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| Ba/TiO2/MCM-41光催化降解对硝基苯甲酸 | |
| 引用本文： | 石飞,刘红,李杨薇,黄青,宋卫坤.Ba/TiO2/MCM-41光催化降解对硝基苯甲酸[J].环境工程学报,2012,6(8):2629-2634. |
| 作者姓名： | 石飞 刘红 李杨薇 黄青 宋卫坤 |
| 作者单位： | 1. 武汉科技大学资源与环境工程学院,武汉,430081 2. 武汉科技大学城市学院实验中心,武汉,430085 3. 武汉科技大学耐火材料与高温陶瓷重点实验室,武汉,430081 4. 中国水利水电科学研究院水利研究所,北京,100048 |
| 基金项目： | 湖北省武汉市科技计划项目（200861113462） |
| 摘 要： | 以钛酸丁酯为钛源、MCM-41分子筛为载体,采用溶胶-凝胶法制备了掺杂与负载相结合的光催化剂Ba/TiO2/MCM-41。结果表明:Ba/TiO2/MCM-41是一种比表面积高达341.2 m2/g的介孔材料,主要晶相为锐钛矿相,比P25有更强的紫外光吸收。将Ba/TiO2/MCM-41用于光催化氧化水中的对硝基苯甲酸,当催化剂投加量为0.5 g/L,对硝基苯甲酸初始pH为4、浓度为2×10-4mol/L时,紫外光照30 min后,对硝基苯甲酸降解率达到96.0%。用紫外光谱、红外光谱和高效液相色谱分析对硝基苯甲酸降解前后的变化,发现随着光照时间延长,苯环上的硝基、羧基吸收峰逐渐减弱;对硝基苯甲酸首先被降解为一些中间小分子产物,随着反应进行,小分子物质也逐渐被降解。 |
| 关 键 词： | Ba/TiO2/MCM-41 对硝基苯甲酸 光催化 降解率 |
Photocatalytic degradation of p-nitrobenzoic acid with Ba/TiO2/MCM-41 |
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| Shi Fei,Liu Hong,Li Yangwei,Huang Qing and Song Weikun.Photocatalytic degradation of p-nitrobenzoic acid with Ba/TiO2/MCM-41[J].Techniques and Equipment for Environmental Pollution Control,2012,6(8):2629-2634. | |
| Authors: | Shi Fei Liu Hong Li Yangwei Huang Qing and Song Weikun |
| Institution: | 1.College of Resources and Environment Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;2.Experiment Center,City College of Wuhan University of Science and Technology,Wuhan 430085,China;3.Cultivation Base for State Key Laboratory in Refractories and High-Temperature Ceramics,Wuhan University of Science and Technology,Wuhan 430081,China;4.Department of Irrigation and Drainage,China Institute of Water Resources and Hydropower Research,Beijing 100048,China) |
| Abstract: | A composite photocatalyst,Ba/TiO2/MCM-41,was prepared by sol-gel method using titanate butyl acetate as titanium source and MCM-41 molecular sieve as carrier.The results showed that Ba/TiO2/MCM-41 was a mesoporous material with the surface area of 341.15 m2/g and its main crystalline phase was still anatase phase,and the ultraviolet absorption of Ba/TiO2/MCM-41 was stronger than P25.The photodegradation rate reached 96.0% under 30 min UV-irradiation with the dosage of 0.5 g/L of Ba/TiO2/MCM-41,the initial concentration of 2×10-4mol/L and the pH of 4 of p-nitrobenzoic acid.The productions of intermediates during photodegradation were monitored using ultraviolet spectrum,infrared spectrum and HPLC analysis.It was found that with the increase of irradiation time,the absorption peaks of p-nitrobenzoic acid decreased,the absorption peaks of nitryl and carboxyl in benzene rings decreased and the intermediates emerged,with the reaction,small molecules were also degradated gradually. |
| Keywords: | Ba/TiO2MCM41 p-nitrobenzoic acid photocatalysis degradation rate |
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