| 弱紫外光下NOx气相光催化氧化研究 |
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| 引用本文： | 祝静艳,曾玉燕,匡代彬,徐安武,童叶翔.弱紫外光下NOx气相光催化氧化研究[J].中山大学学报(自然科学版),2001,40(6):31-34. |
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| 作者姓名： | 祝静艳 曾玉燕 匡代彬 徐安武 童叶翔 |
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| 作者单位： | 中山大学化学与化学工程学院, |
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| 基金项目： | 教育部博士点科研基金资助项目(97055807);中山大学化学与化学工程学院本科生"创新生实验研究基金”资助项目 |
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| 摘 要： | 弱紫外光下(室内自然光及太阳光),利用TiO2薄膜对NOx气相光催化氧化降解进行研究.太阳光下,当相对湿度小于80%、流量为0.5L*min-1时,NOx光催化氧化降解率很高,最高达到97%.对弱紫外下NOx光催化氧化降解量子产率进行了较详细的研究与讨论,同时考察了气流湿度对NOx光催化氧化活性的影响.红外分析表明反应产物为硝酸,催化剂失活是由于反应产物硝酸吸附在催化剂表面而造成.研究结果表明,TiO2光催化氧化技术对大气中NOx净化具有良好的应用前景.
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| 关 键 词： | NOx 光催化氧化 弱紫外光 氮氧化物 二氧化钛薄膜 污染治理 光催化降解 |
| 文章编号： | 0529-6579(2001)06-0031-04 |
| 修稿时间： | 2001年2月25日 |
Gas-Phase Photocatalytic Oxidation of NOxunder Weak Intensity UV Irradiation |
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| ZHU Jing-yan,ZENG Yu-yan,KUANG Dai-bin,XU An-wu,TONG Ye-xiang.Gas-Phase Photocatalytic Oxidation of NOxunder Weak Intensity UV Irradiation[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2001,40(6):31-34. |
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| Authors: | ZHU Jing-yan ZENG Yu-yan KUANG Dai-bin XU An-wu TONG Ye-xiang |
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| Abstract: | The gas-solid heterogeneous photocatalytic oxidation using TiO 2 thin film was conducted, and it was found that the degradation efficiency of dilute NO x in air was very high, reaching a maximum of 97% under the sunlight irradiation at the optimal experimental conditions. The photocatalytic reaction quantum yields, and effects of relative humidity on the photocatalytic oxidation were studied. The product of NO x photocatalytic oxidation was detected to be HNO 3 by FTIR. The greater part of HNO 3 was adsorbed on TiO 2 surface, causing catalyst deactivation. The results showed that this process has potential applications for the elimination of NO x in air. |
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| Keywords: | NO x photocatalytic oxidaition titanium dioxide gas-phase weak intensity UV |
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