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材料导报  2021, Vol. 35 Issue (24): 24001-24005    https://doi.org/10.11896/cldb.20090255
  无机非金属及其复合材料 |
溶胶凝胶法合成La0.5Sr0.5Co0.8Mn0.2O3-δ钙钛矿及其催化性质
毛韦达1,2, 赵林1
1 天津大学环境科学与工程学院,天津 300072
2 北京东方园林环境股份有限公司,北京 100015
Sol-gel Synthesis and Catalytic Property of La0.5Sr0.5Co0.8Mn0.2O3-δ Perovskite
MAO Weida1,2, ZHAO Lin1
1 College of Environmental Sciences and Engineering, Tianjin University, Tianjin 300072, China
2 Beijing Orient Landscape Environment Co., Ltd, Beijing 100015, China
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摘要 采用溶胶凝胶煅烧法合成了La0.5Sr0.5Co0.8Mn0.2O3-δ纳米粉,通过X射线衍射、电子显微镜、X射线光电子能谱和碘定量滴定等测试方法对合成物进行了表征,并以四溴双酚A为模型污染物,考察其催化性能。结果表明,合成的纳米 La0.5Sr0.5Co0.8Mn0.2O3-δ具有钙钛矿R-3c结构,平均晶粒尺寸为40～70 nm。与通氮气煅烧的样品相比,弱氧化煅烧样品的非化学计量氧浓度适中,钙钛矿结构中B位离子平均价态相对较稳定,其催化性能较强且相对较稳定,可再生循环使用四次。
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毛韦达
赵林
关键词:  纳米La0.5Sr0.5Co0.8Mn0.2O3-δ  溶胶凝胶煅烧  非化学计量氧  催化性能    
Abstract: The La0.5Sr0.5Co0.8Mn0.2O3-δ nanoparticles were prepared by sol-gel calcinations synthesis. The samples were characterized by means of XRD, electron microscopy, X-ray photoelectron spectroscopy and iodometric titration. Tetrabromobisphenol A was used as model pollutant to investigate its catalytic performance. The results showed that the La0.5Sr0.5Co0.8Mn0.2O3-δ particles had R-3c perovskite structure with an average grain size of 40-70 nm. Compared with the samples calcined under nitrogen, the non-stoichiometric oxygen concentration of the samples calcined by weak oxidation were moderate, the average valence of overall B-site ions in perovskite structure was also relatively stable, and its catalytic performance was therefore strong and relatively stable, which can be recycled for 4 times.
Key words:  nano-scale La0.5Sr0.5Co0.8Mn0.2O3-δ    sol-gel calcinations    non-stoichiometric oxygen    catalytic property
出版日期:  2021-12-25      发布日期:  2021-12-27
ZTFLH:  O614.33  
基金资助: 国家自然科学基金(41728001; 41572237);天津市科技计划项目(18ZXSZSF00240)
通讯作者:  zhaolin@tju.edu.cn   
作者简介:  毛韦达,天津大学,科研助理。2020年毕业于北京化工大学,获得工学硕士学位。主要从事催化材料及环境修复技术研究。赵林,天津大学教授,博士研究生导师,主要从事环境污染控制与修复的研究,先后完成和承担科研项目 30 项,其中:国家重大基础研究前期研究专项 1 项(负责人);国家“863”1 项(副组长);国家科技支撑计划 2项(课题负责人);国家自然基金 7 项(负责人);省、部委级 9 项(7 项为负责人)。获省科技进步奖 3 项。共发表论文 100 余篇,其中 SCI、EI 检索 50 篇,出版专著一部、教材一部,发明专利 40 余件。现为中国化工学会工业水处理专业委员会副主任委员、天津市生态学会副理事长、国际水文地质学家协会会员、美国化学学会会员,天津市生态环境局环境影响评价专家、清洁生产审核师,“Journal of Earth Science Research(JESR)”的编委。
引用本文:    
毛韦达, 赵林. 溶胶凝胶法合成La0.5Sr0.5Co0.8Mn0.2O3-δ钙钛矿及其催化性质[J]. 材料导报, 2021, 35(24): 24001-24005.
MAO Weida, ZHAO Lin. Sol-gel Synthesis and Catalytic Property of La0.5Sr0.5Co0.8Mn0.2O3-δ Perovskite. Materials Reports, 2021, 35(24): 24001-24005.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20090255  或          http://www.mater-rep.com/CN/Y2021/V35/I24/24001
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