期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 468, 期 -, 页码 176-182出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.01.051
关键词
Water treatment; Oxygen modification; Metal-free catalyst; Graphitic carbon nitride; Photodegradation
资金
- Australian Research Council (ARC) [DP150103026]
- State Key Laboratory of Materials-Oriented Chemical Engineering, China [KL13-02]
Metal-free semiconductors offer a new opportunity for environmental photocatalysis toward a potential breakthrough in high photo efficiency with complete prevention of metal leaching. In this study, graphitic carbon nitride (GCN) modified by oxygen functional groups was synthesized by a hydrothermal treatment of pristine GCN at different temperatures with H2O2. Insights into the emerging characteristics of the modified GCN in photocatalysis were obtained by determining the optical properties, band structure, electrochemical activity and pollutant degradation efficiency. It was found that the introduction of GCN with oxygen functional groups can enhance light absorption and accelerate electron transfer so as to improve the photocatalytic reaction efficiency. The photoinduced reactive radicals and the associated photodegradation were investigated by in situ electron paramagnetic resonance (EPR). The reactive radicals,O-center dot(2)- and (OH)-O-center dot, were responsible for organic degradation. (C) 2016 Elsevier Inc. All rights reserved.
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