石墨烯复合气凝胶的制备及其吸附性能研究  

Preparation of graphene composite aerogel and its dye removal performance

作　　者：胡世棋 季涛[2] 刘其霞[1] 葛建龙 单浩如 张天昊 Hu Shiqi;Ji Tao;Liu Qixia;Ge Jianlong;Shan Haoru;Zhang Tiaohao(School of Textile and Clothing, Nantong University, Nantong 226019, China;National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, Nantong 226019, China)

机构地区：[1]南通大学纺织服装学院,江苏南通226019 [2]南通大学安全防护用特种纤维复合材料研发国家地方联合工程研究中心,江苏南通226019

出　　处：《产业用纺织品》2021年第6期20-28,33,共10页Technical Textiles

基　　金：国家自然科学基金项目(51702167)。

摘　　要：以亚硫酸氢钠为还原剂,将氧化石墨烯(GO)还原得到还原氧化石墨烯(rGO),经冷冻干燥制得石墨烯气凝胶(GA)。通过向GA内部引入活性炭纤维(ACF)和TiO_(2),制备出rGO/ACF/TiO_(2)复合气凝胶。探究了rGO/ACF/TiO_(2)复合气凝胶对RhB染料的吸附和光催化作用,并对其吸附机理和吸附光催化协同作用机理进行探讨。研究结果表明ACF和TiO_(2)能较好地嵌入到复合气凝胶中;rGO/ACF/TiO_(2)复合气凝胶的吸附和光催化性能受TiO_(2)含量、投料量、溶液初始浓度影响较大;rGO/ACF/TiO_(2)复合气凝胶的吸附过程符合准二级动力学模型及Langmuir等温线模型,且属于单分子层化学吸附。颗粒内扩散模型拟合结果表明rGO/ACF/TiO_(2)复合气凝胶的内扩散是影响其吸附RhB染料速率的主要因素,但不是唯一因素;光催化动力学研究表明rGO/ACF/TiO_(2)复合气凝胶对RhB染料的吸附过程符合一级动力学特性。The reduced graphene oxide(rGO)was obtained by reducing graphene oxide(GO)with sodium bisulfite as the reducing agent,then the graphene aerogel(GA)was made by freeze drying.And rGO/ACF/TiO_(2)composite aerogel was prepared by introducing the activated carbon fiber(ACF)and TiO_(2)into GA.Moreover,its absorption and photocatalytic performance for RhB dye solution were investigated,the absorption mechanism as well as the absorption-photocatalytic synergistic mechanism was discussed.The research results showed that ACF and TiO_(2)were well embedded in the composite aerogel,the absorption and photocatalytic performance of rGO/ACF/TiO_(2)composite aerogel were greatly affected by the content of TiO_(2),the amount of feed,and the initial concentration of RhB dye solution.The absorption process of rGO/ACF/TiO_(2)composite aerogel conformed to the quasi-second-order kinetic model and the Langmuir isotherm model,and it was a monolayer chemical absorption.The fitting results of the intra-particle diffusion model illustrated that the internal diffusion of the rGO/ACF/TiO_(2)composite aerogel was the main but not the only factor which influenced the absorption rate of RhB dye solution.The photocatalytic kinetics study found that the absorption process of rGO/ACF/TiO_(2)composite aerogel to RhB dye solution conformed to the first order Kinetic characteristics.

关 键 词：石墨烯气凝胶 ACF TiO_(2) 吸附 光催化 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]