摘要
氧化铜是一种重要的p型半导体,在能源科学、环境催化、电子器件等诸多领域皆有广泛应用[1,2]。因此,纳米氧化铜功能材料的可控制备一直受到高度关注。本文通过将硝酸铜与铝粉在碱性条件下水热,制备出一种多孔的氧化铜纳米片。透射电镜显示,所合成的氧化铜为多孔的纳米片单晶,其孔状缺陷为边长在5nm左右的矩形,分布均匀。在高氯酸铵热分解反应中,多孔氧化铜纳米片相较于常规手段制备的氧化铜能够更有效地加速高氯酸铵的热分解,降低其分解温度:在262oC时即可使高氯酸铵发生热解,并在358oC时促使其完全分解为气态物质(图1)。我们认为该样品所兼具的二维纳米结构和缺陷结构能够为高氯酸铵提供高效活化的位点,同时这种特殊的结构也能够作为很好的基底用于构筑更复杂的多级催化体系。
As an important p-type semiconductor,Cu O is widely used in the fields of energy science,environmental catalysis and electronic devices.The preparation of Cu O functional materials with various nanostructures has drawn much attention.In this work,porous Cu O nanosheets were prepared by hydrothermal treatment of Cu nitrates together with metallic aluminum powders under basic solution.TEM results showed that the as prepared Cu O sample was constituted by porous nanosheets with well-distributed rectangular defects.Compared to the routine Cu O,the Cu O nanosheets exhibited better performance in the catalytic AP thermal decomposition.The coexistence of the 2D nano structure and the defects was believed to offer effective sites for the AP activation,and such a special type of structure could be utilized as units in the further construction of complex catalytic systems.
引文
[1]Zhang,Q.B.;Zhang K.L.;Xu,D.G.;Yang,G.C.;Huang,H.;Nie,F.D.;Liu,C.M.;Yang,S.H.Prog.Mater.Sci.2014,60:208.
[2]Dey,K.K.;Kumar,A.;Shanker,R.;Dhawan,A.;Wan,M.;Yadav,R.R.;Srivastava,A.K.RSC Adv.2012,2:1387.