研究论文
冷文华,童少平,成少安,张鉴清,曹楚南.附载型二氧化钛光电催化降解苯胺机理[J].环境科学学报,2000,20(6):781-784
附载型二氧化钛光电催化降解苯胺机理
- The mechanisms of photoelectrocatalytic degradation of aniline on immobilized TiO2
- 基金项目：国家自然科学基金(29877024)资助项目
- 作者
- 单位
- 冷文华
- 浙江大学化学系, 杭州 310027
- 童少平
- 浙江大学化学系, 杭州 310027
- 成少安
- 浙江大学化学系, 杭州 310027
- 张鉴清
- 浙江大学化学系, 杭州 310027
- 曹楚南
- 浙江大学化学系, 杭州 310027
- 摘要：以附载在镍网上的TiO2为催化剂, 研究了水中苯胺光电降解行为和机理.结果表明在有氧存在时光催化能有效降解苯胺.苯胺为1.89×10-4mol/L时, 其量子产率为8.12%.缺氧时, 光反应不能进行, 但外加阳极偏压能使光催化反应进行并能大大提高苯胺的降解速率.通过GCMS技术确定其降解中间产物主要有硝基苯和偶氮苯等, 它们可最终矿化为NH4+、NO3-和CO2.
- Abstract：The photocatalytic and photoelectrocatalytic degradation behavior and mechanism of aniline were investigated with immobilized titanium dioxide on nickel as catalysts. The results showed that aniline was effectively degraded in the presence of oxygen. The quantum yield was 8.12 % when aniline was 1.89×10-4 mol/L. In the absence of oxygen, the photocatalytic reaction could not be proceeded but by imposing external bias potential it could be performed and its rate was improved largely. The main immediates of aniline were identified through GC-MS as nitrobenzene and azobenzene etc, which could be mineralized to NH4+、NO3- and CO2.
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