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• W2077962045 abstract "Nanoporous hematite (α-Fe2O3) thin films doped with Ti4+ deposited by spray-pyrolysis were successfully used in photoelectrochemical splitting of water for solar hydrogen production. X-ray diffraction, field emission scanning electron microscopy, UV–visible absorption and photoelectrochemical studies have been performed on the undoped and Ti4+ doped hematite thin films. Morphology of α-Fe2O3 thin films was observed to be nanoporous, with increased porosity (pore size ∼12 to 20 nm) on increasing doping concentration. A significant decrease in the bandgap energy from 1.95 to 1.27 eV was found due to doping. α-Fe2O3 film doped with 0.02 M Ti4+ ions exhibited best solar to hydrogen conversion efficiency (photoconversion efficiency) of 1.38% at 0.5 V/SCE. Highest photocurrent densities of 0.34 mA/cm2 at zero bias and 1.98 mA/cm2 at 0.5 V/SCE were obtained by incorporating 0.02 M Ti4+ in α-Fe2O3, which are significantly larger than earlier reported values. Donor density (30.8 × 1020 cm−3) and flatband potential (−1.01 V/SCE) obtained were also maximum for this sample. Hydrogen collected in 1 hr at Pt electrode with the best photoelectrode was 2.44 mL with 150 mW/cm2 visible light source." @default.
• W2077962045 created "2016-06-24" @default.
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• W2077962045 date "2010-05-01" @default.
• W2077962045 modified "2023-09-30" @default.
• W2077962045 title "Spray pyrolytically deposited nanoporous Ti4+ doped hematite thin films for efficient photoelectrochemical splitting of water" @default.
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• W2077962045 doi "https://doi.org/10.1016/j.ijhydene.2010.01.101" @default.
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