文献类型：期刊文献

英文题名：Ion-imprinted sponge produced by ice template-assisted freeze drying of salecan and graphene oxide nanosheets for highly selective adsorption of mercury (II) ion

作者：Hu, Xinyu[1,2,3,4,5] Yan, Linlin[1,2] Wang, Yongmei[1] Xu, Man[1]

第一作者：胡新宇;Hu, Xinyu

通信作者：Hu, XY[1]|[a0005881e11db1c0efa81]胡新宇;

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China;[3]Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210042, Jiangsu, Peoples R China;[4]Natl Forestry & Grassland Adm, Key Lab Chem Engn Forest Prod, Beijing 100714, Peoples R China;[5]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Peoples R China

年份：2021

卷号：258

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20210509843817);Scopus(收录号：2-s2.0-85099853815);WOS:【SCI-EXPANDED(收录号:WOS:000620149700002)】；

基金：This work was supported by the Fundamental Research Funds of CAF under the Grant CAFYBB2020QB007, the Key Lab. of Biomass Energy and Material, Jiangsu Province (KLBEM) under the Grant JSBEM-S201904, and the National Natural Science Foundation of China under the Grant 31700500.

语种：英文

外文关键词：Graphene oxide nanosheets; Salecan; Ice template-assisted freeze drying; Ion-imprinting technology; Strong selectivity toward Hg2+

摘要：As a kind of potential heavy metal absorbent, polysaccharide-based materials are limited by the complicated preparation method and bad selectivity toward targeted ion. Here, a fantastic sponge was produced by combining salecan and graphene oxide (GO) nanosheets via ice template-assisted freeze drying and ionimprinting technologies. The intense intermolecular interactions between salecan and GO gave the sponge high stability. The swelling, morphology, and mechanical stiffness of the material showed highly dependent on the salecan content. Additionally, the influence of salecan content, pH, initial ion concentration, and contact time on Hg2+ adsorption was extensively investigated. Adsorption kinetics and equilibrium isotherms perfectly fitted in the pseudo-second-order and Freundlich models, reflecting the multilayer chemical-adsorption mediated mechanism. Most strikingly, the ion-imprinted sponge exhibited strong selectivity toward Hg2+ and outstanding stability with recyclability over usage of five times. These investigations provide the guidance for the construction of promising polysaccharide-based adsorbents for the remediation of Hg2+-polluted water.