Enhanced photocatalytic activity of titania nanotube array films supported with highly dispersed Pt nanoparticles

Abstract

Self-organized Pt-TiO 2 nanotube array films were prepared on Ti sheets by anodizing in ethylene glycol solution containing a low concentration of NH 4 F and subsequent photoreduction process. Pt-TiO 2 nanotube array films were characterized by means of X-ray diffraction, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy, and ultraviolet-visible light diffuse reflectance spectra. SEM images show the highly dispersed Pt nanoparticles were deposited on the surface of TiO 2 nanotube array films. The effect of reduction treatment on the photocatalytic degradation activity of methyl orange for Pt-TiO 2 nanotube array films was investigated. The photocatalytic results showed that an optimum calcination temperature of methyl orange photocatalytic degradation activity was at 473 K and the further increased temperature could be detrimental to the photocatalytic activity due to the decrease of surface Pt concentration.

All-electrochemical fabrication of α-Fe2O3 nanotube array/Cu2O composites toward visible-light-responsive photocatalysis

“…In terms of PC application, titanium dioxide (TiO 2 ) nanotube arrays have been paramount owing to their high efficiency in ultraviolet regions and chemical stability. [5][6][7][8][9][10] However, the large bandgap energy of TiO 2 limits the utilization of visible light (VIS) which is a large part of the solar light. Hence, materials research on VIS responsive photocatalysts play a greatly important role from the viewpoint of the effective use of solar energy.…”

Bismuth doping effect on crystal structure and photodegradation activity of Bi–TiO2 nanoparticles

“…[1][2][3][4] Among various photocatalysts, TiO 2 is widely used because of its giant advantages, such as environmentally friendly, chemical and thermal stability, low cost, highly active photocatalytic property and non-toxic to human. [5][6][7][8][9] TiO 2 also can be used in photovoltaic device electrode, photocatalytic hydrogen production and environmental pollution management. [10][11][12][13][14][15][16] Three kinds of TiO 2 crystal structures are formed in nature, including anatase, rutile and brookite.…”