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Low temperature synthesis of titanium diboride nanosheets by molten salt–assisted borothermal reduction of TiO2

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Abstract

TiB2 nanosheets were synthesized by the borothermal reduction of TiO2 in flowing argon atmosphere with the assistance of MgCl2. Phase transformation was studied by XRD and micromorphology of products was studied by SEM and TEM. In the experiment, the prepared TiB2 formed the nanoscale lamellar structure. These lamellas agglomerated together to be a net-like structure. Effects of reduction temperature, addition of MgCl2, and its amount were discussed in detail. The results indicated that the presence of MgCl2 accelerated the mass transfer of reactant. Moreover, the co-effects of MgCl2 and B2O3 contributed to the formation of TiB2 nanosheets. TiB2 could dissolve in MgCl2 and B2O3 at high temperature and then recrystallized during the cooling process. The products with a specific surface area of 99.32 m2 g−1 were obtained at 1373 K after reacting for 4 h with a MgCl2:TiO2 molar ratio of 1:1.

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Funding

This work was supported by the National Natural Science Foundation of China (Nos. 51804012 and 51725401).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Ke-Han Wu, Yu Wang, Guo-Hua Zhang, Shu-Qiang Jiao & Kuo-Chih Chou

  2. Peking University Third Hospital, 49 North Gardon Road, Haidian District, Beijing, 100191, People’s Republic of China

    Yu-Jiang

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  1. Ke-Han Wu
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  2. Yu Wang
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Wu, KH., Wang, Y., Yu-Jiang et al. Low temperature synthesis of titanium diboride nanosheets by molten salt–assisted borothermal reduction of TiO2. J Nanopart Res 21, 103 (2019). https://doi.org/10.1007/s11051-019-4560-z

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