Carbonized ZIF-8/chitosan biomass imprinted hybrid carbon aerogel for phenol selective removal from wastewater

被引：14
作者：
Qu, Yun [1 ,2 ,3 ]
Qin, Lei [2 ,3 ]
Liu, Xuguang [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China
[3] Shanxi Zheda Inst Adv Mat & Chem Engn, Taiyuan 030000, Shanxi, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2023年 / 300卷
基金：
中国国家自然科学基金;
关键词：
Imprinted carbon aerogel; Chitosan; Carbonized ZIF-8; Phenol selective adsorption; Monolithic adsorbent; ARAMID NANOFIBER AEROGEL; ADSORPTION; ADSORBENT; CELLULOSE; POLYMER;
D O I：
10.1016/j.carbpol.2022.120268
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In this work, carbonized ZIF-8/chitosan imprinted hybrid carbon aerogel (MIP@CZIF-8/CS) is constructed. The introduction of CZIF-8 effectively optimizes the specific surface area (664 m2 g-1) of imprinted matrix and further enhances the nitrogen atom doping, leading the increased adsorption sites and the formation of super -hydrophilic surface. MIP@CZIF-8/CS exhibits a remarkable phenol adsorption capacity (246.6 mg g-1) at pH of 7 and shows excellent selective adsorption towards phenol against its structural analogues. The adsorption kinetics and isotherms of MIP@CZIF-8/CS follow pseudo-second-order and Langmuir-Freundlich models, respectively. Besides, MIP@CZIF-8/CS with monolithic structure can support about 4167 times its own weight. Thanks to its monolithic structure and excellent mechanical stability, MIP@CZIF-8/CS maintains 94 % adsorption capacity after 10 cycle tests and does not contaminate application system. In addition, MIP@CZIF-8/CS can realize the dynamic filtration of phenol in fixed bed column system. The effluent phenol concentration conforms to GB8978-1996, proving its practical application potential.
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页数：11
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