Efficient visible light photocatalysis enabled by the interaction between dual cooperative defect sites

Rongjie Qi, Pengfei Yu, Jiachen Zhang, Weiqi Guo, Yaoyu He, Hajime Hojo, Hisahiro Einaga, Qun Zhang, Xiaosong Liu, Zhi Jiang, Wenfeng Shangguan

研究成果: Contribution to journalArticle

抜粋

Modifying photocatalyst with defects offers effective pathway to tailor light absorption properties, but may result in more sluggish kinetics. Therefore, enhanced light absorption often could not guarantee increased activity. Here, we report a dual defect strategy to extend light absorption with minimal loss in charge dynamics. Fine-tuned amount of dual defect, i.e., nitrogen defects and single-site copper, is simultaneously generated in polymer carbon nitride(PCN) through in-situ vapor diffusion method. Surface nitrogen defect extends the light absorption to long-wavelength via sub-band absorption. The interaction between nitrogen and single-site copper at certain concentration retains the charge dynamics by making the photogenerated electrons more delocalized through the newly-formed copper-nitrogen bonds. As a result, champion modified PCN exhibits robust hydrogen production activity, roughly 4.5-fold greater than the pristine counterpart in both visible and full light ranges. More intriguingly, this synergism provides PCN with efficient visible light activity even in faint tailing optical absorption region(>450 nm).

元の言語英語
記事番号119099
ジャーナルApplied Catalysis B: Environmental
274
DOI
出版物ステータス出版済み - 1 1 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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