Structures and Properties of La0.8Sr0.2MnO3+σ^-z SBA-15(z=0, 1, 2, 4) Perovskite Catalysts
Mesoporous La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite oxides were synthesized via hard-templating with ordered mesoporous silica SBA-15 as the template. The as-prepared samples were characterized by XRD, SEM, AFM, BET, and XPS and the catalytic activity was tested for CO oxidation. The wide-a...
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description | Mesoporous La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite oxides were synthesized via hard-templating with ordered mesoporous silica SBA-15 as the template. The as-prepared samples were characterized by XRD, SEM, AFM, BET, and XPS and the catalytic activity was tested for CO oxidation. The wide-angle XRD patterns showed that La0.8Sr0.2MnO3+σ perovskite was formed. The SEM and AFM analyses exhibited that La0.8Sr0.2MnO3+σ by hard-templating method had much smaller particle size(18 nm) than that(40 nm) by the sol-gel method. The perovskite-type oxides La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) also displayed a higher BET surface area from 70 to 143.7 m^2/g and a disordered mesostructure from nitrogen sorption analysis, as well as a small-angle XRD pattern. Moreover, the La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite exhibited a much higher activity in CO oxidation than the conventional La0.8Sr0.2MnO3+σ perovskite. Further analysis by the means of XPS techniques indicated that the existence of high content of Oads/Olatt species contributed to the high activity. |
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The as-prepared samples were characterized by XRD, SEM, AFM, BET, and XPS and the catalytic activity was tested for CO oxidation. The wide-angle XRD patterns showed that La0.8Sr0.2MnO3+σ perovskite was formed. The SEM and AFM analyses exhibited that La0.8Sr0.2MnO3+σ by hard-templating method had much smaller particle size(18 nm) than that(40 nm) by the sol-gel method. The perovskite-type oxides La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) also displayed a higher BET surface area from 70 to 143.7 m^2/g and a disordered mesostructure from nitrogen sorption analysis, as well as a small-angle XRD pattern. Moreover, the La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite exhibited a much higher activity in CO oxidation than the conventional La0.8Sr0.2MnO3+σ perovskite. 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Materials Science Edition</addtitle><description>Mesoporous La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite oxides were synthesized via hard-templating with ordered mesoporous silica SBA-15 as the template. The as-prepared samples were characterized by XRD, SEM, AFM, BET, and XPS and the catalytic activity was tested for CO oxidation. The wide-angle XRD patterns showed that La0.8Sr0.2MnO3+σ perovskite was formed. The SEM and AFM analyses exhibited that La0.8Sr0.2MnO3+σ by hard-templating method had much smaller particle size(18 nm) than that(40 nm) by the sol-gel method. The perovskite-type oxides La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) also displayed a higher BET surface area from 70 to 143.7 m^2/g and a disordered mesostructure from nitrogen sorption analysis, as well as a small-angle XRD pattern. Moreover, the La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite exhibited a much higher activity in CO oxidation than the conventional La0.8Sr0.2MnO3+σ perovskite. Further analysis by the means of XPS techniques indicated that the existence of high content of Oads/Olatt species contributed to the high activity.</description><subject>SBA-15;催化剂;性质;结构;氧化物;XRD;催化活动;粒子尺寸</subject><issn>1000-2413</issn><issn>1993-0437</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNpjYuA0tLQ01jUwMTZnAbINDAx0jUwMjTkYuIqLswwMTAyMzcw4GRKDS4pKk0tKi1KLFRLzUhQCivILUotKMoHc_DQFn0QDPYvgIgM9I988f-P3e7rPN8fpVikEOznqGpq-39NRZWugo2Coo2Cko2Dyfk-nQkBqUX5ZcXZmSaqCc2JJYk5lcUkxDwNrWmJOcSovlOZmUHJzDXH20E3OyM9LL8zMS48vKMrMTSyqjDczNzE3NDQ2tTQmShEAijdFfw</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>黄学辉;NIU Pengju;LI Ming;LIAO Hui;SHANG Xiaohui</creator><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope></search><sort><creationdate>2018</creationdate><title>Structures and Properties of La0.8Sr0.2MnO3+σ^-z SBA-15(z=0, 1, 2, 4) Perovskite Catalysts</title><author>黄学辉;NIU Pengju;LI Ming;LIAO Hui;SHANG Xiaohui</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-chongqing_primary_6747113593</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>SBA-15;催化剂;性质;结构;氧化物;XRD;催化活动;粒子尺寸</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>黄学辉;NIU Pengju;LI Ming;LIAO Hui;SHANG Xiaohui</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><jtitle>武汉理工大学学报:材料科学英文版</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>黄学辉;NIU Pengju;LI Ming;LIAO Hui;SHANG Xiaohui</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structures and Properties of La0.8Sr0.2MnO3+σ^-z SBA-15(z=0, 1, 2, 4) Perovskite Catalysts</atitle><jtitle>武汉理工大学学报:材料科学英文版</jtitle><addtitle>Journal of Wuhan University of Technology. Materials Science Edition</addtitle><date>2018</date><risdate>2018</risdate><volume>33</volume><issue>1</issue><spage>23</spage><epage>29</epage><pages>23-29</pages><issn>1000-2413</issn><eissn>1993-0437</eissn><abstract>Mesoporous La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite oxides were synthesized via hard-templating with ordered mesoporous silica SBA-15 as the template. The as-prepared samples were characterized by XRD, SEM, AFM, BET, and XPS and the catalytic activity was tested for CO oxidation. The wide-angle XRD patterns showed that La0.8Sr0.2MnO3+σ perovskite was formed. The SEM and AFM analyses exhibited that La0.8Sr0.2MnO3+σ by hard-templating method had much smaller particle size(18 nm) than that(40 nm) by the sol-gel method. The perovskite-type oxides La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) also displayed a higher BET surface area from 70 to 143.7 m^2/g and a disordered mesostructure from nitrogen sorption analysis, as well as a small-angle XRD pattern. Moreover, the La0.8Sr0.2MnO3+σ/z SBA-15(z = 1, 2, 4) perovskite exhibited a much higher activity in CO oxidation than the conventional La0.8Sr0.2MnO3+σ perovskite. Further analysis by the means of XPS techniques indicated that the existence of high content of Oads/Olatt species contributed to the high activity.</abstract></addata></record> |
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source | SpringerLink Journals; Alma/SFX Local Collection |
subjects | SBA-15 催化剂 性质 结构 氧化物 XRD 催化活动 粒子尺寸 |
title | Structures and Properties of La0.8Sr0.2MnO3+σ^-z SBA-15(z=0, 1, 2, 4) Perovskite Catalysts |
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