Impact of annealing on morphology and thermal stability of Bi2O3 nanotube-based microarchitectures

Authors

  • Hongbing Lu,

    1. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, P.R. China
    2. Key Laboratory of Artificial Micro- and Nanostructures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, P.R. China
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  • Binghai Dong,

    1. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, P.R. China
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  • Shimin Wang,

    1. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, P.R. China
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  • Li Zhao,

    1. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, P.R. China
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  • Zuxun Xu,

    1. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, P.R. China
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  • Li Wan,

    1. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, P.R. China
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  • Jinchai Li

    Corresponding author
    1. Key Laboratory of Artificial Micro- and Nanostructures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, P.R. China
    • Phone: +86 27 6875 2567, Fax: +86 27 6875 2569
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Abstract

Bi2O3 nanostructures with high surface-to-volume ratio are attracting particular interest in catalysis, gas sensors, solar-energy conversion, and so on. In this paper, we present the impact of annealing on morphology, structure, and optical properties of Bi2O3 nanotube-based urchin-like microarchitectures, which is very important to determine before their applications in many potential fields. Our results showed that below 400 °C, the microarchitectures possessed good thermal stability. While annealing at 500 °C, jointed nanoparticles with an average size of 350 nm were formed. On further increasing the annealing temperature to 600 °C, the microarchitectures were transformed into stable α-Bi2O3 microcrystal film with a larger particle size of about 800 nm. The optical bandgaps of the annealed products were also changed according to their changes of morphology and structure.

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