S-TiO₂ with enhanced visible-light photocatalytic activity derived from TiS₂ in deionized water

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• 作者：Fang Wang^a ; ^b ; Feng Li^a ; ^b ; Lifang Zhang^a ; Hao Zeng^c ; ^{haozeng@buffalo.edu} ; Yiyang Sun^d ; Shengbai Zhang^d ; Xiaohong Xu^a ; ^b ; ^{xuxh@sxnu.edu.cn}
• 关键词：S-doped TiO2 ; TiS2 ; Visible light ; Photocatalytic ; Low-temperature
• 刊名：Materials Research Bulletin
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：87
• 期：Complete
• 页码：20-26
• 全文大小：2059 K
• 卷排序：87

文摘

Sulfur-doped anatase TiO2 nanoparticles with sulfur atoms occupying oxygen sites were realized by low-temperature hydrothermal oxidation of titanium disulfide (TiS2) with deionized water as the solvent. S doping can effectively narrow the bandgap of TiO2 due to the fact that S 3p level is higher than O 2p orbital. The large surface area caused by this doping method induces higher photocatalytic activity in the visible regime compared with S-TiO2 oxidized at high temperature. The low-temperature hydrothermal oxidation of TiS2 in pH neutral solvent is an environmental-friendly method to obtain S-TiO2 with high photocatalytic activity, which can be extended to other nonmetal doping of TiO2 or other semiconductors for bandgap engineering.