Progress on Synthesis of CQDs/g-C3N4 Composites and Their Photocatalytic Performance
Graphite carbon nitride(g-C3N4)has great application potential in the new energy development and environmental remediation,but the shortcomings of pure g-C3N4,such as small light absorption range,high crystallinity,high photo-generated carrier recombination rate and few active sites,limit its application range.The introduction of carbon dots(CQDs)to construct composite phase can increase the reactive sites of g-C3N4,accelerate the transfer of surface charges,inhibit the recombination of carriers,and then enhance its photocatalytic activity.The preparation methods and raw material sources of CQDs,the synthesis methods(solvothermal method,calcination method and self-assembly method)of CQDs/g-C3N4 composites and the strategies for improving photocatalytic performance were reviewed.The applications of CQDs/g-C3N4 composites in hydrogen production,pollutant degradation and antibacterial in recent years are described.Finally,the future development direction of CQDs/g-C3N4 composites is prospected.
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