Influencing factors in catalytically bactericidal process of Ag-Ce/AlPO4 catalyst in water
文献类型：期刊论文
| 作者 | Chang Qingyun1; He Hong1; Qu Jiuhui1; Zhao Jincai2 |
| 刊名 | CHINESE JOURNAL OF CATALYSIS
 |
| 出版日期 | 2008-03-01 |
| 卷号 | 29期号:3页码:215-220 |
| 关键词 | Aluminum Phosphate Silver Cerium Supported Catalyst Reactive Oxygen Species Catalytically Bactericidal Process E. Coli Drinking |
| ISSN号 | 0253-9837 |
| 英文摘要 | Influencing factors in the catalytically bactericidal process over a Ag-Ce/AlPO4 catalyst against E. coli in water were investigated. The bactericidal effect of the catalyst decreased with the increase in initial bacterial concentration. A 100% inactivation of E. coli using Ag-Ce/AlPO4 at 25 degrees C was achieved in 120 min when the initial bacterial concentration was 5 X 10(5) CFU/ml. Therefore, this catalytic method is sufficient for disinfection of drinking water. Once the initial bacterial concentration was fixed, the bactericidal activity increased with increasing temperature from 25 to 40 degrees C. The pH value also played an important role in the bactericidal process. The Ag-Ce/AlPO4 catalyst exhibited high bactericidal activity under weak alkaline conditions, while almost no bactericidal effect was observed at acidic pH. Electron spin resonance was used to detect the reactive oxygen species involved in the bactericidal process at different pH values. Hydroxyl radical center dot OH with strong oxidative ability proved to be formed under weak alkaline conditions and was not observed at acidic pH. These results give evidence of our proposed catalytically bactericidal mechanism, in which -OH is the key intermediate responsible for the efficient inactivation of E. coli by Ag-Ce/AlPO4 in water at room temperature. |
| 语种 | 英语 |
| WOS记录号 | WOS:000254925900005 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63125]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chang Qingyun |
| 作者单位 | 1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang Qingyun,He Hong,Qu Jiuhui,et al. Influencing factors in catalytically bactericidal process of Ag-Ce/AlPO4 catalyst in water[J]. CHINESE JOURNAL OF CATALYSIS,2008,29(3):215-220. |
| APA | Chang Qingyun,He Hong,Qu Jiuhui,&Zhao Jincai.(2008).Influencing factors in catalytically bactericidal process of Ag-Ce/AlPO4 catalyst in water.CHINESE JOURNAL OF CATALYSIS,29(3),215-220. |
| MLA | Chang Qingyun,et al."Influencing factors in catalytically bactericidal process of Ag-Ce/AlPO4 catalyst in water".CHINESE JOURNAL OF CATALYSIS 29.3(2008):215-220. |
入库方式： OAI收割
来源：化学研究所
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