Preparation of Flower-Like Ni Particles by the Water-Ethanol-Ammonia Liquid Phase Synthesis and Thermal Decomposition Method

摘要:

在水-醇-氨液相体系中，沉淀合成了酒石酸镍纳米晶片和花状酒石酸镍颗粒。以花状酒石酸镍颗粒为前驱体，在CO2气氛中，于380和420 °C条件下，通过热分解过程分别制备花状金属镍颗粒。实验样品采用IR，DSC-TG，XRD和SEM测试技术进行分析，测试结果表明：液相沉淀法制备的样品为纯相的酒石酸镍，在1.0 mol的酒石酸镍中含有约2.5 mol的结晶水，花状的酒石酸镍颗粒直径约40 μm，纳米晶片花瓣的厚度约0.1 μm；热分解制备的具有银白光泽的粉体为纯相的具有面心立方结构的金属镍粉，花状金属镍颗粒直径约10 μm，纳米晶片花瓣的厚度约0.3 μm。

Abstract:

Nano sheets and flower-like particles of nickel tartrate were synthesized through water-ethanol-ammonia liquid phase precipitation system. Flower-like particles of metal Ni were prepared by the thermal decomposition process, using flower-like nickel tartrate particles as precursor in an atmosphere of CO2, at temperatures of 380 °C and 420 °C, respectively. The characteristics of products were tested by means of the infrared spectrometer (IR), the differential scanning calorimeter and thermo-gravimetric analyzer (DSC-TG), the X-ray diffraction (XRD), and the scanning electron microscope (SEM). The IR studies indicate that the product is pure hydrated nickel tartrate. The studies of DSC-TG indicated that there are 2.5 moles of H2O in one mole of nickel tartrate. The analysis of XRD indicates that the silvery white powder is pure metal Ni, which has face-centered cubic crystal structure. The SEM images show that the size of the flower-like nickel tartrate particles is approximately 40 μm, and the thickness of the nano-petals is about 0.1 μm. The size of the flower-like metal Ni particles is approximately 10 μm, and thickness of the nano-petals is about 0.3 μm.