无机材料学报2012，Vol.27Issue(1)：69-73,5.DOI:10.3724/SP.J.1077.2012.00069
以枫叶为模板合成分级多孔氧化铈材料及其催化性能
Hierarchical Porous Ceria Synthesized by Maple Leaf Templates and Its Catalytic Performance
摘要
Abstract
Hierarchical porous ceria with nanocrystalline was successfully synthesized using maple leaf as a bio-template. Unique biomorphic microstructures were characterized by Field Emission Scanning Electron Microscope (FESEM), transmission electron microscope (TEM) and nitrogen absorption-desorption technique. The obtained ceria material shows the repetitious biomimetic structure consisting of the stoma porous about several urn and nanopores with 2-4 nm apertures. The small crystal grain (6-8 nm) and the high specific surface area (64.4 m2/g) of porous CeO2 are detected by wide-angle X-ray diffraction (XRD), high resolution TEM (HRTEM) and the BET method. The catalytic property is evaluated by the oxygen storage/release capacity (OSC). The test confirms that hierarchical porous material possesses more surface active oxygen than nonporous ceria does. While the concentration of acid fuchsine is 40 mg/L, the porous sample has a higher decoloring rate in a shorter time than others. The decoloring rate can reach 100% after decolored for 300 min. The investigation infers that the hierarchical porousceria exhibits better catalytic activity and higher adsorptive capacity in dye wastewater purification due to smallercrystallite size, higher surface area and enhanced OSC.关键词
氧化铈/分级多孔/生物模板/催化活性Key words
ceria/ hierarchical porous/ biotemplate/ catalytic activity分类
化学化工引用本文复制引用
陈丰,陈志刚,钱君超,刘成宝,王炜..以枫叶为模板合成分级多孔氧化铈材料及其催化性能[J].无机材料学报,2012,27(1):69-73,5.基金项目
国家自然科学基金(20771047,21071107) （20771047,21071107）
江苏省油气储运重点实验室项目基金(CY0901) （CY0901）
江苏省研究生科研创新计划(CX10B-256Z) （CX10B-256Z）
苏州市环境功能材料重点实验室(SZS201008) （SZS201008）
苏州市工业支撑项目(SYG201029) （SYG201029）
