China Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System

Guangzhou, China

China Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System

Guangzhou, China
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Chen D.,South China Normal University | Fang J.,South China Normal University | Fang J.,China Guangdong Technology Research Center for Ecological Management and Remediation of Urban Water System | Lu S.,U.S. Center for Disease Control and Prevention | And 7 more authors.
Applied Surface Science | Year: 2017

A novel efficient Bi modified Bi2S3 pillared g-C3N4 (BBC) plasmonic semiconductor photocatalyst has been successfully developed in a mixed solvothermal environment. The photocatalytic abilities of the as-prepared samples are examined by the photocatalytic reduction of Cr(VI) and oxidation of tetracycline (TC). And the chemical composition, structure, morphology and photo-absorption properties of the photocatalysts have been investigated by XRD, FT-IR, XPS, TEM, HRTEM and DRS methods, respectively. It is found that the addition of triethanolamine (TEA) results in the formation of the pillared-g-C3N4 (PG) nanostructure. The agglomeration of g-C3N4 nanosheets moiety and Bi2S3 nanorods moiety can be both hindered effectively by the special PG structure. And the photocatalytic results indicate that BBC exhibits the best photoreduction and photooxidation performances among all the samples, and meanwhile possesses superior photo-stability during the recycling runs. The enhanced photocatalytic activity of BBC could be ascribed to the furtherance of charge separation, localized surface plasma resonance (SPR) effect of metallic Bi and the excellent reaction interface. Finally, a tentative mechanism of BBC for photocatalytic reduction of Cr(VI) and oxidation of TC is discussed in detail. © 2017 Elsevier B.V.

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