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IMAGE: Photocatalytic process of phosphorus and nitrogen co-doped carbon quantum dots (PNCQDs)/TiO2 nanosheets. Due to the quantum wells created by synergy between N and P elements, photogenerated electrons can be localized...
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Credit: Authors
In a paper published in
NANO, researchers from Nanjing Tech University proposed a theory which attributes the photocatalytic efficiency enhancement of Phosphorus and Nitrogen co-doped CQDs (PNCQDs)/TiO
2 nanosheets composite photocatalyst to the quantum wells of PNCQDs.
Doped carbon quantum dots (CQDs) have been popular nanomaterials to enhance the performance of composite semiconductor photocatalyst in recent years, since their excellent optical and electronic characteristics. In the field of fluorescence, it is commonly known that double element co-doping can effectively increase the quantum yield of CQDs because of the synergy between doping elements, but the specific mechanism is still unclear.