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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 741Synthesis and Structure of Titania Nanotubes For...

Synthesis and Structure of Titania Nanotubes For Hydrogen Generation

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Abstract:

Titania nanotubes (TiO₂NTs) working electrodes for hydrogen production by photoelectrocatalytic water splitting were synthesized by means of anodization method. The electrolytes were the mixtures of oxalic acid (H₂C₂O₄), ammonium fluoride (NH₄F), and sodium sulphate (VI) (Na₂SO₄) with different pHs. A constant dc power supply at 20 V was used as anodic voltage. The samples were annealed at 450 °C for 2 hrs. Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) were used to characterized TiO₂NTs microstructure. TiO₂NTs with diameter of 100 nm were obtained when pH 3 electrolyte consisting of 0.08 M oxalic acid, 0.5 wt% NH₄F, and 1.0 wt% Na₂SO₄was used. Without external applied potential, the maximum photocurrent density was 2.8 mA/cm² under illumination of 100 mW/cm². Hydrogen was generated at an overall photoconversion efficiency of 3.4 %.

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Materials and Nanotechnology in Engineering

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Periodical:

Advanced Materials Research (Volume 741)

Pages:

84-89

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.741.84

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Online since:

August 2013

Authors:

Sangworn Wantawee, Pacharee Krongkitsiri, Tippawan Saipin, Buagun Samran, Udom Tipparach

Keywords:

Anodization, Hydrogen Generation, Renewable Energy, TiO₂, Titania Nanotubes

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