阴极等离子体电解法制备氧化铝纳米颗粒

以金属铝为阴极材料,以3mol·L-1浓度的NH4NO3水溶液为电解液,采用非对称电极阴极等离子体电解方法制备出氧化铝纳米颗粒.采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线能量色散谱(EDX)、X射线衍射(XRD)和X射线光电子能谱(XPS)对颗粒的形貌和结构进行了表征.结果表明颗粒以立方相Al2O3为主.还对放电过程的电流变化和发光现象进行了研究.结合实验结果提出了这种颗粒的生长机制.

Fabrication of Al2O3 Nanoparticles by Cathodic Plasma Electrolysis

We used aluminum as the cathodic material and an aqueous solution of 3 mol·L^-1 NH₄NO₃ as the electrolyte in our work. Al₂O₃ nanoparticles were fabricated using asymmetrical electrodes during cathodic plasma electrolysis. The morphology and structure of the particles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray energy dispersion (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). We identified cubic Al₂O₃ as the main component. The changes in current and optical emission phenomena during the cathodic plasma electrolysis were also studied. Based on the experimental results, we discuss the mechanisms responsible for particle formation.