| Autor: |
Birla PN; Centre for Materials for Electronics Technology, Off Pashan Road, Panchwati, Pune-411008, India. bbkale1@gmail.com., Arbuj S; Centre for Materials for Electronics Technology, Off Pashan Road, Panchwati, Pune-411008, India. bbkale1@gmail.com., Chauhan R; Department of Environment Science, Savitribai Phule Pune University, Pune-411007, India., Shinde M; Centre for Materials for Electronics Technology, Off Pashan Road, Panchwati, Pune-411008, India. bbkale1@gmail.com., Rane S; Centre for Materials for Electronics Technology, Off Pashan Road, Panchwati, Pune-411008, India. bbkale1@gmail.com., Gosavi S; Department of Environment Science, Savitribai Phule Pune University, Pune-411007, India., Kale B; Centre for Materials for Electronics Technology, Off Pashan Road, Panchwati, Pune-411008, India. bbkale1@gmail.com.; Material Science Department, MITWPU, University Paud Road, Pune 38, India. |
| Abstrakt: |
Herein, Ni-decorated SnO 2 (Ni@SnO 2 ) nanostructures have been synthesized using SnO 2 as a matrix via a simple electroless deposition method for the generation of hydrogen, a potent near-future fuel. XRD analysis confirmed the generation of rutile SnO 2 in Ni@SnO 2 . FESEM and FETEM imaging exhibited the formation of SnO 2 nanoparticles with a size of 10-50 nm, which are deposited with Ni nanoparticles (5-7 nm) and intermittent films (thickness 1-2 nm). The associated EDS elemental mapping validated Ni deposition on the surface of the SnO 2 nanoparticles, further supplemented by FTIR, Raman and XPS analysis. Slight red shifts in the band gaps of the Ni@SnO 2 nanostructures (in the range of 3.53-3.65 eV) compared to the pristine SnO 2 nanoparticles (3.72 eV) were observed. Also, intensity quenching of the band gap and associated defect peaks were observed in PL analysis. The Ni@SnO 2 nanostructures were used as photocatalysts and exhibited proficient hydrogen evolution. Among the samples, the 0.3 wt% Ni@SnO 2 nanostructures showed the greatest hydrogen evolution, i.e. , ∼50 μmol g -1 h -1 under visible light irradiation versus pristine SnO 2 (8.5 μmol g -1 h -1 ) owing to the enhanced density of active sites and effective charge separation. It is noteworthy that the hydrogen evolution is much better as compared to earlier reports of Pt-doped-SnO 2 based materials. |
