Energy dilemmas and environmental degradation have emerged as interconnected challenges that command extensive global attention. Herein, we report an integrated strategy through integrating photocatalysis and biosynthesis for producing single-cell protein (SCP), utilizing carbon dioxide (CO2) as the carbon source. First, Eu-doped NiAl-layered double hydroxides (Eu-NiAl-LDHs) were rationally designed via orbital coupling engineering for photocatalytic-driven CO2 reduction, enabling the effective synthesis of syngas (CO and H2) with tunable composition. Moving downstream to the biosynthetic phase, Hydrogenophaga pseudoflava Z-1107 was strategically utilized to transform the precursor syngas into SCP, with a cell dry weight of 566 mg L–1. This work thus demonstrates a potential route toward a carbon-negative solution of upgrading CO2.
Yin et al. (Fri,) studied this question.