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A new approach to prepare highly active and stable black titania for visible light-assisted hydrogen production

Title
A new approach to prepare highly active and stable black titania for visible light-assisted hydrogen production
Authors
Sinhamahapatra, A[Sinhamahapatra, Apurba]Jeon, JP[Jeon, Jong-Pil]Yu, JS[Yu, Jong-Sung]
DGIST Authors
Sinhamahapatra, A[Sinhamahapatra, Apurba]; Jeon, JP[Jeon, Jong-Pil]; Yu, JS[Yu, Jong-Sung]
Issue Date
2015
Citation
Energy and Environmental Science, 8(12), 3539-3544
Type
Article
Article Type
Article
Keywords
CatalysisCatalystCharge RecombinationsElectromagnetic Wave AbsorptionEnergy GapHydrogenHydrogen ProductionHydrogen Production RateLightLight AbsorptionLight IntensityMagnesiothermic ReductionOxygen VacanciesPhoto-Catalytic ActivitiesRecombination CentersReductionSolar Power GenerationSurface DefectsSynergistic EffectTitaniumTitanium DioxideVisible-Light AbsorptionVisible SpectrumWavelength Ranges
ISSN
1754-5692
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/2631
DOI
10.1039/c5ee02443a
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Yu, Jong Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
Files:
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Collection:
ETC1. Journal Articles


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