光催化氧化-分光光度法测定痕量对硝基苯酚  

Study on the determination of trace p-nitrophenol by photocatalytic oxidation-spectrophotometry

作　　者：宋敏[1] 陈国松[1] 张红漫[1] 张之翼[1] 杨祝红[2] 冯新[2] 陆小华[2] 

机构地区：[1]南京工业大学理学院,江苏南京210009 [2]南京工业大学化学化工学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2006年第2期1-4,共4页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家杰出青年科学基金(29925616);国家自然科学基金(20246002;20236010);江苏省2003年环保科技计划项目(2003025);江苏省社会发展基金(BS2000013)

摘　　要：用超细TiO2紫外光催化氧化降解反应将对硝基苯酚中的氮完全转化为硝酸盐氮,再利用硫酸肼还原、NEDD分光光度法进行定量测定。研究发现静态吸附时间为1 h、TiO2的用量为0.6 g/L、pH值为3.0时,对硝基苯酚降解效果最好,对硝基苯酚的检出限达0.478μg/mL。A novel spectrophotometric method for the determination of p-nitrophenol was proposed. It was based upon the fact that the nitrogen of p-nitrophenol is completely converted into a form of nitrate by the action of photocatalytic oxidation of uhrafine titanium dioxide （TiO2 ）, which is further color-developed with hydrazine sulfate and NEDD. It was found that the photocatalytic degradation rate time, of p-nitrophenol 0. 6 g/L of amount of TiO2 and 3.0 of pH. The limit is optimal with 1h of static adsorption of detection （LOD） for p-nitrophenol with the method proposed is 0. 478μg/mL.

关 键 词：TIO2 光催化氧化 分光光度法 对硝基苯酚 

分 类 号：O657.13[理学—分析化学]