Improved Proton Adsorption and Charge Separation on Cadmium Sulfides for Photocatalytic Hydrogen Production

Cadmium sulfide has attracted wide attention in photocatalytic hydrogen production, due to its appropriate bandgap and band positions. However, high-rate photogenerated electron–hole recombination few active sites on CdS lead low activity. Herein, a PANI/NCPP/CdS (PANI/NiCoP/NiCoPi/CdS) hybrid as noble metal-free visible light-driven photocatalyst is reported, with metal phosphides, phosphates, polyaniline (PANI) reduction oxidation cocatalysts, respectively. This not only facilitates the charge separation transfer owing formation of heterojunction, but also improves local concentration H+ surface catalysts protonated amine groups PANI, beneficial evolution reaction. As result, as-prepared could show high rate 170.3 mmol g−1 h−1 an apparent quantum efficiency 41.37% at 420 nm, representing one best performances all-CdS-based photocatalysts.