TiO2/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 TiO2/MS
张杰1
作者信息
- 1. 衡水学院 化学系,河北 衡水 053000
- 折叠
摘要
采用浸渍法将TiO2 负载到三聚氰胺海绵上生成TiO2/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TiO2 负载量、不同沉浸时间、不同TiO2/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 TiO2 负载量为30%、沉浸时间为 3 h、TiO2/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)TiO2/MS 复合材料的光催化活性比 TiO2 有所提高,TiO2/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.
Abstract
The TiO2/MS composite material was generated by loading TiO2 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 TiO2 loadings,immersion times,and dosages of TiO2/MS,and to determine the activation energy of this reaction.The research results show that:1)When the TiO2 loading was 30%,the immersion time was 3 hours,and the dosage of TiO2/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 TiO2/MS composite materials improved compared to TiO2.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Key words
melamine sponge/Titanium Dioxide/methylene blue/photocatalytic degradation/kinetics引用本文复制引用
出版年
2025
NETL
NSTL
万方数据