首页|ZIF-8改性细菌纤维素膜的制备及对盐酸四环素吸附性能研究

ZIF-8改性细菌纤维素膜的制备及对盐酸四环素吸附性能研究

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使用生物基有机材料细菌纤维素(BC)作为载体,沸石咪唑骨架-8(ZIF-8)为客体材料,采用一步真空抽滤法,制备BC/ZIF-8复合纤维膜.通过FT-IR、XRD、SEM、EDS、BET等对制备的复合纤维膜进行了结构表征,考察了接触时间、温度、离子浓度,底物的初始浓度对复合纤维膜吸附盐酸四环素(TC)的影响.结果表明改性后的复合纤维膜较初始BC膜具有更丰富的孔结构,氮气吸附-脱附曲线测得比表面积从6.2415 m2/g增加到265.8820 m2/g.吸附实验表明,离子浓度对吸附影响较小,吸附过程符合准二级动力学模型和Langmuir等温吸附模型,TC主要以单层吸附的形式吸附到在BC/ZIF-8复合纤维膜上,理论最大吸附量为438.59 mg/g.
Preparation of ZIF-8 modified bacterial cellulose membrane and adsorption performance study on tetracycline hydrochloride
In this study,bacteria cellulose/zeolite imidazole framework-8(BC/ZIF-8)composite fiber membrane was prepared by one-step vacuum filtration method using zeolite imidazole framework-8 and bacterial cellulose as carrier.The structure of the composite fiber membrane was characterized by FT-IR,XRD,SEM,EDS and BET techniques.The effects of contact time,temperature,ion concentration and initial substrate concentration on the adsorption of tetracycline hydrochloride(TC)on the composite fiber membrane were investigated.The results showed that the BC/ZIF-8 composite fiber membrane had a richer pore structure than the BC mem-brane,and the specific surface area increased from 6.2415 m2/g to 265.8820 m2/g.The adsorption experiment shows that the ion concentration has insignificant effect on adsorption,and the adsorption process follows the quasi second-order kinetic model and Langmuir isotherm adsorption model.The adsorption of TC on the BC/ZIF-8 composite fiber membrane was mainly in the form of monolayer adsorption,with a theoretical maximum adsorption capacity of 438.59 mg/g.

bacterial cellulosezeolite imidazole skeletonvacuum filtration methodadsorptiontetracycline hydrochloride

杨旭、汪邓兵、刘祖一、凤权

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安徽工程大学安徽省先进纤维材料工程研究中心,安徽芜湖 241000

细菌纤维素 沸石咪唑骨架 真空抽滤法 吸附 盐酸四环素

安徽省重点研究与开发计划项目安徽省自然科学基金安徽省自然科学基金联合基金

20221070200062008085ME139S202302b04020063

2024

功能材料
重庆材料研究院 中国仪器仪表学会仪表材料学会

功能材料

CSTPCD北大核心
影响因子:0.918
ISSN:1001-9731
年,卷(期):2024.55(7)