Recent progress of microstructure-regulated g-C3N4 in photocatalytic NO conversion: The pivotal roles of adsorption/activation sites

Abstract

Photocatalytic nitric oxide (NO) conversion technology has the characteristics of high efficiency, economy, and environment friendly to remove NO using g-C₃N₄. Introducing new adsorption sites on the surface of g-C₃N₄ through microstructure control can alter the structure-activity relationship between g-C₃N₄ and gas molecules, thereby improving photocatalytic NO conversion activity and inhibiting NO₂ generation. However, few review articles have focused on the microscopic effects of microstructural changes in g-C₃N₄ based materials on the adsorption and activation of NO and O₂. This has important guiding significance for material design work in the field of NO conversion and strategies to fundamentally improve NO conversion activity and selectivity. Therefore, our work systematically summarizes the strategy of introducing adsorption and activation sites through microstructure control, and emphasizes the role of these sites in the photocatalytic NO conversion process. The aim is to clarify the influence of adsorption and activation sites on adsorption behavior and the correlation between these sites and reaction paths. Finally, the development trend and future prospects of increasing the level of g-C₃N₄ adsorption and activation in the field of photocatalytic NO conversion are introduced, which is expected to provide an important reference for the development and practical application of g-C₃N₄-based photocatalytic materials.