Ag Loading Enhanced Photocatalytic Activity of g-C3N4 Porous Nanosheets for Decomposition of Organic Pollutants

Frontiers in Chemistry

Kun Zheng¹  Shu-yuan Liu²  Ruidan Wang³  Yubo Xie³  Yi Li³  Kezhen Qi⁴  Zhe Chen⁵ 

[1] Department of Hydrogen Energy, Faculty of Energy and Fuels, AGH University of Science and Technology, Kraków, Poland;Department of pharmacology, Shenyang Medical College, Shenyang, China;Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, China;Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, China;School of Material Science and Technology, Jilin Institute of Chemical Technology, Jilin City, China;

关键词: Ag nanoparticles;    Ag/g-C3N4;    photocatalytic activity;    organic pollutant;    electron-hole separation;    modification;   

DOI  :  10.3389/fchem.2019.00091

来源: DOAJ

【 摘 要 】

The g-C3N4 porous nanosheets with different loading amount of Ag nanoparticles (NPs) are successfully prepared by a simple liquid-phase reduction method. These Ag/g-C3N4 composites have an improved photocatalytic performance for decomposing organic pollutants compared with that of pure g-C3N4 nanosheets. Many measurements have been used for characterizing the samples, such as XRD, FTIR, UV-Vis DRS, PL, XPS, EDS, SEM, and TEM. In Ag/g-C3N4, the Ag NPs are uniformly coated on the g-C3N4 surface, the diameter is mainly in the range of 8~18 nanometers. Loading of Ag NPs expand the response to the visible light for g-C3N4 and increasing the producing rate of photogenerated e−-h+ pairs. The loading of silver NPs obviously enhances the photocatalytic activity of C3N4 nanosheets toward the Rhodamine B (RhB) decomposition under the simulated sunlight irradiation. With different loading amounts of Ag NPs, Ag/g-C3N4 (3 wt% of Ag) showed the highest photocatalytic activity for RhB decomposition among these as-prepared samples, which is 10 times of the rate of pure C3N4. Based on the experimental results, a possible photocatalytic mechanism for Ag/g-C3N4 is proposed.

【 授权许可】

Unknown