Hollow InVO₄ Microspheres toward Promoting Photocatalytic CO₂ Conversion Performance

The photocatalytic reduction of CO₂ into valuable chemical fuels represents a promising approach to addressing global energy demands and climate change. In this study, InVO₄-based catalysts were synthesized, and their CO₂ reduction performance was evaluated in a solid-gas phase system. The InVO₄ hollow microspheres demonstrated significantly higher average production rates of CO and CH₄ compared to the InVO₄ solid microsphere and InVO₄ SSR. The superior activity stems from the hollow structure, which enhances CO₂ adsorption and light harvesting via internal scattering. Its shell of tightly packed nanoparticles further facilitates charge transfer and suppresses recombination, collectively increasing electron availability and accelerating CO₂ reduction kinetics.