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以氧化石墨和醋酸铜为前驱体,采用一缩二乙二醇为溶剂和还原剂,制备了不同尺寸的Cu_2O纳米颗粒负载于石墨烯的Cu_2O/石墨烯复合材料。研究了加入蒸馏水后保持时间的不同对Cu_2O颗粒尺寸的影响。结果表明:随着保持时间的延长,负载于石墨烯的Cu_2O颗粒尺寸逐渐变小;当保持时间为30min或更长时间时,Cu_2O颗粒的尺寸减小到4nm,并且不再减小。由此提出了Cu_2O纳米颗粒在石墨烯表面异相成核的生长机理,并采用过饱和度解释了不同尺寸Cu_2O纳米颗粒在石墨烯表面的形成过程。
Using graphite oxide and cupric acetate as precursors, diethylene glycol was used as solvent and reductant to prepare Cu_2O / graphene composites with different sizes of Cu_2O nanoparticles supported on graphene. The effect of the different retention time after the addition of distilled water on the particle size of Cu 2 O was investigated. The results show that the particle size of Cu 2 O supported on graphene decreases with the increase of holding time. When the holding time is 30 min or longer, the size of Cu 2 O particles decreases to 4 nm and no longer decreases. Thus, the growth mechanism of heterogeneous nucleation of Cu 2 O nanoparticles on graphene surface was proposed and the formation process of Cu 2 O nanoparticles with different sizes on graphene surface was explained by supersaturation.