. Preparation and Photocatalytic Property of Heterojunction AgI/AgBr/TiO2 Catalyst[J]. Imaging Science and Photochemistry, 2010, 28(5): 334-342. DOI: 10.7517/j.issn.1674-0475.2010.05.334 |
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| Authors: | CAO Jing LIN Hai-li LUO Bang-de LI Chen CHEN Shi-fu |
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| Affiliation: | College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, P. R. China |
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| Abstract: | A novel AgI/AgBr/TiO2 photocatalyst was synthesized by ion exchange of AgBr/TiO2 substrate prepared via deposition-precipitation method.AgI/AgBr/TiO2 was characterized by XRD and UV-Vis.The photocatalytic activity of AgI/AgBr/TiO2 was measured with methyl orange(MO) as dye model under the visible light condition(500 W,λ>420 nm).The results showed that AgI broadened the light absorption range of AgBr/TiO2 catalyst in visible light area and raised the photocatalytic activity of AgBr/TiO2.The maximum of photocatalytic activity of AgI/AgBr/TiO2 could be obtained when the AgI formation was 5% of AgBr.AgI/AgBr heterojunction was beneficial to separate the photogenerated elections and holes and then raised the photocatalytic activity of AgI/AgBr/TiO2. |
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| Keywords: | photocatalysis methyl orange AgI/AgBr/TiO2 photocatalyst |
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