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An Efficient Metal-Free Photocatalytic System with Enhanced Activity for NADH Regeneration
- Source :
- Industrial & Engineering Chemistry Research; December 2019, Vol. 58 Issue: 51 p23567-23573, 7p
- Publication Year :
- 2019
-
Abstract
- Photocatalysis is a green and sustainable technique for converting solar energy into energy-storage molecules. A novel type of metal-free photocatalyst consisting of polydopamine (PDA) surface-functionalized graphitic carbon nitride (g-C3N4) was fabricated to enable the highly efficient visible-light-driven photocatalytic production of reduced nicotinamide adenine dinucleotide (NADH) through the photomediated reduction of NAD+. The photocatalytic performance and kinetic processes were investigated to evaluate the efficiency of NADH regeneration by the PDA/g-C3N4photocatalysts. It was shown that the PDA layer thus formed could promote the charge carrier transfer of g-C3N4to increase the solar-to-chemical conversion efficiency under visible light irradiation. A photocurrent density three times higher than that of pristine g-C3N4was obtained. The photocatalytic activity of the PDA/g-C3N4photocatalysts appeared to be dependent on the pH, with an increase in the pH from 3.0 to 9.5 substantially enhanced the NADH yield. The 20 wt % PDA/g-C3N4exhibited remarkably improved photocatalytic NADH regeneration efficiency, achieving an NADH yield of 94.7% with an initial reaction rate of 2.4 mmol·h–1·g–1, which is approximately six times higher than that of pristine g-C3N4. Our study thus identifies a promising photocatalyst for enhancing the photocatalytic efficiency for nicotinamide cofactor regeneration.
Details
- Language :
- English
- ISSN :
- 08885885 and 15205045
- Volume :
- 58
- Issue :
- 51
- Database :
- Supplemental Index
- Journal :
- Industrial & Engineering Chemistry Research
- Publication Type :
- Periodical
- Accession number :
- ejs51703396
- Full Text :
- https://doi.org/10.1021/acs.iecr.9b05038