Controlled synthesis of Ce(OH)CO_3 flowers by a hydrothermal method and their thermal conversion to CeO_2 flowers

查看全文 作　　者：Dongen [1,2]Zhang;Feng [3]Li;Jian [1]Gu;Qing [1]Xie;Shanzhong [1]Li;Xiaobo [1]Zhang;Guiquan [1]Han;Ailing [1]Ying;Zhiwei [1,2]Tong

机构地区：[1]Department of Chemical Engineering,Huaihai Institute of Technology;[2]SORST,Japan Science and Technology Agency(JST),Japan;[3]College of Chemistry,China University of Mining and Technology

出　　处：《Particuology》索引2012年第10卷第6期,共6页

基　　金：supported by a Grant-in-aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS);the CREST program of the Japan Science and Technology Agency(JST);the National Natural Science Foundation of China(No. 50873042,21001048);,the Natural Science Foundation of Jiangsu Province(No.BK2009650);the High School Science Research Key Project of Jiangsu Province(11KJA430008);the High School Science Research Project of Jiangsu Province(No.11KJB150002);'Qing Lan Project' of the universities and colleges in Jiangsu Province 摘　　要：Highly uniform Ce(OH)CO3 flowers were successfully prepared in large quantities using a facile hydrothermal approach from the reaction of Ce(NH4)(NO3)4 with CO(NH2)2 at 160 ℃ in a water-N 2H4 complex.The influences of the N2H4 content and temperature on flower formation were discussed.CeO2 flowers were prepared by thermal conversion of Ce(OH)CO3 flowers at 500℃ in air.Both Ce(OH)CO3 and CeO2 flowers were characterized by X-ray powder diffraction(XRD),and scanning electron microscopy(SEM).The UV-vis adsorption spectrum of the CeO2 flowers showed that the band gap energy(Eg) is 2.66 eV,which is lower than that of bulk ceria. 关键词：CEO2 二氧化铈水热法控制合成 UV-Vis吸收光谱热转化 CO(NH2)2 X射线粉末衍射

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Controlled synthesis of Ce(OH)CO_3 flowers by a hydrothermal method and their thermal conversion to CeO_2 flowers

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