Tungsten Oxide Modified Titanium Dioxide Nanotube Preparation Method

TiO2 photocatalyst due to its excellent photocatalytic performance which has the advantages of light corrosion and chemical corrosion, non-toxic and of low cost has become a topic for many scholars. Titanium dioxide powder is frequently studied at present, however, powder photocatalyst used in water treatment usually require power to maintain the suspension. It was stirred with another catalyst separation and recovery of difficult practical application is limited. Anodic oxidation method for the manufacture of titanium substrate surface titania nanotube array films not only solve the problem of catalyst separation and recovery, and its special tubular structure can provide access to electronic transmission, reducing the composite photo-generated electrons and holes to a certain extent, help improve the efficiency of photocatalytic reaction.

A method for the preparation of the tungsten oxide modified titanium dioxide nanotube comprising the steps of:

(1)Wash the titanium sheet which has a thickness of 0.1mm, 99.9% purity titanium sheet is cut to size 20mm x 45mm, followed by surface degreasing. After oxide treatment, rinsed it with deionized water and clean air.
(2)After cleaning, anodic oxidation 1h in the electrolyte, rinse with deionized water, then air dried, and then a heating rate of 5 °C / min was raised to 450 °C. Calcining 1h to obtain a surface with titanium dioxide nanotube.
(3)The surface of the resulting titanium dioxide nanotube thin film of titanium sheet is immersed in an aqueous solution of sulfuric acid concentration of 0. 2-1.0M in 2-6h, remove dry and then immerse in a concentration of 0.3M aqueous solution of ammonium paratungstate for 2h, remove the air-dry after the muffle furnace. The temperature increasing rate of 5 °C/min was raised to 450 °C, calcined for 1h to obtain tungsten oxide modified titanium dioxide nanotube.