基于多因素的光催化降解动力学模型的研究

Study of photocatalytic kinetic model based on muti-factors

以纳米TiO2为光催化剂,罗丹明B为降解对象,在KL-1型紫外光实验装置中研究多种因素对光催化降解的影响并建立动力学模型。模型的主要参数有:罗丹明B初始浓度、TiO2投加量、溶液pH以及已知化合物的物理性质(分子的摩尔体积和溶解度)。建立的模型表明,反应速率常数与降解物初始浓度呈现线性关系,而与催化剂投加量的关系和单峰高斯方程吻合,与pH的关系符合双峰高斯方程。

With rhodamine B as the target compound,the kinetics model for TiO2-photocatalyzed degradation was inversitigated in suspending system with KL-1 model photochemistry reaction instrument.The main parameters involved in the model are initial concentration of rhodamine B,TiO2 dosage,pH and physical properties of the reactant（such as molar volume and aqueous solubility）.The results showed that the reaction rate is linear to the initial concentration.But the relationships between the reaction rate and TiO2 dosage and pH fitted to Single-peak Gaussian equation and Bimodal Gaussian equation,respectively.