摘要
文章利用水热法合成不同比例铈改性ZIF-8催化剂,研究其在催化降解甲苯反应中的催化活性,从而筛选出最佳铈锌比例的复合催化剂,并采用场发射扫描电镜(FE-SEM)、X-射线衍射仪(XRD)、热重分析(TG)及低温氮气吸附技术对催化剂进行表征。结果表明:铈改性ZIF-8催化剂表面分散的铈显著提高了ZIF-8的甲苯催化氧化活性,Ce∶Zn(摩尔比)=0.6∶0.4时催化剂的活性最高,甲苯转化率达90%时的温度为247℃。材料表征结果表明,合成催化剂颗粒尺寸不均一,热稳定性良好。
A series of Ce-ZIF-8 composites were prepared by a hydrothermal synthesis method using different mole ratios of Ce and Zn for the catalytic oxidation of toluene.The prepared catalysts were characterized by field emission scanning electron microscopy(FE-SEM),X-ray diffraction(XRD),thermogravimetry(TG)and low-temperature N2 sorption.The results revealed that the catalytic activity of ZIF-8 for toluene oxidation increased with the dispersion of Ce particles on the surface of ZIF-8.Ce0.6Zn0.4 catalyst exhibited excellent catalytic performance in the catalytic combustion of toluene.The temperature of toluene conversion up to 90%was 247℃.The results of material characterizations showed that the size of catalyst particles was not uniform,but the thermal stability was good.
作者
荣超
董鹏越
于晨
昝伟
师传林
廖银念
赵梦奇
黄雪莉
RONG Chao;DONG Pengyue;YU Chen;ZAN Wei;SHI Chuanlin;LIAO Yinnian;ZHAO Mengqi;HUANG Xueli(College of Chemistry&Chemical Engineering,Xinjiang University,Urumqi 830046,China;Key Laboratory of Coal Cleaning Conversion and Chemical Engineering Process of Xinjiang Uyghur Autonomous Region,Xinjiang University,Urumqi 830046,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第2期89-93,共5页
Environmental Science & Technology
基金
国家自然科学基金项目(51408522
51403179)
新疆自治区自然科学基金项目(2015211C284)
新疆大学自然科学基金博士启动基金项目(BS150222)
关键词
铈
ZIF-8
催化氧化
甲苯
cerium
ZIF-8
catalytic oxidation
toluene
