钙钛矿型La2CuO4亚微米材料的制备及性能研究  

Preparation and Properties of Perovskite-Type La2CuO4 Submicron Materials

作　　者：方俊飞 邓建平 陈正涛[3] FANG Junfei;DENG Jianping;CHEN Zhengtao(School of Energy and Power Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723001,China;School of Physics and Electronic Information Engineering,Shaanxi University of Technology,Hanzhong 723001,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]陕西理工大学机械工程学院,陕西汉中723001 [3]陕西理工大学物理与电信工程学院,陕西汉中723001

出　　处：《重庆理工大学学报（自然科学）》2020年第3期122-127,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(51935901);陕西省教育厅科研计划项目(15JK1115)。

摘　　要：钙钛矿型La2CuO4材料由于具有良好的催化活性和热稳定性,有望取代贵金属成为廉价的催化剂。利用共沉淀法制备出一系列钙钛矿结构的La2CuO4亚微米材料,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、热重分析仪(TG)、X射线光电子能谱仪(XPS)和比表面积分析仪(BET)等技术对La2CuO4材料的晶体结构、微观形貌、元素组成以及比表面积等进行了表征。利用紫外/可见/近红外(UV/Vis/NIR)分光光度计对材料的光吸收性能进行了测试。研究结果表明,所制备的La2CuO4材料均已形成单相钙钛矿结构,材料的颗粒大小均匀,其比表面积约为3.056 m2/g;但随着煅烧温度的升高,材料的颗粒有增大趋势。光谱测试结果表明,La2CuO4材料在整个测试波段都具有较好的光吸收表现,尤其在可见光范围显示出优异的光吸收性能。Perovskite-type La2 CuO4 materials are expected to replace precious metals as cheap catalysts due to their excellent catalytic activity and thermal stability.A series of perovskite-structure La2 CuO4 submicron materials were prepared by using co-precipitation method.The crystal structure,micro-morphology,element composition and specific surface area of the La2 CuO4 materials were characterized by using XRD,SEM,TEM,TG,XPS and BET.The optical absorption properties of the materials were measured by ultraviolet/visible/near infrared(UV/Vis/NIR)spectrophotometer.The results show that the La2 CuO4 materials prepared all have formed single-phase perovskite structure,the size of the materials is uniform,and the specific surface area of them is about 3.056 m2/g.However,with the increase of the calcined temperature,the particle size of the materials has an increasing tendency.The spectral measurements show that the La2 CuO4 materials have good optical absorption performance in the whole test band,especially in visible light range.

关 键 词：LA2CUO4 钙钛矿 亚微米材料 光吸收 

分 类 号：TB34[一般工业技术—材料科学与工程]