摘要
在透射电子显微镜中,利用电子束辐照诱导的方法合成了钼酸锰片状纳米材料。研究发现在电子束辐照前,由于Mn、O等的相对含量不同样品可以分为两类。其中Mn和O含量较低的样品经电子束辐照后的产物为Mn_2Mo_3O_8纳米片和MoO_2纳米颗粒。而Mn和O含量较高的则主要生成六角结构的新相Mn_xMo_3O_8。进一步分析发现,Mn_xMo_3O_8的生成可能是因为样品中Mn相对含量较高,导致Mn、Mo和O原子层堆垛方式发生了改变。同时也初步确定了Mn_xMo_3O_8的晶胞参数为a_(H2)=0.59 nm,c_(H2)=6.24 nm。研究结果不仅提供了利用电子束辐照制备钼酸盐纳米材料的新方法,同时也促进了对钼酸锰材料的认识。
Manganese molybdate nanosheets are synthesized through electron beam (e-beam) irradiation inside a transmission electron microscope. There are two kinds of samples before e-beam irradiation, according to the different contents of Mn and O. After irradiated by the e-beam, Mn2Mo3O8 nanosheets and MoO2 nanoparticles are synthesized through the sample with lower Mn and O contents, while mainly Mn;cMo3O8 with higher Mn and O contents. Furthermore, the generation of the new hexagonal Mn^MojO$ phase can be ascribed to higher Mn content in the initial reactant, which results in the different stacking of Mn, Mo and O atoms. Meanwhile, the lattice parameters of Mn;cMo3O8 is determined to be =0. 59 nm, cH2 =6. 24 nm. The results not only provide a new strategy for the synthesis of molybdate nanomaterials by electron beam irradiation, but also facilitate the understanding of manganese molybdate materials.
出处
《电子显微学报》
CAS
CSCD
2017年第4期328-335,共8页
Journal of Chinese Electron Microscopy Society
基金
国家自然科学基金资助项目(Nos.51671148、51271134、J1210061、11674251、51501132、51601132)
湖北省自然科学基金资助项目(Nos.2016CFB446、2016CFB155)
中央高校基本科研业务费专项基金、高等学校仪器设备和优质资源共享系统(No.CERS-1-26)
中国博士后科学基金资助项目(No.2014T70734)
中南大学轻质高强结构材料国家级重点实验室开放研究基金
苏州科技项目(No.SYG201619)
关键词
钼酸锰
电子束辐照
电子显微学
manganese molybdate
electron beam radiation
electron microscopy