Pt/COF-LZU1花状催化剂的制备及其对染料的催化性能  

Preparation of Pt/COF-LZU1 flower-like catalyst and its catalyticperformance for dyes

作　　者：刘巍[1,2] 孙佩芸 计雅佳 赵晶[1,2] 代昭[1,3] 魏俊富[1,2] LIU Wei;SUN Peiyun;JI Yajia;ZHAO Jing;DAI Zhao;WEI Junfu(State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China;School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China;School of Chemical Engineering and Technology,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387 [2]天津工业大学环境科学与工程学院,天津300387 [3]天津工业大学化学工程与技术学院,天津300387

出　　处：《天津工业大学学报》2024年第5期45-50,共6页Journal of Tiangong University

基　　金：中国博士后科学基金面上项目(2018M631746);天津市高等学校教育委员会科技发展基金项目(2018KJ200)。

摘　　要：为了净化染料废水,采用简单的室温合成法和原位还原法相结合,制备了具有高活性和高稳定性的Pt/COF-LZU1花状催化剂,对催化剂的形貌和化学结构进行表征,并以亚甲基蓝(MB)为模型污染物研究了催化剂的催化降解性能。结果表明:该方法操作简便,可通过调控冰醋酸(HAc)浓度可以控制COF的形貌和尺寸。当HAc浓度为17.5 mol/L时,可以制备出形态良好、尺寸均匀的花状COF-LZU1载体,并且能够均匀负载铂纳米粒子;在中性条件下,Pt/COF-LZU1花状催化剂在150 min内对MB的脱色率达到90.05%,总有机碳(TOC)去除率为89.93%,速率常数为0.01585 min^(-1);此外,催化剂具有良好的稳定性和可重用性,在5个反应循环中表现出稳定的催化效率,在环境修复等领域具有应用潜力。In order to purify dye wastewater,Pt/COF-LZU1 flower-like catalyst with high activity and stability was prepared by simple room temperature synthesis and in situ reduction method.The morphology and chemical structure of the catalyst were characterized.The catalytic degradation performance of the catalyst was studied using methylene blue(MB)as the model pollutant.The results indicated that this method was easy to operate and the morphology and size of COF could be controlled by adjusting the concentration of acetic acid(HAc).When the HAc concentration was 17.5 mol/L,the flower-like COF-LZU1 carrier with good shape and uniform size could be prepared and could support platinum nanoparticles uniformly.Under neutral conditions,the decoloration rate of MB by Pt/COF-LZU1 flower catalyst reached 90.05%within 150 min,TOC removal rate was 89.93%and the rate constant was 0.01585 min^(-1).Moreover,the catalyst showed excellent stability and reusability,exhibiting stable catalytic efficiency in 5 reaction cycles,which had potential application in environmental remediation and other field.

关 键 词：共价有机框架材料(COFs) 多相催化剂 亚甲基蓝 催化性能 废水处理 

分 类 号：TQ426.8[化学工程]