喷雾热解法直接制备微泡中空结构铈锆固溶体的研究
Direct preparation of Cerium Zirconium Solid Solution with Microbubble Hollow Structure by Spray Pyrolysis
王振峰 1赵爽 2伍永福 3黄娟 3刘中兴 4马守营3
作者信息
- 1. 内蒙古科技大学稀土工程技术学院,内蒙古包头 014010;轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古包头 014010
- 2. 轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古包头 014010;内蒙古科技大学能源与环境学院,内蒙古包头 014010
- 3. 内蒙古科技大学能源与环境学院,内蒙古包头 014010;内蒙古科技大 学轻稀土清洁提取与应用内蒙古自治区工程研究中心,内蒙古包头 014010
- 4. 内蒙古科技大学稀土工程技术学院,内蒙古包头 014010;内蒙古科技大 学轻稀土清洁提取与应用内蒙古自治区工程研究中心,内蒙古包头 014010
- 折叠
摘要
利用喷雾热解工艺,以氧氯化锆、稀土萃取分离液氯化铈为原料,柠檬酸为助剂,制备了含碳铈锆复合氧化物前驱体,经二次焙烧后成功制备出低氯且具有中空结构、比表面积为22.8～36.3 m2·g-1的铈锆复合氧化物.对制备出的样品用X射线衍射(XRD)、场发射扫描电镜(FESEM)、透射电镜(TEM)和比表面积分析(BET)进行了表征.FESEM分析结果显示样品的厚度随着柠檬酸摩尔比的增加逐渐变薄.BET分析结果显示样品的比表面积在铈锆-柠檬酸的摩尔比中存在最大值,在摩尔比为1:1.5时比表面积达到最大值,为36.3 m2·g-1左右,制备的微泡中空结构颗粒尺寸在1.1～11.3 μm之间,可为稀土萃取分离液直接制备稀土材料的短流程绿色制备工艺提供参考.
Abstract
Cerium-zirconium solid solution has shown excellent properties in various functional materials,and has become one of the hot spots in the preparation of high-performance materials at present;There are many preparation methods of cerium-zirconium solid solution,and the reported preparation methods have their own ad-vantages and disadvantages.Spray pyrolysis simplifies the preparation process,reduces the cost and is benefi-cial to industrial application.Cerium-zirconium composite oxide precursor containing carbon was prepared by spray pyrolysis with zirconia chloride and cerium chloride as raw materials and citric acid as auxiliary.After sec-ondary calcination,cerium-zirconium composite oxide with low chlorine,hollow structure and specific surface area of 22.8～36.3 m2·g-1 was successfully prepared.The samples were characterized by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM)and specific surface area analysis(BET).The results of FESEM show that the thickness of the samples becomes thinner with the increase of the molar ratio of citric acid.BET analysis results show that the specific surface area of the sample has a maximum value in the molar ratio of cerium-zirconium-citric acid,and reaches the maxi-mum value when the molar ratio is 1∶1.5,which is about 36.3 m2·g-1.The particle size of the prepared micro-bubble hollow structure is between 1.1 and 11.3 μm.
关键词
铈锆固溶体/喷雾热解/微泡中空结构Key words
cerium-zirconium solid solution/spray pyrolysis/microbubble hollow structure引用本文复制引用
基金项目
内蒙古自治区自然科学基金(2019BS05006)
内蒙古自治区自然科学基金(2022LHMS05004)
内蒙古自治区应用技术研究与开发项目(2021GG0103)
内蒙古自治区重大基础研究开放课题(0406091701)
出版年
2024
NETL
NSTL
万方数据