Optimizing photocatalytic water oxidation by FeMnOx bimetallic cocatalyst on Zn-doped BiVO4 via magnetron sputter deposition.
KHAN, Niqab; KÖCHE, Ariadne; KHAN, Wahidullah; NOGUEIRA, Pallas Athena Miyake; JAMIL, Asif; PIEPER, Yvonne; TOMA, Francesca Maria; NASCIMENTO, Otaciro Rangel; GONÇALVES, Renato Vitalino; KHAN, Sherdil.
KHAN, Niqab; KÖCHE, Ariadne; KHAN, Wahidullah; NOGUEIRA, Pallas Athena Miyake; JAMIL, Asif; PIEPER, Yvonne; TOMA, Francesca Maria; NASCIMENTO, Otaciro Rangel; GONÇALVES, Renato Vitalino; KHAN, Sherdil.
Abstract: Bismuth vanadate (BiVO4) has been used as an efficient photocatalyst for water oxidation. However, pristine BiVO4 suffers from recombination due to its short hole diffusion length and fast electron-hole recombination, which hinders photocatalytic water oxidation. To enhance the water photo-oxidation, here we constructed Zn-doped BiVO4 and then deposited bimetallic FeMnOx on its surface via Magnetron Sputtering. Zn doping improved the optical absorption by red-shifting the bandgap of BiVO4. Crystalloghafically, it increased growth towards (040) direction and enhanced V-O bond lengths. Moreover, the Zn doping induces oxygen vacancies that suppress charge recombination, as confirmed by EPR analysis. Zn-doped BiVO4 showed an incredible enhancement in the photocatalytic O2 evolution of 135 µmol as compared to the pure BiVO4 (90 µmol). The O2 evolution was further enhanced to 154 µmol after loading bimetallic FeMnOx cocatalysts on Zn-doped BiVO4, which is attributed to the improved charge transportation via cocatalysts from the BiVO4 surface.
@article={003253242,author = {KHAN, Niqab; KÖCHE, Ariadne; KHAN, Wahidullah; NOGUEIRA, Pallas Athena Miyake; JAMIL, Asif; PIEPER, Yvonne; TOMA, Francesca Maria; NASCIMENTO, Otaciro Rangel; GONÇALVES, Renato Vitalino; KHAN, Sherdil.},title={Optimizing photocatalytic water oxidation by FeMnOx bimetallic cocatalyst on Zn-doped BiVO4 via magnetron sputter deposition},journal={Applied Catalysis A},note={v. 704, p. 120389-1-120389-10 + supplementary material},year={2025}}