CoFe_(2)O_(4)-沸石复合催化剂的制备与优化  

Preparation and optimization of the CoFe_(2)O_(4)-zeolite composite catalyst

作　　者：严群[1] 苏晓洁 龚鹏程 温俊宇 晏江广 YAN Qun;SU Xiaojie;GONG Pengcheng;WEN Junyu;YAN Jiangguang(Key Laboratory of Ganzhou Watershed Pollution Simulation and Control,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Resource and Enviro nmental Engineering,Jiangxi University and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学赣州市流域污染模拟与控制重点实验室,江西赣州341000 [2]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《功能材料》2023年第12期12190-12198,共9页Journal of Functional Materials

基　　金：2022年度江西省教育厅科学技术研究项目(GJJ2200823)。

摘　　要：采用溶剂热法制备CoFe_(2)O_(4)-沸石复合材料,通过构建高分散的小纳米粒径CoFe_(2)O_(4)-沸石复合催化剂以提升其催化性能,并优化其合成条件。为测试该催化剂的催化性能,以铬黑T(EBT)为目标污染物,分析CoFe_(2)O_(4)及CoFe_(2)O_(4)-沸石复合材料活化过一硫酸盐(PMS)的效果。结合材料表征手段分析合成的催化剂的物象组成和微观形貌结构。实验结果表明:50 mL乙二醇和0.03 mol乙酸钠的条件下制备所得CoFe_(2)O_(4)粒径尺寸最小,为10.647 nm,晶粒纯度高,且0.2 g/LCoFe_(2)O_(4)和0.15 g/L PMS在30 min内对200 mg/L EBT的去除率达到73.95%。CoFe_(2)O_(4)纳米颗粒能较好地分散负载在沸石表面,形成复合催化剂,其中0.2 g/L CoFe_(2)O_(4)∶沸石-1∶1复合催化剂和0.15 g/L PMS在30 min内对200 mg/L EBT的去除率达到89.75%,降解效果较好,且该催化剂能通过外部磁铁磁选回收。此外,催化体系对EBT的降解由自由基和非自由基途径共同决定。CoFe_(2)O_(4)-zeolite composite material was synthesized using a solvothermal method to fabricate a highly dispersed and small nanoparticle size CoFe_(2)O_(4)-zeolite composite catalyst for improved catalytic performance.The synthesis conditions were optimized accordingly.To assess the catalytic activity of the catalyst,chromium black T(EBT)was employed as the target pollutant,and the activation efficiency of CoFe_(2)O_(4) and CoFe_(2)O_(4)-zeolite composite material towards peroxymonosulfate(PMS)was investigated.The synthesized catalyst was characterized using various material characterization techniques to analyze its compositional and microstructural properties.Experimental results demonstrated that CoFe_(2)O_(4) particles with the smallest size of 10.647 nm and high crystalline purity were obtained under the conditions of 50 mL ethylene glycol and 0.03 mol sodium acetate.Moreover,at a concentration of 0.2 g/L CoFe_(2)O_(4) and 0.15 g/L PMS,the removal efficiency of 200 mg/L EBT reached 73.95% within 30 minutes.The CoFe_(2)O_(4) nanoparticles were effectively dispersed and supported on the zeolite surface,for ming a composite catalyst.Specifically,the 0.2 g/L CoFe_(2)O_(4):zeolite-1∶1 composite catalyst,along with 0.15 g/L PMS,exhibited a remarkable removal efficiency of 89.75% for 200 mg/L EBT within 30 minutes,indicating excellent degradation performance,and the catalyst could be facile recovery through external magnetic separation using a magnet.Moreover,the degradation of EBT by the catalytic system was deter mined by both the radical and non-radical pathways.

关 键 词：CoFe_(2)O_(4) 沸石 溶剂热法 过一硫酸盐 可控制备 

分 类 号：X703[环境科学与工程—环境工程]