A Full-Spectrum Porphyrin-Fullerene D-A Supramolecular Photocatalyst with Giant Built-In Electric Field for Efficient Hydrogen Production.
Jun YangJianfang JingYongfa ZhuPublished in: Advanced materials (Deerfield Beach, Fla.) (2021)
A full-spectrum (300-850 nm) responsive donor-acceptor (D-A) supramolecular photocatalyst tetraphenylporphinesulfonate/fullerene (TPPS/C60 ) is successfully constructed. The theoretical spectral efficiency of TPPS/C60 is as high as 70%, offering the possibility of full-solar-spectrum light harvesting. The TPPS/C60 performs a highly efficient photocatalytic H2 evolution rate of 276.55 µmol h-1 (34.57 mmol g-1 h-1 ), surpassing many reported organic photocatalysts. The D-A structure effectively promotes electron transfer from TPPS to C60 , which is beneficial to the photocatalytic reaction. Specifically, a giant internal electric field in the D-A structure is built via the enhanced molecular dipole, which dramatically promotes the charge separation (CS) efficiency by 2.35 times. Transient absorption spectra results show a long-lived CS state TPPS•+ -C60 •- in the D-A structure, which effectively promotes participation of photogenerated electrons in the reduction reaction. Briefly, this work provides a novel approach for designing high-performance photocatalytic materials via enhancing the interfacial electric field.
Keyphrases
- highly efficient
- visible light
- electron transfer
- energy transfer
- solar cells
- photodynamic therapy
- physical activity
- water soluble
- optical coherence tomography
- wastewater treatment
- drug delivery
- magnetic resonance imaging
- reduced graphene oxide
- computed tomography
- single molecule
- magnetic resonance
- cerebral ischemia
- contrast enhanced