Method for preparing copper/nitrogen co-doped titanium dioxide nano-powder on basis of dried gel-hydrothermal method

Abstract

The invention discloses a method for preparing Cu / N co-doped TiO2 nano-powder on the basis of a dried gel-hydrothermal method. The method for preparing the Cu / N co-doped TiO2 nano-powder on the basisof the dried gel-hydrothermal method comprises the following steps of (1) solution preparation: a solution A: mixing butyl titanate and absolute ethyl alcohol and mechanically and uniformly stirring the butyl titanate and the absolute ethyl alcohol at a room temperature to form a transparent solution; a solution B: accurately weighing copper nitrate and urea and dissolving the copper nitrate and the urea in a mixed solution of tri-distilled water, absolute ethyl alcohol and concentrated nitric acid solution; (2) soil preparation: slowly dripping the solution B into the solution A by using a peristaltic pump to form a soil; (3) gel solution; (4) dried gel-hydrothermal process: adding dried gel powder to distilled water at 60-220 degrees centigrade; placing an obtained mixture in a reactor;sealing the reactor and putting the reactor in a blowing dry box, and carrying out hydrothermal reaction for 10-14 h; and (5) after-treatment. The method for preparing the Cu / N co-doped TiO2 nano-powder on the basis of the dried gel-hydrothermal method, disclosed by the invention, has the advantages that the purposes of dispersing particles and increasing the specific surface area can be achieved,and mixed crystals of anatase and brookite can also be prepared.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation, in particular to a method for preparing Cu / N co-doped TiO based on xerogel-hydrothermal method 2 nanopowder method. Background technique [0002] TiO 2 Due to its special physical properties, the material has a wide range of applications in photocatalysis, photoelectric conversion, and electrode materials. The sol-gel method is a commonly used method for the preparation of TiO 2 Nanopowder method, but the sol-gel method has its own shortcomings: for example, the samples prepared by the sol-gel process are usually amorphous crystals or poor crystallization. High temperature calcination is required to induce crystallization, but this process usually produces particle agglomerates. Contents of the invention [0003] The purpose of the present invention is to provide a method based on xerogel-hydrothermal method to prepare Cu / N co-doped TiO 2 nanopowder method. [0004] The ...

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Problems solved by technology

The sol-gel method is a commonly used method for the preparation of TiO 2 Nanopowder method, but the sol-gel method has its own shortcomings: for example, the samples prepared by the sol-gel process are usually amorphous or poorly crystalline

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