Improved photocatalytic activity of Ag2S quantum dots decorated TiO2 nanotubes under visible light

被引：6

作者：

Rawat, Jyoti ^{[1
]}

Sharma, Himani ^{[2
]}

Dwivedi, Charu ^{[1
]}

机构：

[1] Doon Univ, Sch Phys Sci, Dept Chem, Dehra Dun, Uttarakhand, India

[2] Doon Univ, Sch Phys Sci, Dept Phys, Dehra Dun, India

来源：

JOURNAL OF MATERIALS RESEARCH | 2024年 / 39卷 / 9期

关键词：

Ag2S quantum dots; Methylene blue; Photocatalytic degradation; TiO2; nanotube; Titanium dioxide; Visible light; HYDROTHERMAL SYNTHESIS; CATALYTIC-ACTIVITY; NANOROD ARRAYS; NANOPARTICLES; NANOCOMPOSITES; DEGRADATION; NANOCRYSTALS; PERFORMANCE; SILVER;

D O I：

10.1557/s43578-024-01313-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, Ag2S quantum dots (QDs) are successfully synthesized through a wet chemical method. Additionally, a hydrothermal method is employed to prepare Ag2S QDs decorated TiO2 nanotubes (Ag2S@TNT) from Ag2S decorated TiO2 (Ag2S@TiO2). Furthermore, fluorescence spectroscopy (FL) is conducted to observe a substantial quantum confinement effect induced by Ag2S QDs. The average particle size of Ag2S@TNT is measured as 0.53 nm, as depicted in the high-resolution transmission electron microscopy (HR-TEM) images. The Brunauer-Emmett-Teller (BET) surface area analysis technique is utilized to assess the pore volume and surface area of the synthesized material. The electrochemical impedance spectra (EIS) analysis revealed that Ag2S@TNT exhibited the smallest arc radius, signifying superior transfer and separation efficiency for photo-excited carriers compared to other samples. The photocatalytic degradation study demonstrates that Ag2S@TNT exhibits impressive photocatalytic activity and stability in the presence of methylene blue (MB) as the target organic pollutant under simulated visible light.

引用

页码：1344 / 1357

页数：14

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