TiO_(2)/MS光催化降解亚甲基蓝的反应动力学研究  

A Study on the Photocatalytic Degradation Kinetics of Methylene Blue by TiO_(2)/MS

作　　者：张杰 ZHANG Jie(Department of Chemistry,Hengshui University,Hengshui,Hebei 053000,China)

机构地区：[1]衡水学院化学系,河北衡水053000

出　　处：《衡水学院学报》2025年第1期34-38,共5页Journal of Hengshui University

基　　金：河北省湿地保护与绿色发展协同创新中心专项课题(2023XTCX023;2024XTCX023);衡水学院校级科研课题基金培育项目(2024XJPY02)。

摘　　要：采用浸渍法将TiO_(2)负载到三聚氰胺海绵上生成TiO_(2)/MS复合材料,在500 W氙灯照射下,对10 mg/L亚甲基蓝溶液进行光催化降解实验,探究不同TiO_(2)负载量、不同沉浸时间、不同TiO_(2)/MS投加量下亚甲基蓝溶液光催化降解反应的动力学及测定该反应的活化能。研究结果表明:1)当TiO_(2)负载量为30%、沉浸时间为3 h、TiO_(2)/MS投加量为1.2 g时,该反应光催化降解效果最好,光催化降解率为91.210%;2)该反应符合一级反应动力学规律,满足一级反应动力学(L-H)模型;3)TiO_(2)/MS复合材料的光催化活性比TiO_(2)有所提高,TiO_(2)/MS复合材料光催化降解亚甲基蓝溶液的活化能降低,反应速率提高。The TiO_(2)/MS composite material was generated by loading TiO_(2) onto melamine sponge by impregnation method.Under the irradiation of a 500 W xenon lamp,photocatalytic degradation experiments were carried out on 10 mg/L methylene blue solution to explore the kinetics of photocatalytic degradation reactions under different TiO_(2) loadings,immersion times,and dosages of TiO_(2)/MS,and to determine the activation energy of this reaction.The research results show that:1)When the TiO_(2) loading was 30%,the immersion time was 3 hours,and the dosage of TiO_(2)/MS was 1.2 g,the photocatalytic degradation effect of this reaction is the best,achieving a photocatalytic degradation rate of 91.210%;2)This reaction conforms to the first-order reaction kinetics law and satisfies the first-order reaction kinetics(L-H)model;3)The photocatalytic activity of the TiO_(2)/MS composite materials improved compared to TiO_(2).The activation energy for the photocatalytic degradation of methylene blue solution was reduced,resulting in an increased reaction rate.

关 键 词：三聚氰胺海绵 二氧化钛 亚甲基蓝 光催化 动力学 

分 类 号：O643[理学—物理化学]