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Preparation of composite MnO2@ZIF-8/PES catalytic membranes and catalytic oxidation performance of formaldehyde

Authors： WANG Yuyang, XIAO Zeyi, FAN Senqing, MAI Zenghui, QIN Yangmei

Units： School of Chemical Engineering, Sichuan University, Chengdu 610065, China

KeyWords： MnO2@ZIF-8/PES, deep permeation, catalytic membranes, HCHO catalysis

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2020,40(3):65-71

Abstract：

Composite MnO2@ZIF-8/PES catalytic membranes were prepared by deep permeation synthesis fabrication method. First, ZIF-8 nanoclusters were in-situ synthesized inside PES membrane pores, and then MnO2 nanoparticles were continued to be assembled both inside and on the surface of ZIF-8. The catalysis oxidation of formaldehyde solution was carried out by continuous flowing method through membranes to explore their catalytic performance. The experiment results show that, with aqueous HCHO solution at initial concentration of 0.2mM and temperature of 25 oC and with flowrate of 0.25 ml/h (corresponding a hydraulic retention time of 30 min), HCHO degradation efficiency could be achieved by 72%. Moreover, at higher temperature of 85 oC, the HCHO degradation efficiency could be achieved as high as 99%. Compared with MnO2@ZIF-8 powder catalysts, composite MnO2@ZIF-8/PES catalytic membrane has presented higher catalytic activity and better stability. Besides, the constant of reaction rate and the apparent activation energy could be fitted perfectly as 0.0194 1/min (25 oC) and 19.72 kJ/mol respectively. After undergoing several catalytic reaction tests, the composite MnO2@ZIF-8/PES catalytic membranes still illustrated nice catalytic duration performance.

Funds：

中央高校基本科研业务费（项目编号20822041B4013）；四川大学“化工之星”优秀青年人才培育计划（项目编号2020304401013）

AuthorIntro：

作者简介：王宇阳（1995— ），女，四川成都人，硕士研究生，研究方向为膜反应器及膜催化. < wangyy_1995@163.com> *通讯联系人

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