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Fabrication of Au functionalized TiO2 nanofibers for photocatalytic application

Abstract : Pristine titanium dioxide (TiO 2) and gold (Au)-doped TiO 2 (TiO 2-Au) composite nanofibers (NFs) with different Au contents were fabricated by electrospinning. The thermal behavior of the as-spun composite precursor NFs were analyzed and characterized. Photocatalytic reactions were performed with methyl blue (MB) aqueous solution under UV-Vis and different irradiation wavelengths (including 360 nm, 528 nm, and 360 nm and 528 nm together). As a result, the morphology and the structure of TiO 2-Au composite NFs were significantly influenced by calcination temperature, leading to the controllable phase ratio of anatase and rutile in TiO 2. TiO 2-Au composite NFs, with an average diameter of 171 nm containing Au crystals of about 10 nm, exhibited enhanced photocata-lytic efficiency toward the MB, compared to that of commercial P25 (a multiphase TiO 2 98% anatase and 2% rutile). The corresponding degradation level reached 95% after 10 min. When irradiated with light having different wavelengths, the TiO 2-Au composite NFs catalyst had the best performance under 360 nm and 528 nm together, indicating that Au NPs functionalized TiO 2 NFs can enhance the photocatalysis from UV range to visible range. The mechanism of photocatalytic reactions under different irradiations is discussed in the present paper.
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Contributor : Vincent Salles <>
Submitted on : Tuesday, April 27, 2021 - 5:42:55 PM
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Xiaojiao Yang, Vincent Salles, Mathieu Maillard, Yusuf Valentino Kaneti, Minsu Liu, et al.. Fabrication of Au functionalized TiO2 nanofibers for photocatalytic application. Journal of Nanoparticle Research, Springer Verlag, 2019, 21 (7), pp.160. ⟨10.1007/s11051-019-4600-8⟩. ⟨hal-02189449⟩

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