| TiO2/活性炭催化剂对4-CP的吸附和光催化活性 |
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| 引用本文： | 徐甦,雷乐成,周明华. TiO2/活性炭催化剂对4-CP的吸附和光催化活性[J]. 环境化学, 2006, 25(5): 562-566 |
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| 作者姓名： | 徐甦 雷乐成 周明华 |
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| 作者单位： | 浙江林学院环境科技学院,临安,311300;浙江大学环境工程研究所,杭州,310027;浙江大学环境工程研究所,杭州,310027 |
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| 摘 要： | 采用常压金属有机物化学气相沉积技术在活性炭表面沉积构成纳米TiO2催化剂,XRD分析表明,沉积在活性炭表面的TiO2为锐钛矿晶型.TEM分析表明负载量为8%(wt)时,TiO2颗粒的粒径为10-20nm;载体负载前后BET面积仅改变了6%,表明负载TiO2后对活性炭的结构影响不大.利用Langmuir-Hinshelwood动力学模型探讨了TiO2/活性炭催化剂对4-CP的吸附行为和光催化活性之间的关系,求出4-CP降解反应速率常数Kr,在紫外光照条件下催化剂对4-CP的吸附明显增强.
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| 关 键 词： | 对氯苯酚 光催化 二氧化钛 活性炭 |
| 收稿时间： | 2005-10-14 |
| 修稿时间： | 2005-10-14 |
PHOTOCATALYTIC PERFORMANCE OF TiO2 LOADED ON ACTIVE CARBON(AC) ON DEGRADATION OF 4-CP |
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| XU Su,LEI Le-cheng,ZHOU Ming-hua. PHOTOCATALYTIC PERFORMANCE OF TiO2 LOADED ON ACTIVE CARBON(AC) ON DEGRADATION OF 4-CP[J]. Environmental Chemistry, 2006, 25(5): 562-566 |
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| Authors: | XU Su LEI Le-cheng ZHOU Ming-hua |
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| Abstract: | The adsorption characteristics of 4-CP on TiO_(2)/AC catalyst system have been investigated.The relationship of the photodegradation of 4-CP and the adsorption behavior of 4-CP on TiO_(2)/AC catalyst can be(described) by the Langmuir-Hinshelwood(L-H)kinetics model.The adsorption equlibrium constant calculated by Langmuir adsorption isotherms under dark adsorption conditions is smaller than calculated by L-H kinetics model under UV-light photodegradation,which shows that the adsorption of 4-CP on TiO_(2)/AC catalyst has(increased) when under UV-light photodegradation. |
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| Keywords: | tetrachlorophenol photocatalysis titanium dioxide active carbon. |
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