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Highly Efficient Photocatalysts Based on Lamellar-Shaped Bi₂S₃ Grown on TiO₂ Monolith

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

College of Chemistry and Molecular Engineering, Zhengzhou University, Henan Province, P. R. China

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

International Joint Laboratory of Henan Photoelectric, Functional Materials, P. R. China

Department of Physics and Institute of Basic Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon 16419, Gyeonggi-do, Republic of Korea

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Huiming Wang

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

College of Chemistry and Molecular Engineering, Zhengzhou University, Henan Province, P. R. China

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Yalan Zhou

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

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Lixin Zhao

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

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Jimin Du

http://orcid.org/0000-0001-8162-9617

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

Henan Province Key Laboratory of New Opto-Electronic, Functional Materials, P. R. China

International Joint Laboratory of Henan Photoelectric, Functional Materials, P. R. China

E-mail Address: djm@iccas.ac.cn

Corresponding author.

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Yating Gao

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

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Weimin Wang

School of Chemistry and Chemical Engineering, Anyang Normal University, Henan Province, P. R. China

Henan Province Key Laboratory of New Opto-Electronic, Functional Materials, P. R. China

International Joint Laboratory of Henan Photoelectric, Functional Materials, P. R. China

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, and

Dae Joon Kang

International Joint Laboratory of Henan Photoelectric, Functional Materials, P. R. China

Department of Physics and Institute of Basic Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon 16419, Gyeonggi-do, Republic of Korea

E-mail Address: djkang@skku.edu

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https://doi.org/10.1142/S1793292018501102Cited by:3 (Source: Crossref)

Abstract

Here, the lamellar-shaped Bi₂S₃ grown on a porous TiO₂ monolith was obtained by a two-step method including a sol–gel route and hydrothermal treatment. The photocatalytic activity of the as-synthesized Bi₂S₃/TiO₂ composites was evaluated for photodegradation of methylene blue (MB) dye in aqueous solution under the visible-light irradiation. Based on our experimental results, 5% (molar ratio of Bi₂S₃ to TiO $_{2})$ $_{2})$ Bi₂S₃/TiO₂ photocatalysts exhibited a maximum photodegradation rate of MB up to 96.9% under visible-light irradiation for 120 min. Our findings indicated that the lamellar-shaped Bi₂S₃ can extend the light absorption up to visible areas, and porous TiO₂ can provide enhanced specific surface area and more mass transfer pathway to enhance the photodegradation efficiency. Furthermore, porous TiO₂ can accept the electrons from the Bi₂S₃ conduction band due to the relatively positive electrode potential to impede the photoproduced electron and hole combination to result in advanced photocatalytic performance.

Keywords:

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