Constructing S-scheme charge separation in cobalt phthalocyanine/oxygen-doped g-C₃N₄ heterojunction with enhanced photothermal-assisted photocatalytic H₂ evolution AITranslate

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DOI：

Chinese Library Classification Number:O643.36[理学—物理化学];O644.1[理学—物理化学];TQ116.2[化学工程—无机化工]

Citation Information:

Hydrogen acquisition from solar energy is an effective way to address energy crisis,which makes the development of efficient photocatalysts become the main direction of scientific research.Herein,cobalt phthalocyanine/oxygen-doped g-C₃N₄(CoPc/OCN) S-scheme heterojunction photocatalyst was designed by coupling multi-step calcination with solvothermal method for enhanced photothermal-assisted photocatalytic H₂ evolution.The multistep calcined g-C₃N₄ is easier for O-doping formation,and the ethanol solvothermal strategy is utilized to enhance the dispersion of CoPc on OCN nano sheet surface and forms sufficient S-scheme heterojunction through H-bonds.In addition,the active sites and excellent photothermal properties of CoPc itself further improve the integrated photocatalytic activity of CoPc/OCN S-scheme heterojunction.The optimal photocatalytic hydrogen evolution rate of CoPc/OCN S-scheme heterojunction photocatalyst reached 9.56 mmol·g^-1·h^-1,which is 2.69 and 1.23 times higher than that of CN and OCN,respectively.This work provides a valuable design idea and scheme for enhancing the multi-factor co-assisted photocatalytic H₂ evolution performance.