Fabrication and characterisation of Magneli phase Ti 4 O 7 nanoparticles

Micro & nano letters

article

Xiaoyan Zhang¹  Ying Liu¹  Jinwen Ye¹  Ruijie Zhu¹ 

[1] School of Materials Science and Engineering, Sichuan University;Key Laboratory of Advanced Special Material and Technology, Ministry of Education

关键词: adsorption;    electron diffraction;    heat treatment;    infrared spectra;    nanofabrication;    nanoparticles;    nitrogen;    reduction (chemical);    reflectivity;    scanning electron microscopy;    titanium compounds;    transmission electron microscopy;    ultraviolet spectra;    visible spectra;    X-ray diffraction;    magneli phase nanoparticles;    hydrogen atmospheres;    reduction temperature;    time effect;    heating;    X-ray diffraction;    XRD;    scanning electron microscopy;    transmission electron microscopy;    selected area electron diffraction;    single-crystal structure;    nitrogen adsorption;    BET surface area;    UV-visible diffuse reflectance spectra;    absorption band;    visible-light wavelengths;    near-infrared region;    size 200 nm to 500 nm;    temperature 850 degC;    time 5 h;    Ti4O7;    N2;   

DOI  :  10.1049/mnl.2012.0963

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Pure Magneli phase Ti 4 O 7 nanoparticles with diameters of 200–500 nm were successfully synthesised under hydrogen atmospheres. In this reported work, the influences of reduction of temperature and time on the reduced phases were investigated, and it is shown that pure Ti 4 O 7 can be obtained by heating at 850°C for 5 h. The as-prepared materials are characterised by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and the corresponding selected area electron diffraction indicates the single-crystal structure, which is also consistent with the XRD results. N 2 absorption (Brunauer-Emmett-Teller surface area) was also conducted on this material, the surface area being 8.351 m 2 /g. UV–vis diffuse reflectance spectra of the nanoparticles exhibited absorption beyond 325 nm, meanwhile, there is an absorption band that covers the visible-light wavelengths and extends into the near-infrared region.

【 授权许可】

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