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Visible light photocatalytic water splitting for hydrogen production from N-TiO2 rice grain shaped electrospun nanostructures |
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| Authors: | Veluru Jagadeesh Babu Manippady K. Kumar Appukuttan Sreekumaran Nair Tan Lee Kheng Suleyman I. Allakhverdiev Seeram Ramakrishna |
| Affiliation: | 1. Healthcare and Energy Materials Laboratory, NUS Nanoscience and Nanotechnology Initiative (NUSNNI), National University of Singapore, Singapore 117576, Singapore;2. Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602, Singapore;3. Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia;4. Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia;5. Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore;6. King Saud University,11451 Riyadh, Kingdom of Saudi Arabia |
| Abstract: | We report on the visible light-driven hydrogen production from splitting of water molecules by nitrogen-doped TiO2 (N-TiO2) with a rice grain-like nanostructure morphology. The N-TiO2 nanostructures are prepared using sol-gel and electrospinning methods followed by post-annealing of the composite nanofibers. The nanostructures are characterized by microscopy and spectroscopy. First order rate constants for the visible light-assisted photocatalysis in the degradation of methylene blue (MB) dye are found to be 0.2 × 10−3 and 1.8 × 10−3 min−1 for TiO2 and N-TiO2 (5 wt% of nitrogen), respectively. The N-TiO2 utilized in water splitting experiments and evaluated hydrogen (H2) of 28 and 2 μmol/h for N-TiO2 and TiO2, respectively. The improvement may be attributed due to the N-doping and higher surface area as ∼70 m2/g. |
| Keywords: | Electrospinning Hybrid nanostructures H2 production Photocatalysis |
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