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A new approach to prepare highly active and stable black titania for visible light-assisted hydrogen production
- A new approach to prepare highly active and stable black titania for visible light-assisted hydrogen production
- Sinhamahapatra, Apurba; Jeon, Jong-Pil; Yu, Jong-Sung
- DGIST Authors
- Yu, Jong-Sung
- Issue Date
- Energy and Environmental Science, 8(12), 3539-3544
- Article Type
- Catalysis; Catalyst; Charge Recombinations; Electromagnetic Wave Absorption; Energy Gap; Hydrogen; Hydrogen Production; Hydrogen Production Rate; Light; Light Absorption; Light Intensity; Magnesiothermic Reduction; Oxygen Vacancies; Photo-Catalytic Activities; Recombination Centers; Reduction; Solar Power Generation; Surface Defects; Synergistic Effect; Titanium; Titanium Dioxide; Visible-Light Absorption; Visible Spectrum; Wavelength Ranges
- In spite of their remarkable enhancement in visible light absorption, black TiO2 materials have failed to demonstrate expected photocatalytic activity in visible light due to the presence of a high number of recombination centers. In this report, a new controlled magnesiothermic reduction has been developed to synthesize reduced black TiO2 under a 5% H2/Ar atmosphere. The material possesses an optimum band gap and band position, oxygen vacancies, surface defects, and charge recombination centers and shows significantly improved optical absorption in the visible and infrared region. The synergistic effects enable the black TiO2 material to show an excellent hydrogen production ability in the methanol-water system in the presence of Pt as a co-catalyst. The maximum hydrogen production rates are 43 mmol h-1 g-1 and 440 μmol h-1 g-1, along with remarkable stability under the full solar wavelength range of light and visible light, respectively, and these values are superior to those of previously reported black TiO2 materials. © 2015 The Royal Society of Chemistry.
- Royal Society of Chemistry
- Related Researcher
Light, Salts and Water Research Group
Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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- Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles
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