Method for preparing titanium dioxide nanoflower electrode

Abstract

The invention discloses a method for preparing a titanium dioxide nanoflower electrode. The method comprises the steps of firstly, preparing a layer of titanium dioxide nanotube array film on the surface of a titanium substrate through a constant-voltage anodic oxidation method; then immersing the film into a phosphoric acid aqueous solution; and carrying out hydrothermal treatment at a temperature lower than 90 DEG C to obtain the titanium dioxide nanoflower electrode. A prepared titanium dioxide nanoflower is about 10-20 nm in average thickness, and is composed of petals with the heights ofabout 440-980 nm and the widths of about 280-800 nm; the use of non-environment-friendly reagents such as heavy metal ions, tetrabutyl titanate, organic solvents and the like is avoided in the preparation process; and compared with an existing preparation method, the method is more efficient, low in cost and high in safety and controllability.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and relates to a method for preparing titanium dioxide nano flower electrodes. Background technique [0002] As a semiconductor material, titanium dioxide is widely used in solar cells, supercapacitors, electrocatalysis and water splitting due to its unique physical and chemical properties. In recent years, it has attracted widespread attention as a promising electrode material for supercapacitors, and its morphology, size and microstructure all have an important impact on its supercapacitor performance. The preparation of nanostructured titanium dioxide electrode materials is an effective way to increase its energy density and power density. For this reason, various methods for preparing nanostructured titanium dioxide have been developed, such as nanotubes, nanowires, nanosheets and nanoflowers. Nanostructured titania electrode material. Among them, titanium dioxide with nanoflower st...

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Problems solved by technology

The use of heavy metal ions will cause water pollution, which is not conducive to environmental protection; tetrabutyl titanate is easy to hydrolyze, and the preparation process has strict requirements on the environment; organic solvents such as octanol are also not conducive to environmental protection; these methods require high temperatures higher than 100 ° C Heating for a long time under the environment, the cost is high; the prepared TiO 2 Nanoflowers are mostly in the form of powder or particles, and cannot be directly used as supercapacitor electrodes.

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