不同形貌Co3O4和NiO的可控合成及光学性质

采用沉淀法,选择不同的钴盐和镍盐,以草酸为沉淀剂,磷酸三钠作为形貌导向剂,分别合成了具有特殊形貌的四氧化三钴和氧化镍。并对样品进行了微观结构、形貌和光学性质的表征。结果表明:在磷酸三钠的辅助下,四氧化三钴的晶体生长沿一维方向发展,氧化镍的晶体生长沿二维方向发展。紫外光谱测试表明,磷酸三钠参与下得到的四氧化三钴和氧化镍的禁带宽均增加。

Shape Controlled Synthesis and Optical Property of Co3O4 and NiO

Cobalt oxide and nickel oxide with a special morphology were synthesized by precipitation method, in those process, oxalic acid was used as the precipitating agent, trisodium phosphate as a morphology directing agent, different cobalt salts and nickel salts supported Co²⁺ and Ni²⁺ to form Co₃O₄ and NiO. The products were characterized by XRD, SEM and UV-Vis spectrum. The results show that in the aid of trisodium phosphate, the crystal growth of Co₃O₄ is along the one-dimensional direction, while nickel oxide is along dimensional direction. The band gap of cobalt oxide and nickel oxide which is obtained with the help of Na₃PO₄ has increased than those of obtained without Na₃PO₄.