Synthesis of biomorphic hierarchical CeO_2 microtube with enhanced catalytic activity  

生物形态的层次CeO_2微管的合成及其催化活性的增强（英文）

作　　者：Jing-jing HUANG Chen-cheng WANG Lu-tian JIN Feng CHEN Zhi-gang CHEN 黄晶晶;王陈程;金璐甜;陈丰;陈志刚(苏州科技学院材料化学与生物工程学院,苏州215009;苏州科技学院江苏省环境功能材料重点实验室,苏州215009)

机构地区：[1]School of Chemistry, Biology and Materials Engineering,Suzhou University of Science and Technology, Suzhou 215009, China [2]Jiangsu Key Laboratory for Environment Functional Materials,Suzhou University of Science and Technology, Suzhou 215009, China

出　　处：《Transactions of Nonferrous Metals Society of China》2017年第3期578-583,共6页中国有色金属学报（英文版）

基　　金：Projects(21277094,51478285,21407111) supported by the National Natural Science Foundation of China;Projects(BK20140280,BK20151198) supported by the Natural Science Foundation of Jiangsu Province,China;Project(14KJA430004) supported by Collegiate Natural Science Fund of Jiangsu Province,China;Project supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD),China;Project supported by Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment,China;Project supported Excellent Innovation Team in Science and Technology of Education Department of Jiangsu Province,China;Projects(SJHG1304,SJHG1310,SJHG1404) supported by the Jiangsu Key Laboratory for Environment Functional Materials,China

摘　　要：A biomorphic CeO2microtube with multiple-pore structure was fabricated by using the cotton as biotemplate,throughcerium nitrate solution infiltration and thermal decomposition.Field emission scanning electron microscope(FESEM),powder X-raydiffraction(XRD),transmission electron microscope(TEM),N2adsorption?desorption isotherms,temperature-programmedreduction(TPR)and CO oxidation were used to characterize the samples.The results indicated that the synthesized products werecomposed of crystallites with grain size about9nm and exhibited a fibrous morphology similar to the original template andpossessed a specific surface area(BET)of62.3m2/g.Compared with the conventional CeO2particles,the synthesized materialsshowed a superior catalytic activity for CO oxidation.For the synthesized fibrous CeO2,the CO conversion at320°C was above90%and a100%CO conversion was obtained at410°C.以棉花为模板、经硝酸铈溶液浸渍后煅烧,合成多孔结构的生物形态二氧化铈微管材料。采用场发射扫描电子显微镜(FESEM)、X射线衍射(XRD)、透射电子显微镜(TEM)、N_2吸脱附程序升温还原(TPR)和CO氧化等手段对样品进行表征。结果表明,合成的材料是由尺寸约9 nm的晶粒组成,复制出原模板的纤维形貌,比表面积(BET)为62.3 m^2/g。与传统CeO_2微粒相比,在CO氧化实验中,所合成的材料表现出极高的催化活性。所合成的纤维状CeO_2在320°C下CO的转化率约为90%,在410°C下CO的转化率达到100%。

关 键 词：synthesis BIOTEMPLATE multiple-pore structure CERIA catalytic performance 

分 类 号：O643.36[理学—物理化学]