Synthesis of a Visible-Light Active TiO2−xSx Photocatalyst by Means of Mechanochemical Doping

Authors

  • Qiwu Zhang,

    1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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      Member, American Ceramic Society.

  • Jun Wang,

    1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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  • Shu Yin,

    1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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  • Tsugio Sato,

    1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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      Member, American Ceramic Society.

  • Fumio Saito

    1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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  • P. Grouma—contributing editor

Abstract

A visible-light active TiO2−xSx in rutile structure has been synthesized by means of a mechanochemical method. The method is composed of two steps: the first is grinding the mixture of sulfur and TiO2, and the second is calcining the ground sample at 673 K in an inert gas flow. XPS analysis confirms that sulfur has been successfully doped into TiO2. The calcined sample under irradiation of visible light with wave-length over 510 nm has shown good performance for NO gas destruction, suggesting its high photograph-reactivity.

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