Metal-Free Semiconductor-Based Bio-Nano Hybrids for Sustainable CO2 -to-CH4 Conversion with High Quantum Yield.
Angew Chem Int Ed Engl
; 61(35): e202206508, 2022 08 26.
Article
em En
| MEDLINE
| ID: mdl-35713977
ABSTRACT
Bio-nano hybrids with methanogens and nano-semiconductors provide an innovative strategy for solar-driven CO2 -to-CH4 conversion; however, the efficiency mismatch between electron production and utilisation results in low quantum yield and CH4 selectivity. Herein, we report the integration of metal-free polymeric carbon nitrides (CNx ) decorated with cyanamide (NCN) groups and Methanosarcina barkeri (M. b). The self-assembled M. b-NCN CNx exhibited a quantum yield of 50.3 % with 92.3 % CH4 selectivity under illumination, which outperforms other reported bio-nano hybrid systems and photocatalytic systems for CO2 reduction. This excellent performance was attributed to the distinct capacitance and conductive effects of NCN CNx , which promoted electron storage and redistribution at the biotic-abiotic interface to alleviate recombination losses and side reaction. This study provides new design guidelines for bio-nano hybrids for the sustainable photocatalytic reduction of CO2 into fuels.
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Base de dados:
MEDLINE
Assunto principal:
Semicondutores
/
Dióxido de Carbono
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article