| 太阳光下Cr~(3+)掺杂TiO_2复合微粒光催化性能研究 |
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| 引用本文： | 冯雷,敏世雄,王芳,韩玉琦,佟永纯,张永生.太阳光下Cr~(3+)掺杂TiO_2复合微粒光催化性能研究[J].化工新型材料,2009,37(2). |
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| 作者姓名： | 冯雷 敏世雄 王芳 韩玉琦 佟永纯 张永生 |
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| 作者单位： | 河西学院化学系西部资源环境化学重点实验室,张掖,734000 |
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| 基金项目： | 西部资源环境化学重点实验室基金 |
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| 摘 要： | 利用酸催化的溶胶一凝胶法成功地合成了一系列不同CP3+掺杂量(x=0.01%～10%)的TiO2复合光催化剂(Cd3+/TiO2).在太阳光条件下,以亚甲基蓝溶液的光催化降解对复合材料的光催化性能进行了表征,并考察了催化剂投加量、Cr3+掺杂量和溶液pH值等因素对光催化降解反应的影响.结果表明,亚甲基蓝溶液在复合微粒上的光催化降解反应遵循Langmuir-Hinshelwood动力学模型,在催化剂投加量为lg/L、Cr3+掺入量为0.3%和pH=7时,Cr3+/TiO2复合微粒光催化活性达最佳,测得表观反应速率常数 K为7.27×10-3 rag(L·min)-1,t1/2为95min,反应4h后亚甲基蓝的降解率可达79%,与纯的TiO2相比较,反应速率提高了2倍,降解率提高了20%.中性或碱性条件下有利于亚甲基蓝溶液的光催化降解.
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| 关 键 词： | 复合微粒 光催化降解 亚甲基蓝 太阳光 |
Photocatalytic activity of Cr~(3+) doped TiO_2 nanoparticles under sunlight irradiation |
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| Feng Lei,Min Shixiong,Wang Fang,Han Yuqi,Tong Yongchun,Zhang Yongsheng.Photocatalytic activity of Cr~(3+) doped TiO_2 nanoparticles under sunlight irradiation[J].New Chemical Materials,2009,37(2). |
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| Authors: | Feng Lei Min Shixiong Wang Fang Han Yuqi Tong Yongchun Zhang Yongsheng |
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| Affiliation: | Department of Chemistry;Key Laboratory of Resources and Environmental Chemistry of West China;Hexi University;Zhangye 734000 |
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| Abstract: | The Cr3+ doped TiO2 composite particles with different doping amount(x=0.01%~10%) were successfully prepared by acid-catalyzed sol-gel method.Under the irradiation of sunlight,the photocatalytic activities of catalysts were studied by measuring the photodegradation rate of MB aqueous solution.The effects of catalyst dosage,doping amounts and pH value on photodegradation efficiency were also discussed.The results showed that the degradation of MB on the composite catalyst followed the Langmuir-Hinshelwood fi... |
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| Keywords: | Cr3 /TiO2 |
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