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Rational design of semiconductor molecule structure is of significant importance for achieving the multifunctional photocatalysis. Herein, three end/bay-substituted perylenediimide (PDI) molecules, including bis(Ncarboxymethyl) perylenediimide (H 2 PDI), 1,7-dibromo-substituted H 2 PDI (2Br-H 2 PDI) and 1,6,7,12-tetraethersubstituted H 2 PDI (4CH 3 CH 2 O-H 2 PDI), are synthesized for photocatalytic oxygen evolution (POE) and oxygen reduction reaction (ORR). One-dimensional H 2 PDI nanorods, two-dimensional 2Br-H 2 PDI nanosheets, and zerodimensional 4CH 3 CH 2 O-H 2 PDI nanoparticles are obtained. Under visible light, 4CH 3 CH 2 O-H 2 PDI as photocatalyst (5.31 mmol & sdot; g - 1 & sdot; h - 1 ) exhibits the 1.8-times and 20-times POE rate of 2Br-H 2 PDI (2.93 mmol & sdot; g - 1 & sdot; h - 1 ) and H 2 PDI (0.26 mmol & sdot; g - 1 & sdot; h - 1 ) with AgNO 3 as sacrificial agent. Additionally, the POE rate can be further improved to 9.34 mmol & sdot; g - 1 & sdot; h - 1 with the Co 2+ doping of 4CH 3 CH 2 O-H 2 PDI. With isopropanol as sacrificial agent, the H 2 O 2 evolution rate of 657.4 mu M & sdot; g - 1 & sdot; h - 1 can be also achieved via photocatalytic ORR with 4CH 3 CH 2 O-H 2 PDI as catalyst, which is -3 and -4 times those of 2Br-H 2 PDI (220.8 mu M & sdot; g - 1 & sdot; h - 1 ) and H 2 PDI (160.0 mu M & sdot; g - 1 & sdot; h - 1 ), respectively. Especially, in the O 2 - or air- saturated aqueous solution without sacrificial agent, the H 2 O 2 rate of 273.1 or 112.7 mu M & sdot; g - 1 & sdot; h - 1 can be also achieved. This work provides a promising way to design the PDI-based multifunctional photocatalysts.
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MOLECULAR CATALYSIS
ISSN: 2468-8231
Year: 2024
Volume: 560
3 . 9 0 0
JCR@2023
CAS Journal Grade:3
Cited Count:
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 3
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