形貌可控Co_3O_4颗粒的制备及表征
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摘要
本文以Co Cl_2·6H_2O为原料,采用水热法制备了不同形貌的Co_3O_4颗粒,以X射线衍射仪(XRD)、红外光谱仪(FT-IR)、N_2吸附脱附曲线、扫描电子显微镜(SEM)对样品进行了表征。XRD结果表明,煅烧温度高时,样品的析晶较好;红外光谱表明有Co-O键振动吸收峰;N_2吸附脱附曲线为Ⅱ类等温线,比表面积可达到51.96 m~2/g;扫描电镜表明,Na OH用量较大时样品被刻蚀,PVP的用量较大时,样品会发生一定的团聚。
The different size and shape Co_3 O_4 particles are successfully prepared using Co Cl_2·6 H_2 O as raw material by means of hydrothermal method. The phase compositions of as-prepared Co_3 O_4 were characterized using X-ray diffractometer( XRD),infrared spectroscopy( FT-IR) and scanning electron microscope( SEM). Main pore characteristeristics of the samples were analyzed with nitrogen adsorption. The results of XRD revealed that the capacity of the Co_3O_4 crystallization was intensifying with the increasing calcination temperature. The results of the FT-IR indicates that the Co_3O_4 contains Co-O stretching. The results of the FT-IR indicates that the Co_3O_4 contains vibration absorption. The typical N_2 adsorption desorption isotherm of the samples had a typeⅡ isotherm and BET reached to 51. 96 m~2/g. It was observed from the SEM results that the size and shape of the synthesized Co_3O_4 particles could be controlled by the amount of Na OH and PVP.
The different size and shape Co_3 O_4 particles are successfully prepared using Co Cl_2·6 H_2 O as raw material by means of hydrothermal method. The phase compositions of as-prepared Co_3 O_4 were characterized using X-ray diffractometer( XRD),infrared spectroscopy( FT-IR) and scanning electron microscope( SEM). Main pore characteristeristics of the samples were analyzed with nitrogen adsorption. The results of XRD revealed that the capacity of the Co_3O_4 crystallization was intensifying with the increasing calcination temperature. The results of the FT-IR indicates that the Co_3O_4 contains Co-O stretching. The results of the FT-IR indicates that the Co_3O_4 contains vibration absorption. The typical N_2 adsorption desorption isotherm of the samples had a typeⅡ isotherm and BET reached to 51. 96 m~2/g. It was observed from the SEM results that the size and shape of the synthesized Co_3O_4 particles could be controlled by the amount of Na OH and PVP.
引文
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[2]黄可龙,刘人生.形貌可控的四氧化三钴溶剂热合成及反应机理[J].物理化学学报,2007(5):655-658.
[3]A Askarinejad,M Bagherzadeh,A Morsali.Catalytic performance of Mn3O4and Co3O4nanocrystals prepared by sonochemical method in epoxidation of styrene and cyclooctene[J].Appl.Surf.Sci,2010(256):6678-6682.
[4]郑远川,李兆乾,徐娟,等.四氧化三钴@碳化蝶翅的制备及催化高氯酸铵分解的性能[J].含能材料,2016(3):256-260.
[5]黄颖彬,张敏,柳鹏,等.氧还原和析氧反应的双功能电催化剂——氮磷共掺碳负载四氧化三钴[J].催化学报,2016(8):1249-1256.
[6]H.Y Liang,J.M.Raitano,L.H.Zhang,et al.Controlled synthesis of Co3O4nanopolyhedrons and nanosheets at low temperature[J].Chem.Commun,2009:7569-7571.
[7]王海宁,潘伯广,孙昭,等.聚多巴胺功能化的四氧化三钴纳米复合材料的制备及电催化性能[J].无机化学学报,2016(8):1441-1448.
[8]R Xu,H C Zeng.Self-generation of tiered surfactant superstructures for one-pot synthesis of Co3O4nanocubes and their close and non close packed organizations[J].Langmuir,2004(20):978-979.
[9]傅晓燕,梅军,刘昊,等.碳气凝胶/四氧化三钴复合材料的制备及电化学性能[J].功能材料,2015(6):6115-6119.
[10]王治伟,刘雨溪,杨涛,等.四氧化三钴负载金钯纳米催化剂催化消除甲苯和邻二甲苯[J].催化学报,2017(2):207-216.
[11]胡文丽,邢宏龙,胡晓伶,等.多壁碳纳米管/四氧化三钴复合材料的微波吸收性能研究[J].化工新型材料,2017(3):66-68.