Simultaneous Photocatalytic Formation of Hydrogen and Benzaldehyde in Aqueous–Acetonitrile Solutions of Benzyl Alcohol with the Participation of Crystalline Carbon Nitride Doped with Oxygen
摘要
Samples of oxygen-doped crystalline carbon nitride were synthesized by a two-step ionothermal method. The obtained materials were characterized by scanning electron microscopy, X-ray diffraction, spectrophotometry, and luminescence and IR spectroscopy. has almost no effect on the morphology and crystal structure of samples, but it leads to an increase in the absorption intensity in the visible range of the spectrum and luminescence quenching. The synthesized materials exhibit high photocatalytic activity in the simultaneous production of hydrogen and benzaldehyde upon irradiation of benzyl alcohol solutions in a water/acetonitrile mixture. The apparent quantum yields of benzaldehyde and hydrogen formation under optimal conditions reach Φ ≈ 80% at λirr = 405 nm.