Nanosilver anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient catalytic degradation of organic dyes  

作　　者：Fan Zhang Ce Gao Shang-Ru Zhai Qing-Da An 

机构地区：[1]Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials,Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery,College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第7期893-905,共13页化学科学与工程前沿（英文版）

基　　金：This research was financially supported by the National Natural Science Foundation of China(Grant Nos.21776026,22075034,and 22178037);Liaoning Revitalization Talents Program(Grant Nos.XLYC1902037 and XLYC2002114);Natural Science Foundation of Liaoning Province of China(Grant No.2021-MS-303).

摘　　要：A novel alginate/poly(acrylic acid/acrylamide)double-network hydrogel composite with silver nanoparticles was successfully fabricated using the sol–gel method.The presence of carboxyl and amide groups in the network structure provided abundant active sites for complexing silver ions,facilitating the in situ reduction and confinement of silver nanoparticles.In batch experiments,the optimal silver loading was 20%,and 5 mmol·L^(–1) of p-nitrophenol was completely degraded in 113 s with a rate constant value of 4.057×10^(−2) s^(–1).In the tap water system and simulated seawater system,the degradation time of p-nitrophenol at the same concentration was 261 and 276 s,respectively,with a conversion rate above 99%.In the fixed-bed experiment,the conversion rate remained above 74%after 3 h at a flowing rate of 7 mL·min^(–1).After 8 cycling tests,the conversion rate remained at 98.7%.Moreover,the catalyst exhibited outstanding performance in the degradation experiment of four typical organic dyes.

关 键 词：double-network hydrogel dye degradation silver nanoparticles ALGINATE 

分 类 号：O64[理学—物理化学]