Fe3O4@NiSiO3纳米催化剂制备及其催化臭氧化降解对苯二甲酸性能的实验研究  

Preparation of Fe_3O_4@NiSiO_3 Nano-catalyst and Its Catalytic Ozonation for Degradation of Terephthalic Acid

作　　者：牛建瑞[1,2] 赵雅晴 贾秀秀 李文亚[1,2] 刘艳芳[1,2] 李再兴 NIU Jian-rui;ZHAO Ya-qing;JIA Xiu-xiu;LI Wen-ya;LIU Yan-fang;LI Zai-xing(School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;School of Environmental Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;Pollution Prevention Biotechnology Laboratory of Hebei Privince,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学环境工程学院,石家庄050018 [2]河北科技大学河北省污染防治生物技术实验室,石家庄050018 [3]河北科技大学建筑工程学院,石家庄050018

出　　处：《科学技术与工程》2018年第27期91-97,共7页Science Technology and Engineering

基　　金：博士科研启动基金、河北省自然科学基金(E2016208116)资助。

摘　　要：采用水热法和溶胶凝胶法制备Fe_3O_4@SiO_2纳米颗粒,经表面镍刻蚀得到Fe_3O_4@NiSiO_3磁性纳米催化剂。利用XRD、TEM和磁滞回线(VSM)等方法表征催化剂的晶体和表面结构。构建类均相催化臭氧化体系,考察其催化降解对苯二甲酸性能。结果表明:在臭氧通入量为10.52 mg·min^(-1)、催化剂投加量为40 mg·L^(-1)和初始溶液pH=9的条件下,催化臭氧化反应20 min时对苯二甲酸降解率为78.13%,总有机碳(TOC)去除率27.25%;5次循环实验后,对苯二甲酸的降解率仅下降2.75%。Fe 3O 4@SiO 2 nanoparticles were synthesized by hydrothermal synthesis method and sol gel method,and Fe 3O 4@NiSiO 3 magnetic nano-catalyst was obtained by the surface nickel etching.The crystal structure and surface structure of the catalyst were characterized by XRD,TEM,BET and VSM.The catalytic degradation of terephthalic acid was investigated.And the results showed that the degradation rate of terephthalic acid was 78.13%and the TOC removal rate was 27.25%,when the ozonation reaction was 1 052 mg·min^-1 and the catalyst was increased by 40 mg·L^-1 and the initial solution pH=9.After 5 cycles,the PTA degradation rate decreased by only 2.75%.

关 键 词：Fe3O4@NiSiO3 催化臭氧化 纳米催化剂 对苯二甲酸 性能研究 

分 类 号：X703[环境科学与工程—环境工程]