Flowerlike Copper(II)-Based Coordination Polymers Particles: Rapid Room-Temperature Fabrication, Influencing Factors, and Transformation toward CuO Microstructures with Good Catalytic Activity for the Reduction of 4-Nitrophenol
作者:Yue Ma、Yonghong Ni、Fan Guo、Nannan Xiang
DOI:10.1021/acs.cgd.5b00003
日期:2015.5.6
A facile and environment-friendly approach for synthesis of flowerlike copper-based coordination polymer particles (CPPs) was reported. Copper acetate (CuAc2) and sodium pyridine-2,3-dicarboxylate (2,3-Na2PDC) were used as the initial reactants. The flowerlike Cu-PDC microstructures were obtained based on a simple direct precipitation between CuAc2 and 2,3-Na2PDC in a mixed solution of water and methanol with the volume ratio of 20:10 at room temperature. The as-obtained products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR), and elemental analysis. Some factors to affect the morphology and size of the Cu-PDC microstructures were systematically investigated such as the molar ratio of reactants, the volume ratio of water/methanol, acetic groups, and the reaction time. It was found that flowerlike Cu-PDC microstructures could be transformed into flowerlike CuO microstructures by heat-treating in air at 350 °C for 30 min. Experiments showed that the as-obtained flowerlike CuO microstructure exhibited a high catalytic activity for the reduction of 4-nitrophenol in excess NaBH4 solution.
报道了一种简便且环保的方法用于合成花状铜基配位聚合物颗粒(CPPs)。以醋酸铜(CuAc2)和吡啶-2,3-二羧酸钠(2,3-Na2PDC)为初始反应物,在室温下,通过CuAc2和2,3-Na2PDC在体积比为20:10的水和甲醇混合溶液中的简单直接沉淀反应,获得了花状Cu-PDC微结构。利用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、热重分析(TGA)、傅里叶变换红外(FTIR)和元素分析对所得产物进行了表征。系统研究了影响Cu-PDC微结构形貌和大小的若干因素,如反应物的摩尔比、水/甲醇的体积比、醋酸基团和反应时间。研究发现,通过在空气中350 °C下加热处理30分钟,可以将花状Cu-PDC微结构转变为花状CuO微结构。实验表明,所得的花状CuO微结构表现出对过量NaBH4溶液中4-硝基苯酚还原的高催化活性。