Publications (2)4.95 Total impact
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Article: Fabrication of nanostructured titania on flexible substrate by electrochemical anodization
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ABSTRACT: Titanium films were deposited on ITO (indium tin oxide)-coated PEN (polyethylene naphthalate) and flexible clay substrates by ion beam sputter deposition method. The surface morphology of the deposited films was smooth on PEN and rough on clay substrates. The titanium film deposited on Clay-mo (98% montmorillonite) substrate was anodized in ethylene glycol + 2 vol% H2O + 0.3 wt% NH4F solution, and the titanium films deposited on Clay-st (99% stevensite) substrate was anodized in 2-propanol + 16 vol% H2O + 0.14 M NH4F solution. Then nanohole-structured titania (TiO2) films were firstly and successfully fabricated on the flexible transparent clay substrates. The nanohole structures of TiO2 on both clay substrates were similar to those on PEN and glass substrates. The TiO2 nanohole structure was almost maintained after annealing at 450 °C for 4 h in air. The optical transmittance of the nanohole-structured TiO2 films on Clay-st increased from 26% to 54% at 800 nm in wavelength after annealing at 450 °C for 1 h in air.Journal of Power Sources. -
Article: Functionalization of electrochemically prepared titania nanotubes with Pt for application as catalyst for fuel cells
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ABSTRACT: Titania nanotubes (TiNTs) were prepared by electrochemical anodization and were used as a support for depositing Pt. After annealing the TiNTs changed to crystalline anatase phase and were doped with carbon. The TiNTs/Pt/C was tested as electrode for electrochemical catalysis of methanol oxidation. The composite catalyst activities were measured by cyclic voltammetry in 1 M CH3OH + 1 M H2SO4. The results demonstrated that TiNTs/Pt/C can greatly enhance the catalytic activity of methanol oxidation. The CO stripping led to the increase in the current peak of methanol oxidation due to activating the catalyst surface by point defect formation. Moreover, the higher ratio of the forward anodic peak current to the reverse anodic peak current indicates more effective removal of the poisonous species.Journal of Power Sources 195(18):5889-5895. · 4.95 Impact Factor
