Preparation of Ti3+/C/N-TiO2＠NGQDs Nanocomposite Photocatalyst and Its Visible Light Catalytic Performance

被引：0

作者：

Tang, Xinde ^{[1
]}

Liu, Shuilin ^{[1
]}

Wu, Suyun ^{[1
]}

Liu, Ning ^{[1
]}

Zhang, Chunyan ^{[1
]}

Gong, Shenggao ^{[1
]}

机构：

[1] School of Chemical and Environmental Engineering, Hunan Institute of Technology, Hunan, Hengyang

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 23期

关键词：

Ti[!sup]3+[!/sup]N and B co-doped TiO[!sub]2[!/sub]NGQ Ds; visible light; wastewater treatment;

D O I：

10.11896/cldb.23090142

中图分类号：

学科分类号：

摘要：

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. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

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