Ni2P-Modified P-Doped Graphitic Carbon Nitride Hetero-Nanostructures for Efficient Photocatalytic Aqueous Cr(VI) Reduction

Targeting heterostructures with modulated electronic structures and efficient charge carrier separation mobility is an effective strategy to improve photocatalytic performance. In this study, we report the synthesis of 2D/3D hybrid comprising P-doped graphitic carbon nitride (g-C3N4) nanosheets (ca. 50–60 nm in lateral size) small-sized Ni2P nanoparticles 10–12 diameter) demonstrate their prominent activity reduction Cr(VI). Utilizing a combination spectroscopic electrochemical characterization techniques, unveil reasons behind distinct photochemical performance these materials. We show that modification P doping g-C3N4 effectively charge-carrier transportation spatial through interface Ni2P/P-doped junctions. As result, catalyst containing 15 wt.% exhibits superior detoxification Cr(VI)-contaminated effluents under UV-visible light illumination, presenting apparent quantum yield (QY) 12.5% at 410 nm, notably without use sacrificial additives. This study marks forward step understanding fabricating cost-effective photocatalysts for applications.