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Here, the donor-acceptor organic composites of n-type perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) and p-type cobalt phthalocyanine (CoPc) semiconductors are firstly synthesized and optimized for photocatalytic oxygen evolution (POE) as catalyst. The POE rate of 12.30 mmol & sdot;g-( 1)& sdot;h(-1) with the apparent quantum yield of 4.00 % at 475 nm can be achieved under visible light (> 420 nm), as compared with 1.58 mmol.g(-1).h(-1) of PTCDA. Under the full UV-Vis light (> 320 nm), the rate is up to 17.65 mmol & sdot;g(- 1)& sdot;h(-1). The systematical ex-periments clearly reveal the generation of dual-channel energy transfer of fluorescence resonance from CoPc to PTCDA and electron transfer from oxygen groups in PTCDA to Co atom in CoPc under UV-Vis light irradiation. Consequently, the formation of Z-scheme p/n heterojunction in CoPc/PTCDA composite greatly enhances the POE performance due to the lifetime increase of metal-ligand charge transfer exciton in CoPc (44.83 vs. 2.95 ps) and perylene cationic exciton (20.13 vs. 2.13 ps).
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APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
ISSN: 0926-3373
Year: 2023
Volume: 342
2 0 . 3
JCR@2023
2 0 . 3 0 0
JCR@2023
JCR Journal Grade:1
CAS Journal Grade:1
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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