摘要
以纳米TiO2为光阳极,利用薄层微型反应器纳米TiO2光电催化氧化的方法测定COD,具有快速、准确、无二次污染的特点。研究了电解质类型、光源种类等对薄层微型反应器中光电催化测定COD的影响。研究结果表明:与NaNO3和KCl比较,NaH2PO4作电解质时的紫外光吸收低、电极表面氧化性能稳定,性能良好;与镓灯、碘镓灯比较,中压汞灯的紫外光谱丰富、辐射照度大,有利于TiO2光电催化反应的进行;通过热重分析,确定电极薄膜的烧结温度为520℃。
COD was determined by photoelectrocatalytic oxidation method in a thin-layer microreactor with nano-TiO2 as anode, which is rapid,exact and without secondary pollution. The effects of different electrolyte, light sources and other factors were studied. The results indicate that： Compared with NaNO3 and KCl,the absorption amount of ultraviolet by NaH2PO4 is little and the oxidation on the surface of electrode is good and stable;Compared with gallium lamp and iodine-gallium lamp, moderate pressure mercury lamp with plentiful ultraviolet spectra and powerful radiant emittance is more applicable to photoelectrocatalytic reaction;The sintering temperature of the electrode film is measured as 520 ℃ by means of thermal gravimetric analysis.
出处
《化工环保》
CAS
CSCD
北大核心
2006年第6期443-446,共4页
Environmental Protection of Chemical Industry
基金
上海市纳米科技专项资助项目(05nm05004)
教育部2004新世纪优秀人才支持计划资助项目(NCET-04-0406)
上海市科委重大项目(03dz12032)
关键词
化学需氧量
光电催化氧化
二氧化钛
薄层微型反应器
chemical oxygen demand
photoelectrocatalytic oxidation
titanium dioxide
thin-layer microreactor
