Preparation of ternary Ag/Ag3PO4/g-C3N4 hybrid photocatalysts and their enhanced photocatalytic activity driven by visible light

doi:10.1016/S1872-2067(12)60712-8

Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (1): 78-84.DOI: 10.1016/S1872-2067(12)60712-8

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Preparation of ternary Ag/Ag₃PO₄/g-C₃N₄ hybrid photocatalysts and their enhanced photocatalytic activity driven by visible light

Kai Shen^a, Mohammed Ashraf Gondal^b, Rashid Ghulam Siddique^b, Shan Shi^a, Siqi Wang^a, Jiangbo Sun^a, Qingyu Xu^c

a College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, Jiangsu, China;
b Laser Research Group, Physics Department and Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
c Department of Physics, Southeast University, Nanjing 211189, Jiangsu, China

Received:2013-07-26 Revised:2013-09-10 Online:2013-12-23 Published:2014-01-17
Contact: Kai Shen, Mohammed Ashraf Gondal
Supported by:
This work was supported by the National Natural Science Foundation of China (51172044) and the Project R15-CW-11 (MIT11109, MIT11110) by KFUPM (King Fahd University of Petroleum and Minerals).

Abstract

Abstract:

The preparation of a series of ternary Ag/Ag₃PO₄/g-C₃N₄ hybrid photocatalysts, which display enhanced photocatalytic activity, was reported. The crystal structure, morphology, composition, optical absorption, and efficient separation of charge carriers were studied by X-ray diffraction, scanning electron microscopy, absorption and photoluminescence spectroscopy measurements. Using rhodamine B as a model contaminant, the as-prepared Ag/Ag₃PO₄/g-C₃N₄ hybrid photocatalyst exhibited superior degradation performance under visible light irradiation than Ag₃PO₄ or binary Ag₃PO₄/g-C₃N₄ hybrid photocatalyst systems. The surface plasmon resonance of the 40 nm-silver nanoparticles formed on the surface of Ag₃PO₄ and the heterojunction formed at the interface between Ag₃PO₄ and g-C₃N₄, are considered to be the major physical-chemical origin and to be responsible for the enhanced photocatalytic activity.

Key words: Silver nanoparticle, Silver orthophosphate (Ag₃PO₄), Graphitic carbon nitride (g-C₃N₄), Surface plasmon resonance, Heterojunction structure

Kai Shen, Mohammed Ashraf Gondal, Rashid Ghulam Siddique, Shan Shi, Siqi Wang, Jiangbo Sun, Qingyu Xu. Preparation of ternary Ag/Ag₃PO₄/g-C₃N₄ hybrid photocatalysts and their enhanced photocatalytic activity driven by visible light[J]. Chinese Journal of Catalysis, 2014, 35(1): 78-84.

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Preparation of ternary Ag/Ag₃PO₄/g-C₃N₄ hybrid photocatalysts and their enhanced photocatalytic activity driven by visible light

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