| 可见光响应Pt掺杂纳米TiO2的光催化氧化NOx性能 |
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| 引用本文： | 姜淑梅,胡芸,韦朝海.可见光响应Pt掺杂纳米TiO2的光催化氧化NOx性能[J].硅酸盐通报,2012,31(2):327-331. |
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| 作者姓名： | 姜淑梅 胡芸 韦朝海 |
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| 作者单位： | 华南理工大学环境科学与工程学院,工业聚集区污染控制与生态修复教育部重点实验室,广州510006 |
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| 基金项目： | 国家自然科学基金，教育部高校博士点基金，华南理工大学中央高校基本科研业务费专项资金 |
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| 摘 要： | 采用溶胶-凝胶法制备不同Pt掺杂比例的Pt-TiO2光催化剂。通过XRD、XPS、UV-vis表征光催化剂结构,在紫外光及可见光下考察其对NOx的光催化氧化活性。结果表明,所制备的Pt-TiO2均为锐钛矿相,对NOx有明显的可见光降解效果,并且以Pt/Ti比为0.4%时,其光催化活性最高。与P25及TiO2相比,Pt-TiO2在紫外光及可见光下的光催化活性均有较大提高,其NO转化率明显提高,NO2选择性生成率明显降低,归因于Pt的掺杂引入了杂质能级并促进了催化剂的光生电子-空穴对的分离。
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| 关 键 词： | TiO2 Pt掺杂 光催化氧化 NOx |
Photocatalytic Oxidation of Nitrogen Oxides over Visible-light-responsive Pt-doped Nano-TiO2 |
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| JIANG Shu-mei
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HU Yun
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WEI Chao-hai.Photocatalytic Oxidation of Nitrogen Oxides over Visible-light-responsive Pt-doped Nano-TiO2[J].Bulletin of the Chinese Ceramic Society,2012,31(2):327-331. |
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| Authors: | JIANG Shu-mei HU Yun WEI Chao-hai |
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| Affiliation: | (The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education, College of Environmental Science and Engineering,South China University of Technology,Guangzhou 510006,China) |
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| Abstract: | Various Pt-doped TiO2 with different doping ratios were prepared by sol-gel method and investigated with respect to their behavior in photocatalytic oxidation of NOx both under UV light and visible light irradiation.The catalysts were characterized by XRD,XPS,and UV-vis.All the Pt-TiO2 showed an anatase crystallite structure.The absorption edge of Pt-TiO2 shifted to the visible light region upon Pt doping.The Pt-doped TiO2 showed an obvious photocatalytic activity for NOx oxidation under visible light irradiation,and the optimal doping ratio was 0.4%.Compared to P25 and TiO2,the photocatalytic activity of Pt-TiO2 was improved apparently both under UV and visible light irradiation,showing an increase in NO conversion and a decrease in NO2 selectivity.The doping of Pt resulted to the introduction of impurity energy level and the efficient separation of photo-generated electrons and holes,thus contributed to the improvement of photocatalytic efficiency. |
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| Keywords: | titanium dioxide Pt doping photocatalytic oxidation NOx |
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