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Lattice Defects Engineering in W-, Zr-doped $BiVO_{4}$ by Flame Spray Pyrolysis: Enhancing Photocatalytic $O_{2}$ Evolution
| Content Provider | MDPI |
|---|---|
| Author | Stathi, Panagiota Solakidou, Maria Deligiannakis, Yiannis |
| Copyright Year | 2021 |
| Description | A flame spray pyrolysis (FSP) method has been developed, for controlled doping of BiVO4 nanoparticles with W and Zr in tandem with the oxygen vacancies (Vo) of the BiVO4 lattice. Based on XPS and Raman data, we show that the nanolattice of W-BiVO4 and Zr-BiO4 can be controlled to achieve optimal O2 evolution from H2O photocatalysis. A synergistic effect is found between the W- and Zr-doping level in correlation with the Vo-concentration. FSP- made W-BiVO4 show optimal photocatalytic O2-production from H2O, up to 1020 μmol/(g×h) for 5%W-BiVO4, while the best performing Zr-doped achieved 970 μmol/(g×h) for 5%Zr-BiVO4. Higher W- or Zr-doping resulted in deterioration in photocatalytic O2-production from H2O. Thus, engineering of FSP-made BiVO4 nanoparticles by precise control of the lattice and doping-level, allows significant enhancement of the photocatalytic O2-evolution efficiency. Technology-wise, the present work demonstrates that flame spray pyrolysis as an inherently scalable technology, allows precise control of the BiVO4 nanolattice, to achieve significant improvement of its photocatalytic efficiency. |
| Starting Page | 501 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11020501 |
| Journal | Nanomaterials |
| Issue Number | 2 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-02-16 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Coatings and Films Bivo4 W-doping Zr-doping Flame Spray Pyrolysis Oxygen Vacancies Defects Raman Xps Photocatalysis Water Splitting |
| Content Type | Text |
| Resource Type | Article |
