Method for In Situ Fabrication of Titanium Dioxide Thin Films Exposing High Energy Crystal Facets

Abstract

The method of in-situ preparation of high-energy crystal surface exposed titanium dioxide thin film, obtaining the substrate, and annealing the substrate, cleaning and drying the annealed substrate for later use; preparing the reaction precursor liquid, the reaction precursor liquid is composed of titanium source, hydrofluoric acid and Boron oxide is obtained by uniform mixing; the reaction precursor and the substrate are put into a stainless steel high-pressure reactor at the same time for hydrothermal reaction to obtain a sample with a titanium dioxide film on the surface, and the sample after taking out is ultrasonically cleaned in deionized water and dried at room temperature; The obtained sample is defluoridated at a high temperature, then immersed in water to cool, and finally dried to obtain a matrix of anatase titanium dioxide film exposed by a high-energy {001} crystal plane; the purpose of the present invention is to provide a A method for growing anatase-type titanium dioxide thin films with uniform morphology, intact crystal form, and exposed {001} crystal planes.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for in-situ preparation of anatase-type titanium dioxide film exposed by a high-energy {001} crystal plane. Background technique [0002] Due to its good chemical and physical stability, environmental friendliness, abundant resources, and excellent photocatalytic performance, anatase titanium dioxide crystals are very important in photocatalytic water splitting, solar cells, photocatalytic degradation of organic matter, and biosensors. application. In the above-mentioned applications in these fields, the performance of the anatase titanium dioxide thin film crystal mainly depends on the surface morphology of the crystal, especially its crystal plane. Therefore, the method of artificially controlling the synthesis of specific anatase-type titanium dioxide crystal faces has attracted extensive attention. Anatase titanium dioxide crystal mainly consists of three crystal...

AI Technical Summary

Problems solved by technology

[0005] The {001} crystal surface exposed anatase titanium dioxide reported in the literature is generally a powder particle, and the powder particle has the disadvantages that it cannot be fixed and is difficult to recycle, which limits its application, including photocatalysis, biomaterials and other fields.

Especially when titanium dioxide that needs to be attached to the substrate is used as a catalyst, the combination of titanium dioxide and the substrate is difficult, the effective surface of titanium dioxide cannot be exposed, and the catalytic efficiency is low

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