Ti<sup>3+</sup>/C/N-TiO<sub>2</sub>@NGQDs纳米复合光催化剂的制备及其可见光催化性能研究

doi:10.11896/cldb.23090142

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Abstract Ti³⁺, C, and N co-doped TiO₂@ nitrogen doped graphene quantum dots (Ti³⁺/C/N-TiO₂@NGQDs) nanocomposite photocatalyst was prepared by a two-step hydrothermal method and characterized in detail by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-visible diffuse reflectance spectroscopy, and its visible photocatalytic performance was studied by degrading methyl orange solution. The results showed that TiO₂ was successfully co-doped with Ti³⁺, C, and N, and nano NGQDs adhered to the co-doped TiO₂. The first-order kinetic rate constant for degradation of methyl orange by Ti³⁺/C/N-TiO₂@NGQDs was 25.7 times, 4.7 times, and 1.7 times that of pure TiO₂, C/N-TiO₂, and C/N-TiO₂@NGQDs, respectively. The enhanced visible light catalytic performance was attributed to its stronger visible light absorption and faster photoinduced charge transfer and separation efficiency. Superoxide radicals and photogenerated holes were key active substances during methyl orange degradation by Ti³⁺/C/N-TiO₂@NGQDs composite photocatalysts. In addition, Ti³⁺/C/N-TiO₂@NGQDs had very high stability. This TiO₂-based composite photocatalyst will have practical applications for wastewater treatment.

Key words： Ti³⁺,N,and B co-doped TiO₂ NGQDs wastewater treatment visible light

Published: 10 December 2024 Online: 2024-12-10

CLC number:

O643

Fund:Hunan Provincial Natural Science Foundation of China (2021JJ50084, 2023JJ50113) and the Research Foundation of Education Bureau of Hunan Province, China (19A119, 22A0631) .

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	Articles by authors
	TANG Xinde
	LIU Shuilin
	WU Suyun
	LIU Ning
	ZHANG Chunyan
	GONG Shenggao

Cite this article:

TANG Xinde,LIU Shuilin,WU Suyun, et al. Preparation of Ti³⁺/C/N-TiO₂@NGQDs Nanocomposite Photocatalyst and Its Visible Light Catalytic Performance[J]. Materials Reports, 2024, 38(23): 23090142-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23090142 OR http://www.mater-rep.com/EN/Y2024/V38/I23/23090142

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