光响应纤维素基印迹吸附材料的制备及光再生性能
Preparation and photo-regeneration properties of photo-responsive cellulose based imprinted adsorption materials
王璐颖 1邱越洺 1张睿 1许平凡 2刘以凡 3林春香 3刘明华3
作者信息
- 1. 福州大学 环境与安全工程学院,福州 350108
- 2. 福州大学先进制造学院,福建 晋江 362200
- 3. 福州大学 环境与安全工程学院,福州 350108;福州大学先进制造学院,福建 晋江 362200;福建省农村废弃物绿色循环技术工程研究中心,福州 350108
- 折叠
摘要
光响应性吸附材料对污染物的光控释放性能,对发展吸附材料的绿色再生具有重要的意义.以纤维素为原料,偶氮苯衍生物为功能单体,以典型农药残留2,4-D为模板,采用表面引发原子转移自由基聚合(SI-ATRP)制备光响应纤维素印迹吸附剂(Cell-AB-MIP).通过单因素实验对材料的制备条件进行优选,采用多种表征手段对材料结构和性能进行分析.结果表明:Cell-AB-MIP表面含有丰富的官能团(—COOH,N=N等),对2,4-D具有较高的特异性识别作用;偶氮苯基团的引入使得Cell-AB-MIP具备优异的光再生性能.经过紫外光照射后,Cell-AB-MIP上的偶氮苯基团将从反式构型转变为顺式构型,从而改变吸附剂对污染物的吸附亲和力,实现光控条件下的清洁脱附.在甲醇介质中光照解吸效率可达72.22%,经过5次光循环后对2,4-D的吸附百分比仍可达到83.47%;SEM及EA分析结果证实了吸附剂经紫外光照射后污染物可从吸附剂表面脱离,完成吸附剂的再生过程.
Abstract
The photoresponsive adsorption materials are of great significance to the light controlled release performance of pollutants and the development of green regeneration of adsorption materials.A photo-responsive cellulose based imprinted adsorbent(Cell-AB-MIP)was synthesized by surface-initiates atom transfer radical polymerization(SI-ATRP)using cellulose as raw material,azobenzene derivatives as functional monomers,and the typical pesticide residues 2,4-D as template.The synthetic conditions were optimized by single factor experiment,and the structure and performance of the material was analyzed by some characterization methods.The results show that the surface of Cell-AB-MIP contains abundant functional groups(—COOH,N=N,etc.),which have a high specific recognition effect for 2,4-D.The introduction of azobenzene group makes Cell-AB-MIP have excellent photo-induced regeneration performance.The azobenzene group on Cell-AB-MIP surface changes from trans-configuration to cis-configuration under UV irradiation,then changing the binding affinity of adsorbent for pollutants,thus realizing green regeneration via UV-light.The desorption efficiency can reach 72.22%in methanol medium under UV light irradiation.After 5 times of cycle,the adsorption percentage to 2,4-D still remains 83.47%.The analysis results of SEM and EA confirm that the adsorbed pollutants can be separated from the surface of the adsorbent after UV irradiation,completing the regeneration process.
关键词
纤维素/分子印迹/光响应/2,4-D/绿色再生Key words
cellulose/molecular imprinting/photo-responsive/2,4-D/green regeneration引用本文复制引用
基金项目
福建省自然科学基金项目(2020J01506)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据