Preparation of Silver Modified Mixed Crystal TiO2 by Hydrothermal Method and Its Photocatalytic Performance

Abstract

Abstract: The three-phase mixed crystal TiO₂of anatase, rutile and brookite was prepared by hydrothermal method, and modified with Ag. The crystal structure, morphology and optical property of samples were investigated by XRD, SEM, TEM, PL and DRS. The results show that the prepared TiO₂ exhibits a three-phase mixed crystal structure of anatase/rutile/brookite. After Ag modification, the content of rutile increases, and the content of anatase and brookite decrease. Ag element exists in the form of elemental Ag and AgCl. Ag@TiO₂ heterostructure is more favorable to the transfer of photoinduced charges and improves the photocatalytic activity. After illumination 90 min, the degradation rate of tetracycline hydrochloride (TC) by Ag modified TiO₂ increases from 78.5% to 91.6%.

Key words: TiO₂, three-phase mixed structure, hydrothermal method, Ag modification, photocatalytic activity, tetracycline hydrochloride

CLC Number:

ZHU Li, XIA Yangwen, HE Lili, ZHU Xiaodong. Preparation of Silver Modified Mixed Crystal TiO₂ by Hydrothermal Method and Its Photocatalytic Performance[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2022, 51(4): 673-678.

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Preparation of Silver Modified Mixed Crystal TiO₂ by Hydrothermal Method and Its Photocatalytic Performance

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