| Pd改性TiO2的光谱特性及气相甲苯光催化降解性能 |
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| 引用本文： | 方奕文,余林,余坚,叶飞,孙明.Pd改性TiO2的光谱特性及气相甲苯光催化降解性能[J].湖南师范大学自然科学学报,2012,35(3):40-44. |
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| 作者姓名： | 方奕文 余林 余坚 叶飞 孙明 |
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| 作者单位： | 1. 广东工业大学轻工化工学院,中国广州510006;汕头大学化学系,中国汕头515063
2. 广东工业大学轻工化工学院,中国广州,510006 |
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| 基金项目： | 广东省自然科学基金重点资助项目，广东省科技计划资助项目 |
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| 摘 要： | 采用等体积浸渍法和溶胶-凝胶法制备了Pd负载(用Pd/TiO2表示)和Pd掺杂(用Pd-TiO2表示)两类TiO2催化剂,用XRD、SEM、UV-Vis DRS等对其进行分析.结果表明,用溶胶-凝胶法制备Pd-TiO2,能有效抑制产物晶粒的增长和团聚,提高晶体的相转变温度和对可见光的吸收；而用浸渍法制备Pd/TiO2,虽然也能抑制晶粒的团聚,但在500 ℃焙烧温度下,产物晶相中便出现了金红石相,且晶粒大小比纯TiO2还大.将Pd-TiO2催化剂应用于气相甲苯光催化降解反应,得到了良好的效果,当n(Pd)/n(Ti)=0.3％时,Pd-TiO2催化剂的甲苯单程降解率达到45.1％.
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| 关 键 词： | 钯 二氧化钛 改性 甲苯 光催化降解 |
Spectral Properties and Gas-Phase Toluene Photocatalytic Degradation Performance of Pd-Modified TiO2 Catalysts |
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| FANG Yi-wen
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YU Lin
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YU Jian
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YE Fei
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SUN Ming.Spectral Properties and Gas-Phase Toluene Photocatalytic Degradation Performance of Pd-Modified TiO2 Catalysts[J].Journal of Natural Science of Hunan Normal University,2012,35(3):40-44. |
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| Authors: | FANG Yi-wen YU Lin YU Jian YE Fei SUN Ming |
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| Institution: | 1 (1.Faculty of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China; 2.Department of Chemistry,Shantou University,Shantou 515063,China) |
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| Abstract: | Two kinds of Pd-modified TiO2 catalysts were synthesized by sol-gel(Pd-TiO2) and impregnation method(Pd/TiO2),and characterized by XRD,SEM and UV-Vis DRS.The results showed that the Pd-TiO2 catalysts prepared by sol-gel method can effectively suppress crystal particle growth and reunification,enhance crystal phase transition temperature and absorption of visible light.The Pd/TiO2 catalysts prepared by dipping can inhibit the reunion of the grain,but the rutile-type crystal phases occurred,and the crystallite size was larger than the pure TiO2 at calcination temperatures of 500 ℃.Application of Pd-TiO2 catalyst in photocatalytic degradation of gas-phase toluene got good results.The single-pass degradation rate of toluene reached 45.1% when the Pd/Ti atomic ratio was 0.3%. |
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| Keywords: | Pd TiO2 modify toluene photocatalytic degradation |
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