Porous InO Hollow Tube Infused with g-CN for CO Photocatalytic Reduction.

Converting CO into energy-rich fuels by using solar energy is a sustainable solution that promotes a carbon-neutral economy and mitigates our reliance on fossil fuels. However, affordable and efficient CO conversion remains an ongoing challenge. Here, we introduce polymeric g-CN into the pores of a hollow InO microtube. This architecture results in a compact and staggered arrangement between g-CN and InO components with an increased contact interface for improved charge separation. The hollow interior further contributes to strengthening light absorption. The resulting g-CN-InO hollow tubes exhibit superior activity (274 μmol·g·h) toward CO to CO conversion in comparison with those of pure InO and g-CN (5.5 and 93.6 μmol·g·h, respectively), underlining the role of integrating g-CN and InO in this advanced system. This work offers a strategy for the advanced design and preparation of hollow heterostructures for optimizing CO adsorption and conversion by integrating inorganic and organic semiconductors.