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 photoresponsive 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 cisconfiguration 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.
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CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING
ISSN: 1001-4381
Year: 2024
Issue: 2
Volume: 52
Page: 180-189
0 . 6 0 0
JCR@2023
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