文献类型：期刊文献

英文题名：Zeolitic imidazolate framework-8/graphene oxide/magnetic chitosan nanocomposites for efficient removal of Congo red from aqueous solution

作者：Tong, Xuefeng;Zhang, Jingjing;Chen, Qibin[1];Liu, Honglai

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：45

期号：41

起止页码：19416

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20214511115593);WOS:【SCI-EXPANDED(收录号:WOS:000704018500001)】；

基金：This work was supported by the National Natural Science Foundation of China, the Fundamental Research Funds for the Central Universities of China and the 111 Project of the Ministry of Education of China. Qibin Chen received funding from the National Natural Science Foundation of China (No. 21576079). Honglai Liu received funding from the National Natural Science Foundation of China (No. 91834301) and the 111 Project of the Ministry of Education of China (No. B08021).

语种：英文

外文关键词：Ionic strength - Surface morphology - Hydrogen bonds - Azo dyes - Chitosan - Isotherms - Morphology - Nanomagnetics - Graphene oxide - Adsorption

摘要：The removal of Congo red (CR) from aqueous solution was reported in this work using a zeolitic imidazolate framework-8/graphene oxide/magnetic chitosan (ZIF-8-GMCS) composite as a novel bio-adsorbent. Such a ZIF-8-GMCS composite consisted of magnetic Fe3O4 and ZIF-8 nanoparticles, single-layer graphene oxide (GO) and chitosan (CS), where ZIF-8 nanoparticles with a relatively regular geometry were in situ grown on the surface of the composites. The surface morphology and chemical composition of ZIF-8-GMCS were characterized using various techniques. Herein, the impact of adsorbent dosage, interference of other anionic dyes, initial pH of CR, ionic strength, initial concentration of CR solution, contact time and adsorption temperature on the adsorption performance was systematically explored. The results showed that the adsorption processes follow the Langmuir isotherm model and pseudo-second-order model and the maximum adsorption capacity derived from the Langmuir model is 476.19 mg g(-1) at 303.15 K, which is higher than that of most magnetic adsorbents toward CR. Moreover, the adsorption of ZIF-8-GMCS toward CR could be ascribed to the cooperative effect of electrostatic, hydrogen-bonding, coordination and pi-pi stacking interactions. Our finding demonstrates that ZIF-8-GMCS derived from biomass resources shows potential application prospects in the decontamination of dye wastewater.