光催化降解亚甲基蓝的影响因素及动力学研究

进行了亚甲基蓝在硫化镉上的暗吸附反应，并作Langmuir拟合和Freundlich拟合计算其吸附速率常数。通过实验证明硫化镉光催化降解亚甲基蓝符合一级动力学反应。在低光强下，反应速率常数随着光强的增大而增大，两者之间存在显著的线性关系。改变光催化反应温度，计算表观活化能Ea为19.13kJ/mol，证明温度对反应影响较小。

Study on Kinetics and Affection Factors of Methylene Blue Degradation by Photochemical Catalysis

MB was absorbed on nano - CdS in dark reaction. The results were used to imitate the Langmuir absorption type and the freundlioh absorption type. The process of photocatalytic decmpositiom shows that it is the first order kinetics reaction. The velocity constant increases as the intensity of light increases and the two of them have a linearity relation. The Arrhenius activation energy is 19. 13kJ/mol, it shows that the affection of temperature in photochemical catalysis decomposition is unapparent.