| 尹忠环,李越湘,彭绍琴,吕功煊,李树本.污染物乙醇胺Pt/TiO2光催化制氢[J].分子催化,2007,(2):155-161 |
| 污染物乙醇胺Pt/TiO2光催化制氢 |
| Photocatalytic Hydrogen Generation in the Presence of Ethanolamines over Pt/TiO2 |
| 修订日期：2006-08-07 |
| DOI： |
| 中文关键词: 光催化,氢生成,乙醇胺,降解 |
| 英文关键词:Photocatalysis,Hydrogen Generation,Ethanolamines,Degradation |
| 基金项目:国家重点规划基础研究项目(973计划)(2003CB214503)，江西省自然科学基金资助项目(0620047)，江西省教育厅科技项目资助(赣教技字[2007]54号). |
| 尹忠环 李越湘 彭绍琴 吕功煊 李树本 |
南昌大学化学系 江西南昌330047(尹忠环，李越湘，彭绍琴)
，中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室 甘肃兰州730000(吕功煊，李树本)
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| 中文摘要: |
| 研究了以污染物乙醇胺为电子给体在Pt/TiO2上光催化生成氢的反应.结果表明,三种乙醇胺都能显著地提高光催化放氢效率,且污染物也被很好降解.研究了反应时间、起始浓度、pH值对光催化放氢和污染物降解的影响.制氢和污染物降解都是在弱碱性(pH为8~9左右)时活性最好.三种乙醇胺浓度对放氢反应的影响,表观上符合Langmuir-Hinshelwood关系式.乙醇胺光催化降解最终产物主要是CO2,H2O和NH3,检测到了中间产物一乙醇胺和甲醛.探讨了可能的反应机理. |
| 英文摘要: |
| In the presence of ethanolamines (ethanolamine, diethanolamine and triethanolamine), the photocatalytic hydrogen evolution and decomposition of the pollutants over Pt/TiO2 have been investigated. The pollutants enhance photocatalytic hydrogen generation activity notably with their quick degradation. The effect of irradiation time, the initial concentrations and pH-value were investigated. The rate of the hydrogen generation and that of the decomposition of the ethanolamines reach maximum at about pH 8~9. The effect of concentration of the three ethanolamines on the hydrogen generation rate follows Langmuir-Hinshelwood kinetic model. The photocatalytic oxidation of ethanolamines mainly produces CO2, H2O and NH3. Formaldehyde and ethanolamine were detected as intermediate products. A possible reaction mechanism was discussed. |
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