摘要
利用低温液相一锅还原法制备了Cu,Cu 2O及Cu 2O/Cu复合物,并用X-射线粉末衍射(XRD)和扫描电子显微镜(SEM)对合成的样品的组成和形貌进行了表征。研究结果表明,强碱性条件容易形成大颗粒Cu 2O,弱碱、低温及低浓度抗坏血酸条件下易形成纳米级小颗粒Cu 2O,而弱碱、高温及高浓度抗坏血酸条件下容易形成微米级大颗粒Cu单质。初步探讨了碱性条件下抗坏血酸还原二价铜(Cu 2+)的可能反应机理。
Cu,Cu2O and Cu2O/Cu composites are prepared by low temperature liquid phase one-pot reduction method.The composition and morphology of the synthesized samples are characterized by X-ray powder diffraction(XRD)and scanning electron microscopy(SEM).The results show that it is very easy to form large particles of Cu2O under strong alkaline conditions,nano-sized small particles of Cu2O under weak alkali,low temperature and low concentration ascorbic acid conditions,and micron-sized large particles of Cu under weak alkali,high temperature and high concentration of ascorbic acid conditions.The possible reaction mechanism of ascorbic acid reducing divalent copper(Cu^2+)under alkaline conditions is preliminarily discussed.
作者
田雪梅
廖洪武
王中华
TIAN Xuemei;LIAO Hongwu;WANG Zhonghua(College of Chemistry and Chemical Engineering,China West Normal University,Nanchong Sichuan 637009,China;Key Laboratory of Chemical Synthesis and Pollution Control ofSichuan Province,China West Normal University,Nanchong Sichuan 637009,China)
出处
《西华师范大学学报（自然科学版）》
2020年第2期185-189,共5页
Journal of China West Normal University(Natural Sciences)
基金
化学合成与污染控制四川省重点实验室开放项目(CSPC2016-3-2)
西华师范大学英才科研基金(17YC034)。
