Preparation of Mesoporous Co3O4 Nanoparticles via Solid−Liquid Route and Effects of Calcination Temperature and Textural Parameters on Their Electrochemical Capacitive Beha

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• 作者：Ming-bo Zheng^&#8224 ; ; Jian Cao^&#8224 ; ; Shu-tian Liao ; Jin-song Liu ; Hui-qin Chen ; Yu Zhao ; Wei-jie Dai ; Guang-bin Ji ; Jie-ming Cao* ; Jie Tao
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：March 5, 2009
• 年：2009
• 卷：113
• 期：9
• 页码：3887-3894
• 全文大小：320K
• 年卷期：v.113,no.9(March 5, 2009)
• ISSN：1932-7455

文摘

Mesoporous Co₃O₄ nanoparticles with different textural parameters were prepared by using mesoporous silicas, KIT-6 and SBA-15, as templates and Co(NO₃)₂·6H₂O as precursor via an improved solid−liquid route. The results of N₂ adsorption−desorption analysis indicated that the calcination temperature did not obviously affect the textural parameters of Co₃O₄ samples and the BET surface areas of Co₃O₄ samples could be regulated by different KIT-6 templates. The effects of calcination temperature and textural parameters on the electrochemical capacitive behaviors of Co₃O₄ samples were discussed. The results of electrochemical tests show the following: the capacitance value of the sample decreases slightly with the increase of the calcination temperature; the BET surface area is the crucial factor for the specific capacitance value; for mesoporous materials, large pore size and high ordering degree of mesopore facilitate ion transfer; and the meso-structure (2D hexagonal structure or 3D Ia3d cubic structure) of mesoporous Co₃O₄ nanoparticles does not obviously affect the specific capacitance value of the samples, but 2D hexagonal mesoporous structure is more advantageous to ion transfer than 3D Ia3d cubic mesoporous structure.