Solid-Solution-Like o-C3N4/Ag2SO4 Nanocomposite as a Direct Z-Scheme Photocatalytic System for Photosynthesis of Active Oxygen Species

摘要: Efficient photosynthesis of active oxygen species (e.g., •OH, •O2–, and H2O2) is cardinal significance for environmental science biochemistry. We report a system o-C3N4/Ag2SO4 with solid-solution-like structure synthesized by coordinating the 5s orbit Ag+ surface 2p lone electrons o-C3N4. The as-synthesized demonstrates unique electronic structure, as illuminated high light absorption, perfect redox potentials, large BET specific area, abundant sites, efficient interfacial charge transfer. Electron paramagnetic resonance spectra Mott–Schottky measurements confirm that photocatalysts demonstrate highly activity yielding H2O2 Z-scheme photocatalytic principle. Experimental DFT calculation reveal transferred on conduction band (CB) made up Ag were favorably shifted into valence (VB) composed N formed coordination under irradiation, greatly pr...