复合光催化剂ZrO2-TiO2催化降解咖啡因的试验研究

摘要

The composite photocatalyst ZrO2-TiO2 was successfully synthesized using the sol-gel impregnation method. The photocatalytic degradation kinetics of caffeine with synthetized ZrO2-TiO2 was investigated under different initial concentration,photocatalyst dose,inorganic anions. The results indicated that degradation rate was quicker when the initial concentration was lower,and the optimal photocatalyst dose at highest efficiency was 0.5 g/L . Four inorganic anions,including CO32-,SO42-,Cl-,PO43-,inhibited the photocatalytic degradation of caffeine, and their inhibition effects followed the order of CO32->PO43->SO42->Cl-.%采用溶液凝胶浸渍法制备了复合光催化剂ZrO2-TiO2，研究了不同咖啡因初始浓度、复合光催化剂投加量、无机阴离子条件下对光催化降解咖啡因动力学过程的影响.结果表明，咖啡因初始浓度越低，降解速率越快，复合催化剂的最佳投加量为0．5 g/L .投加CO32-、SO42-、Cl-、PO43-四种无机阴离子的钠盐后，光催化反应的速率都受到了抑制，其抑制作用顺序为CO32-＞PO43-＞SO42-＞Cl-.