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arXiv · 2202.01368

TiO2 with Super Narrow Bandgap Achieved in One-Step Single-Mode Magnetic Microwave Induced Plasma Treatment

Kunihiko Kato·Yunzi Xin·Takashi Shirai
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Abstract

TiO2 with super narrow bandgap (1.1 eV~) are successfully synthesized via a facile and novel one-step single-mode magnetic microwave induced plasma treatment. The selectively surface Ti3+-doping on obtained TiO2 as trapping centers which significantly restrain the photo-excited carrier recombination and achieve the enhancement of visible-light photocatalytic performance. In addition, the surface chemical composition of TiOx is precisely controlled in a wide region of 1.19 < x < 1.92 during one-step reaction. A detailed XPS analysis reveals that the surface formed Ti3+ shows highly thermal/chemical stability even through high-temperature treatment (~800 oC) in oxidative atmosphere and photocatalytic reaction.

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Kunihiko Kato, Yunzi Xin, Takashi Shirai. 2022-02-03. TiO2 with Super Narrow Bandgap Achieved in One-Step Single-Mode Magnetic Microwave Induced Plasma Treatment. https://doi.org/10.1016/j.scriptamat.2019.10.021

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