Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 4, Pages 5575-5581Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.12.042
Keywords
Graphitic carbon nitride; Noble metal; Photocatalytic; Coordination; in-situ
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Funding
- National Natural Science Foundation of China [51102116, 51103065, 51372103]
- Natural Science Foundation of Jiangsu Province [BK2011480]
- China Scholarship Council [201408320022]
- Jiangsu Province [Surencaiban[2015]26]
- Jiangsu Overseas Research AMP
- Training Program for University Prominent Young AMP
- Middle-Aged Teachers
- Specialized Research Fund for Cultivating Academic Leader of Jiangsu University, China
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The incorporation of noble metals into semiconductors has been proven to be effective for the construction of highly efficient composite photocatalytic systems. In this work, the Ag/graphitic carbon nitride (g-C3N4) composite was in-situ fabricated by combining the coordination driven assembly of precursors and calcination process. The interactions between precursors favor the formation of well-defined rod-like Ag-containing complex intermediates, the subsequent annealing of the obtained intermediates produces the Ag/g-C3N4 composite catalysts with improved photodegradation of rhodamine B (RhB). Although the composite differs in the morphology and nitrogen-containing precursor, the role of generated Ag component in the Ag/g-C3N4 composite is considered to be crucial for the enhancement both in light-harvesting ability and photocatalytic activity owing to its unique surface plasmonic effects. Holes and radicals trapping experiments imply that photo-induced active holes and superoxide radicals are predominant under visible light irradiation and make major contributions to improved photocatalytic performance. The finding provides an opportunity to design and in-situ synthesize noble metal-doped semiconductor heterojunctions for potential applications in photocatalysis, photovoltaic and photoelectronic devices. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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