Facile synthesis of S-doped reduced TiO2-x with enhanced visible-light photocatalytic performance

doi:10.1016/S1872-2067(17)62825-0

Abstract

Abstract:

A different approach to synthesize visible-light-active sulfur (S)-doped reduced titania (S-TiO_2-x) using thiourea dioxide as both the S source and reductant was developed. The structure, morphology, and optical and electronic properties of the as-prepared S-TiO_2-x samples were examined by multiple techniques, such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, Brunauer-Emmett-Teller and photocurrent measurements, and electrochemical impedance spectroscopy. The photocatalytic activity of S-TiO_2-x was evaluated by photodegradation of organic Rhodamine B under visible-light irradiation. The degradation rate of Rhodamine B by S-TiO_2-x obtained by calcination was about 31, 2.5, and 3.6 times higher than those of pure TiO₂, pristine TiO_2-x, and S-doped TiO₂, respectively. In addition, the as-prepared S-TiO_2-x exhibited long-term stable photocatalytic performance in the degradation of Rhodamine B under visible-light illumination. This report reveals a new approach to prepare stable and highly efficient solar light-driven photocatalysts for water purification.

Key words: Ti³⁺ self-doped, Titania, Sulfur doped, Thiourea dioxide, Visible light photocatalysis

Zhenyu Huang, Zhenggang Gao, Shanmin Gao, Qingyao Wang, Zeyan Wang, Baibiao Huang, Ying Dai. Facile synthesis of S-doped reduced TiO_2-x with enhanced visible-light photocatalytic performance[J]. Chinese Journal of Catalysis, 2017, 38(5): 821-830.

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Facile synthesis of S-doped reduced TiO_2-x with enhanced visible-light photocatalytic performance

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