| 苯胺的脉冲辐解和激光光解研究 |
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| 引用本文： | 张超杰,孙晓宇,王玫,汪世龙,倪亚明,钱素萍,林维真,韩镇辉,潘景喜,姚思德.苯胺的脉冲辐解和激光光解研究[J].辐射研究与辐射工艺学报,2001,19(1):26-31. |
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| 作者姓名： | 张超杰 孙晓宇 王玫 汪世龙 倪亚明 钱素萍 林维真 韩镇辉 潘景喜 姚思德 |
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| 作者单位： | 1. 同济大学测试中心
2. 中国科学院上海原子核研究所 |
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| 摘 要： | 用脉冲辐解与激光光解时间分辨技术，从瞬态方面研究了苯胺Photo-Fenton降解的可行性。研究表明，水溶液中苯胺可为308nm的激光光电离，光电离的瞬态产物为阳离子自由基及脱质子后的中性自由基；并测得阳离子自由基脱质子转变为中性自由基的pKa值为7．5，以二苯甲酮为参比，测得苯胺光分解的量子产额极高（0．08）。应用脉冲辐解时间分辨技术研究了苯胺被羟基自由基降解的反应机理，结果表明，36％的羟基自由基直拉进攻－NH2形成苯胺，54％的羟基自由基与苯胺邻位加成，10％的羟基自由基与苯胺对位加成。
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| 关 键 词： | 苯胺 Photo－Fenton降解 脉冲辐解 激光光解 瞬态 环境污染防治 |
| 修稿时间： | 2000年6月15日 |
A PULSE RADIOLYSIS AND LASER FLASH PHOTOLYSIS STUDY OF ANILINE |
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| ZHANG Chaojie,SUN Xiaoyu,WANG Mei,WANG Shilong,NI Yaming,QIAN Suping,LIN Weizhen,HAN Zhenhui,PAN Jingxi,YAO Side.A PULSE RADIOLYSIS AND LASER FLASH PHOTOLYSIS STUDY OF ANILINE[J].Journal of Radiation Research and Radiation Processing,2001,19(1):26-31. |
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| Authors: | ZHANG Chaojie SUN Xiaoyu WANG Mei WANG Shilong NI Yaming QIAN Suping LIN Weizhen HAN Zhenhui PAN Jingxi YAO Side |
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| Abstract: | Time –resolved pulse radiolysis and laser flash photolysis has been used to study the Photo-Fenton degradation of aniline. Using laser flash photolysis technique, it is demonstrated that aniline in aqueous solution is ionized by 308 nm photon to give hydrated electron and neutral radical resulting from rapid deprotonation of radical cation of aniline. The pKa value is found to be 7.5, and the quantum yield of the photo ionization is 0.08. Time –resolved pulse radiolysis has been used to study the reaction of aniline with *OH, and it was established that 36% *OH radical react directly with the –NH2 moiety resulting in anilino radical. The main primary process (54%) is the ortho-directed *OH-adduct.The remaining 10% *OH attack most probably the para position of the aniline ying. |
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| Keywords: | Aniline Photo-Fenton degradation Pulse radiolysis Laser flash photolysis |
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