摘要
研究了二氧化钛悬浆体系中具有不同结构和不同取代基的八种染料化合物在太阳光作用下的降解过程 .实验中测定了染料溶液的脱色速度、总有机碳去除率以及降解过程中部分无机离子的生成情况 .结果显示 ,在此条件下 ,八种染料化合物均得到不同程度的降解 .着重比较了染料分子在光催化降解过程中 ,不同取代基以及取代基的不同位置对染料分子降解及无机离子生成情况的影响 ,从而进一步揭示了染料分子的光催化降解机理 .
The photocatalytic degradation of eight commercial dyes with different structures and containing different substitute groups has been investigated using TiO 2 as photocatalyst in aqueous solution under solar irradiation. Rate of decolorization, TOC decrease and inorganic ion production of the dye solutions were detected. The experimental results indicate that eight commercial dyes could be degradated efficiently at different levels. The decolorization rate is faster than the mineralization rate. The comparison of chloride and sulfate ion production rates from the cleavage of substitute groups in different structure positions reveals the dye compounds degradation pattern and decomposition pathway.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2000年第4期327-331,共5页
基金
国家自然科学基金!资助项目 ( 2 963 70 1 0
598780 51 )
关键词
二氧化钛
太阳光
光催化
染料
降解
废水处理
titania, sunlight, photocatalysis, dye, decolorization, mineralization, degradation
