氧化铈空心微球的制备及表征  

Synthesis and characterization of ceria micro hollow spheres

作　　者：邓维钧[1] 张问问 陈亮[1] 胡静[2] 陈东辉[1,3] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]上海应用技术学院香料香精技术与工程学院,上海201418 [3]上海应用技术学院化学与环境工程学院,上海201418

出　　处：《功能材料》2016年第2期2201-2205,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21106084);上海科研创新基金资助项目(14zz164);上海启明星计划资助项目(14QA143300)

摘　　要：通过聚合物模板法和高温煅烧法制备了氧化铈空心微球,并考察了其光催化性能。采用透射电镜(TEM)和扫描电镜(SEM)研究氧化铈空心微球的尺寸和微观形貌,通过傅立叶转换红外线光谱(FTIR),X射线衍射(XRD)和比表面积(BET)表征空心微球、晶型结构、比表面积。结果表明,以粒径为220nm的聚苯乙烯微球可以制得球径约为220nm的CeO_2空心微球。壳层厚度约为20nm。在模拟可见光的条件下,氧化铈空心微球对罗丹名B的降解率在3h内可达到95%以上,表现出优异的光催化降解性能。Cerium(Ⅲ)hydroxide @ polystyrene micro spheres was synthesized via a co-precipitation process with additive of ammonia in a water bath.Cerium(Ⅳ)oxide micro hollow spheres were obtained upon calcination at temperature of 500 ℃ over two hours.The morphology,size,structure,crystallinity and FT-IR spectrum of Cerium(Ⅳ)oxide micro hollow spheres were characterized by scanning electron microscopy,transmission electron microscopy,X-ray diffraction and FT-IR spectrograph.The formation mechanism was discussed.The results show that the diameters of the as-prepeared Cerium(Ⅳ)oxide micro hollow spheres are about220 nm in diameter and 20 nm in shell thickness.The as-prepared samples are uniform,well dispersed and of high purity.TGA,DSC and FT-IR verify that polystyrene was completely decomposed.XRD shows that shell was highly pure and in crystal structure.Photodegradation experiments demonstrate that as-prepared sample has better photocatalytic activity.

关 键 词：模板法 氧化铈 空球 可见光 光催化 

分 类 号：TQ133.3[化学工程—无机化工]