水热法制备TiO2/AC复合光催化材料及其性能研究  

Preparationand photo-catalytic characteristics of the TiO2/activated carbon composite material

作　　者：胡晓洋 严明汉 战剑锋[1] HU Xiaoyang;YAN Minghan;ZHAN Jianfeng(College ofMaterial Science and Engineering, Northeast Forestry University, Harbin 150040, China)

机构地区：[1]东北林业大学材料科学与工程学院,哈尔滨150040

出　　处：《功能材料》2020年第6期6078-6083,共6页Journal of Functional Materials

基　　金：东北林业大学基本科研业务费专项资金C类资助项目(2572019CJ01);黑龙江省自然科学基金面上资助项目(C2015053)。

摘　　要：探究了吸附-光催化协同效应对二氧化钛(TiO2)-活性炭(AC)复合材料光催化性能的影响。以钛酸四丁酯为原料,活性炭为载体,采用水热法制备出TiO2/AC二元复合光催化材料。使用XRD、SEM、EDS和FT-IR等检测技术对制备样品进行测试、分析、表征,重点分析了不同水热温度对复合材料晶体结构、形貌、组分含量及表面官能团的变化,并以甲基橙溶液(MO)模拟目标降解物,考察了在紫外光源下TiO2/AC二元复合材料对甲基橙溶液光催化效率的影响。研究结果显示:负载于AC表面的TiO2为锐钛矿型;随着水热温度的提高,负载于AC表面上的TiO2数量增加,粒径增大,分布更加均匀;经紫外光光照180 min后,所有TiO2/AC复合材料对20 mg/L甲基橙溶液的降解率均达到80%以上,优于纯TiO2的降解率,表明TiO2/AC二元协同吸附-光催化效应可明显提高复合材料对甲基橙溶液的降解效率。The objective of this work was to investigate the impact of the sorption and photo-catalytic hybrid mechanisms over the photo catalytic properties of the prepared TiO2/activated carbon composites.A photo catalytic composite material made from TiO2 and activated carbon(AC)was prepared based upon high temperature hydrothermal procedures.The TiO2/AC composite was characterized by XRD,SEM,EDS and FT-IR.The impacts of hydrothermal reaction temperature over the following composite variables,namely,the crystal phase structure,micro-morphological properties and photo catalytic characteristics for methyl orange solutions under ultraviolet light radiation,were analyzed.As the hydrothermal temperature increased,the powder dimensions of the TiO2particles deposited on AC surface increased accordingly,making the TiO2deposition states over the surface well distributed.After the UV radiation for 180 min,the decomposition rates of methyl orange(20 mg/L)triggered by TiO2/AC composite were well above 80%,indicating that the increasing effectiveness of methyl orange decomposition could be achieved through the TiO2/AC coordinated absorption-photo catalytic effect.

关 键 词：二氧化钛TiO2 活性炭AC 水热法 光催化 

分 类 号：TQ424.1[化学工程]