N-S共掺杂CN/NS-TiO<sub>2</sub>纳米复合材料的制备及可见光催化性能

doi:10.11896/cldb.22110216

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Abstract The traditional photocatalyst TiO₂ exhibits a poor catalytic effect owing to its wide band gap and very low visible-light-absorption rate. Therefore, to enable its practical application, it is necessary to modify the properties of TiO₂ and improve its photocatalytic performance. In this study, we prepared rectangular TiO₂ nanosheets with a narrow band gap via hydrofluoric acid etching and nitrogen and sulfur doping to obtain NS-TiO₂ and expand its visible-light-response range. NS-TiO₂ and g-C₃N₄ (CN) were successfully combined to form the compound catalyst CN/NS-TiO₂, which possesses a heterojunction structure. The formation of CN/NS-TiO₂ heterojunction structures improves the efficiency of the generation and separation of visible-light-generated electron-hole pairs and facilitates the rapid transfer of charge carriers. CN/NS-TiO₂ exhibits excellent photocatalytic properties for the degradation of rhodamine B under visible light irradiation and excellent stability, and its catalytic activity is 5.06 and 2.03 times as much as TiO₂ and NS-TiO₂, respectively. The structure, morphology, chemical composition, and optical properties of CN/NS-TiO₂ were characterized by various analytical methods, which suggested possible photocatalytic enhancement mechanisms and provided new insights into the extensive synthesis of TiO₂ matrix composites with improved photocatalytic properties.

Key words： titanium dioxide (TiO₂) graphite-phase carbon nitride (g-C₃N₄) N,S doping heterostructure photocatalyst visible photodegradation

Published: Online: 2023-09-06

CLC number:

O643.36

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	QIAN Hongmei
	HONG Tingkai

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QIAN Hongmei,HONG Tingkai. Preparation and Visible-light Photocatalytic Properties of N-S Co-doped CN/NS-TiO₂ Nanocomposites[J]. Materials Reports, 2023, 37(S1): 22110216-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22110216 OR http://www.mater-rep.com/EN/Y2023/V37/IS1/22110216

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