碳辅助法制备Mn_3O_4纳米颗粒  

Preparation of Mn_3O_4 Nanoparticles by the Carbon-Assisted Method

作　　者：杜建功[1] 海振银 李艳芳[1] 崔丹凤[1] 

机构地区：[1]中北大学电子测试技术重点实验室,太原030051

出　　处：《微纳电子技术》2016年第9期610-615,共6页Micronanoelectronic Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2015AA04600);2015年度中北大学科学研究基金资助项目(204-110246)

摘　　要：以脱脂棉为碳源,氯化锰为前驱物,采用碳辅助法制备了粒径约为65 nm的Mn3O4纳米颗粒。通过透射电镜（TEM）和高倍透射电镜（HRTEM）对制备样品的形貌、粒径及晶面的结构特性进行了分析;通过X射线衍射（XRD）表征,分别对不同煅烧温度（400-600℃）下样品的物相、晶粒度进行了研究,表明500℃为Mn3O4纳米颗粒的最佳制备温度;X射线光电子能谱（XPS）表征表明制备的Mn3O4表面存在碳元素,N2吸附-脱附曲线测试结果表明Mn3O4纳米颗粒具有较大的比表面积。另外,通过紫外-可见光（UV-vis）吸收表征表明,在一定的波长范围内该Mn3O4纳米颗粒的可见光吸收能力明显增强,有利于提升其光解水制氢能力。Using the degreasing cotton as the carbon source and manganese chloride as the precursor,Mn3O4 nanoparticles with the diameter of about 65 nm were prepared by the carbon-assisted method.By the transmission electron microscopy（TEM）and high-resolution transmission electron microscopy（HRTEM）,the morphology,particle size and lattice plane structure characteristics of the samples were analyzed.The phases and particle size of the samples obtained at different calcination temperatures（400-600 ℃）were characterized by the X-ray diffraction（XRD）.The result shows that the optimal preparation temperature of the Mn3O4 nanoparticles is 500℃.The X-ray photoelectron spectroscopy（XPS）characterization results indicate that there is carbon element on the prepared Mn3O4 surface.The N2adsorption-desorption curve test results show that the Mn3O4 nanoparticles have a larger specific surface area.In addition,the UV-vis absorption characterization indicates that the visible light absorption ability of the Mn3O4 nanoparticles is obviously enhanced in a certain wavelength range,benefiting the hydrogen production from photocatalytic water splitting.

关 键 词：四氧化三锰 脱脂棉 碳辅助法 光催化:氢气 

分 类 号：TB383[一般工业技术—材料科学与工程]