| CdS/TiO2光催化去除水体中氨氮的研究 |
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| 引用本文： | 陈晓慧,柳丽芬,杨凤林,张兴文,余济美. CdS/TiO2光催化去除水体中氨氮的研究[J]. 影像科学与光化学, 2007, 25(2): 89-101. DOI: 10.7517/j.issn.1674-0475.2007.02.89 |
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| 作者姓名： | 陈晓慧 柳丽芬 杨凤林 张兴文 余济美 |
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| 作者单位： | 大连理工大学,环境与生命学院,教育部工业生态与环境工程重点实验室,辽宁,大连,116023;大连理工大学,环境与生命学院,教育部工业生态与环境工程重点实验室,辽宁,大连,116023;大连理工大学,纳米材料科学研究中心,辽宁,大连,116023;香港中文大学,化学系,香港,沙田 |
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| 摘 要： | 利用溶胶-凝胶法制备了不同比率的CdS掺杂TiO2复合纳米颗粒催化剂,并用其进行了紫外光、日光灯和太阳光全波长光催化去除水中氨氮和其它形式无机氮的对比实验研究.考察了添加催化剂的量、CdS复合比率、有氧化态氮亚硝酸根或硝酸根与氨氮共存时光催化脱氮的耦合效果、外加光源等对脱除氨氮效率的影响,并研究了后3个因素对CdS光腐蚀程度的影响.对于氨氮初始质量浓度为50mg/L的模拟废水,在通空气搅拌条件下,n(CdS):n(TiO2)=0.17的CdS/TiO2催化剂脱氮效果最佳,此时经紫外光照2h后脱除氨氮效率达41.5%.实验结果表明:复合催化剂中CdS的含量是影响光催化活性和光腐蚀程度的重要因素.
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| 关 键 词： | 溶胶-凝胶法 氨氮 二氧化钛 硫化镉 光腐蚀 |
| 收稿时间： | 2006-09-15 |
Removing Ammonia Nitrogen from Water Using CdS/TiO2 Photocatalyst |
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| CHEN Xiao-hui,LIU Li-fen,YANG Feng-lin,ZHANG Xing-wen,YU Jimmy C. Removing Ammonia Nitrogen from Water Using CdS/TiO2 Photocatalyst[J]. Imaging Science and Photochemistry, 2007, 25(2): 89-101. DOI: 10.7517/j.issn.1674-0475.2007.02.89 |
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| Authors: | CHEN Xiao-hui LIU Li-fen YANG Feng-lin ZHANG Xing-wen YU Jimmy C |
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| Affiliation: | 1. MOE Key Lab on Industrial Ecology and Environmental Engineering, School of Environmental and Biological Science & Technology, Dalian University of Technology, Dalian 116023, Liaoning, P. R. China;2. Department of Chemistry, The Chinese University of Hong Kong, Shatin, HKSAR |
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| Abstract: | CdS/TiO2 composite photocatalysts were prepared by using a sol-gel method.The catalysts were tested in removing ammonia pollutant in water by photocatalysis under the illumination of different light sources (UV,solar light,fluorescent lamp,indoor natural light).The effects of the CdS to TiO2 ratio,catalyst concentration,addition of nitrite/nitrate on ammonium removal were also investigated.The test results showed that the optimum ratio of n(CdS)to n(TiO2) is 0.17∶1,with 50 mg/L ammonium in water,the removal of NH4-N reaches 41.5% after 2 hours of irradiation.When purged with nitrogen gas,both ammonium nitrogen and nitrate/nitrite can be simultaneously removed.It is concluded that the ratio of n(CdS)∶n(TiO2) is important for the synergetic photocatalytic activity and the extent of photo-corrosion of CdS was reduced in the mixed composite catalyst CdS/TiO2. |
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| Keywords: | sol-gel ammonia nitrogen TiO2 CdS photo-corrosion |
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