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Fabrication of core–shell structured TiO2@Sb–SnO2 with improved electroconductivity

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Abstract

TiO2 can be integrated with antimony-doped tin oxide to obtain composite materials with high electroconductivity. Based on this, spherical TiO2@Sb–SnO2 (TSS) has been prepared by homogeneous precipitation combined with a high-temperature calcination process. The morphology, structure and composition of TSS were characterized by scanning electron microscope, Brunauer–Emmet–Teller surface area analyzer, X-ray diffractometer and transmission electron microscope with energy-dispersive X-ray spectrometer, respectively. Effects of dropping conditions, introducing sulfate, pH value, calcination temperature and holding time on the conductivity of TSS were investigated by measuring resistivity, Zeta potential and particle size, meanwhile the calcination action and conductive mechanism by thermogravimetric analysis, X-ray photoelectron spectroscopy and electron spin resonance. The results revealed that the core–shell structured TSS was formed, and the resistivity of composite powder was below 4.0 Ω cm under the optimum conditions. Our analysis indicates that the conductive channel mechanism is the main conductive mechanism of the as-prepared composite.

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Acknowledgements

This work was financially supported by National Natural Science Foundation of China (No. 21878024) and Innovation Team Project of Liaoning Province (Nos. LT2015001 and 2018479-14).

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Authors and Affiliations

  1. Liaoning Province Key Laboratory for Functional Compounds Synthesis and Application, College of Chemistry and Chemical Engineering, Bohai University, Jinzhou, 121013, China

    Yanan Wang, Jinjuan Xing, Jiasheng Xu, Lin Liu & Kunyi Ma

  2. School of Petrochemical Engineering, College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, 113001, China

    Jianhua Qian

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  1. Yanan Wang
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Correspondence to Jianhua Qian.

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Wang, Y., Qian, J., Xing, J. et al. Fabrication of core–shell structured TiO2@Sb–SnO2 with improved electroconductivity. J Mater Sci 55, 3871–3883 (2020). https://doi.org/10.1007/s10853-019-04229-6

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