A kind of titanium dioxide nanotube array film and preparation method thereof

Abstract

The invention relates to a titanium dioxide nanotube array film and a preparation method thereof. The technical plan is: firstly put the titanium-containing metal sheet into the electrolyte by grinding and polishing it as an anode, anodize it for 0.5-5 hours under the condition of a controlled voltage of 10-60V; then put the anodized titanium-containing metal sheet from the electrolysis Take it out of the liquid, put it in a high-temperature furnace, and keep it warm in a protective atmosphere at 300-800°C for 0.5-10 hours; then cool it to room temperature with the furnace in a protective atmosphere, and form carbon-doped carbon on the surface of the cooled titanium-containing metal sheet. Heterogeneous or carbon-nitrogen co-doped titania nanotube array films. The invention has the characteristics of no external carbon source or nitrogen source, low reaction temperature, simple and reliable method, and controllable content of doping elements; the prepared carbon-doped titanium dioxide nanotube array film, or carbon-nitrogen co-doped titanium dioxide nanometer The elements doped in the tube array thin film are evenly distributed.

Description

technical field [0001] The invention belongs to the technical field of titanium nanotube array films, and in particular relates to a titanium dioxide nanotube array film and a preparation method thereof. Background technique [0002] In recent years, the problem of environmental pollution has become increasingly serious, and photocatalytic degradation is currently one of the most important and promising methods for dealing with organic pollutants. Photocatalytic reaction is a chemical reaction that can be promoted by photocatalyst under the condition of light. Semiconductor photocatalysts generate electron-hole pairs under illumination greater than their energy gap width. The photogenerated holes have strong oxidative properties and can quickly oxidize organic pollutants into CO. 2 and H 2 O, the use of photocatalytic reactions can decompose almost all organic pollutants harmful to human body and environment. Among many photocatalysts used for photocatalytic degradation o...

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Problems solved by technology

Cai et al embedded titanium dioxide nanotubes in a mixture of polyethylene glycol and uric acid, and heat-treated them at 600 °C in a nitrogen atmosphere to obtain carbon and nitrogen co-doped titanium dioxide nanotubes (Cai Q.Y., et al. Electrochem.Comm., 2009, 11, 1748), but at the same time, the nanotubes are also filled with carbon substances, and the photocatalytic performance is not ideal

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