十二烷基苯磺酸钠的光催化降解研究
China Environmental Science(2002)
Abstract
研究了十二烷基苯磺酸钠(DBS)的光催化降解效率.结果表明,在实验浓度范围内,DBS的光催化降解能用准一级反应式进行拟合,且DBS的一级反应速率常数随其初始浓度的增大而降低.当体系中存在磷酸二氢钠时,DBS的光催化降解速率降低;当体系中存在三聚磷酸钠时,在其低浓度时DBS的降解速率降低,在高浓度时降解速率则增加.磷酸盐与DBS在TiO2表面会产生竞争吸附,同时也会影响体系的pH值,从而影响到DBS的光催化降解速率.
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Key words
photocatalytic degradation,illuminated titanium dioxide
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