Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 271, Issue -, Pages 150-159Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2014.02.023
Keywords
Graphitic carbon nitride; Ag@AgBr; Plasmonic photocatalysis; Z-scheme
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Funding
- Natural Science Fund Council of China [21173036, 51178092, 51278092, 51238001, 51308097]
- Fundamental Research Funds for the Central Universities [12SSXT148]
- Northeast Normal University Postdoctoral Fund
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A series of Ag@AgBr grafted graphitic carbon nitride (Ag@AgBr/g-C3N4) plasmonic photocatalysts are fabricated through photoreducing AgBr/g-C3N4 hybrids prepared by deposition-precipitation method. The phase and chemical structures, electronic and optical properties as well as morphologies of Ag@AgBr/g-C3N4 heterostructures are well-characterized. Subsequently, the photocatalytic activity of Ag@AgBr/g-C3N4 is evaluated by the degradation of methyl orange (MO) and rhodamin B (RB) under visible-light irradiation. The enhanced photocatalytic activity of Ag@AgBr/g-C3N4 compared with g-C3N4 and Ag@AgBr is obtained and explained in terms of the efficient visible-light utilization efficiency as well as the construction of Z-scheme, which keeps photogenerated electrons and holes with high reduction and oxidation capability, evidenced by photoelectrochemical tests and free radical and hole scavenging experiments. Based on the intermediates identified in the reaction system, the photocatalytic degradation pathway of MO is put forward. (c) 2014 Elsevier B.V. All rights reserved.
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