Cu_2O微晶的晶面可控制备及表征

Surface controllable preparation and characterization of Cu_2O microcrystal

以氯化铜和NaOH为原料,葡萄糖为还原剂,聚乙烯吡咯烷酮(PVP)为表面活性剂,液相还原可控制备出Cu2O微晶。利用SEM、XRD等表征手段对其形貌及物相进行分析,研究反应温度、反应时间以及PVP加入量对Cu2O微晶形貌结构的影响机理。得出80℃为最佳反应温度,3 h为最佳反应时间,且随着PVP与铜盐的摩尔比增加,{111}晶面与{100}晶面面积比逐步增大,Cu2O微晶的形貌也呈现出立方体、削角立方体到削角八面体的演化规律。

Different morphologies of Cu2O were controllably prepared, with copper chloride and NaOH as raw materials, glucose as the reducing agent, polyvinylpyrrolidone （PVP） as the surfactant. The morphologies were presented by SEM and the phases were analyzed by XRD. The reaction conditions such as temperature, time and the amount of PVP, which cause different morphologies were studied. It is concluded that 80 ℃ is the best reaction temperature, 3 h is the best reaction time, and with the increase of the molar ratio of PVP and salt, the area ratio of {111 } surface to {100} surface increases and the morphology of Cu2O microcrystalline can realize the transition of the cube, the truncated cube and the truncated octahedron.