S-doped HTiNbO5 nanosheets：A novel efficient visible-light photocatalyst

doi:10.1016/S1872-2067(12)60692-5

Abstract

Abstract:

S-doped HTiNbO₅ nanosheets were prepared via an exfoliation-flocculation-calcination process using layered HTiNbO₅ as the starting material and thiourea as the S source. The resulting catalyst had higher surface area and visible-light absorption than did unexfoliated HTiNbO₅ or HTiNbO₅ nanosheets. The adsorption and photodegradation of rhodamine B were evaluated under visible-light irradiation on the obtained catalysts. Both HTiNbO₅ nanosheets and S-doped HTiNbO₅ nanosheets showed enhanced adsorption capacity and a high visible-light photodegradation rate. However, a much higher degree of mineralization (41%) was achieved using the S-doped HTiNbO₅ nanosheets, compared with almost no mineralization for the HTiNbO₅ nanosheets, indicating that S doping can effectively improve the photocatalytic activity of nanosheets. The possible photodegradation mechanisms are also discussed.

Key words: Titanoniobate nanosheet, Sulfur doping, Photodegradation, Rhodamine B, Visible light

Lihong Zhang, Chenhui Hu, Liyuan Cheng, Weiping Ding, Wenhua Hou, Jing Chen. S-doped HTiNbO₅ nanosheets：A novel efficient visible-light photocatalyst[J]. Chinese Journal of Catalysis, 2013, 34(11): 2089-2097.

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https://www.cjcatal.com/EN/Y2013/V34/I11/2089

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S-doped HTiNbO₅ nanosheets：A novel efficient visible-light photocatalyst

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