镍酸镧是一种有着广泛应用前景的功能材料．采用固相反应法、分别沉淀法及共沉淀 法制备镍酸镧材料，并对其气敏性质及光催化性能进行研究，结果令人满意．按一定的摩尔比称取镧与镍的硝酸盐，用固相反应法、分别沉淀法及共沉淀法制 备镍酸镧．沉淀剂采用氢氧化钠溶 液，热处理 Lanthanum nickelate is a kind of functional material with a wide range of applications. The solid phase reaction method, the precipitation method and the coprecipitation method were respectively used to prepare lanthanum nickelate materials. The gas sensing properties and photocatalytic properties were studied. The results were satisfactory. According to a certain molar ratio of lanthanum and nickel nitrate, solid phase reaction method, respectively, precipitation and co-precipitation of lanthanum nickelate. Precipitant sodium hydroxide solution, heat treatment