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Method for preparing copper/nitrogen co-doped titanium dioxide nanometer powder based on dry gel-alcohol thermal method

A technology of titanium dioxide and nanopowder, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of amorphous crystallization and poor quality of samples, and achieve good photocatalytic performance and increase The effect of large specific surface area

Inactive Publication Date: 2019-04-23
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Method for preparing copper/nitrogen co-doped titanium dioxide nanometer powder based on dry gel-alcohol thermal method
  • Method for preparing copper/nitrogen co-doped titanium dioxide nanometer powder based on dry gel-alcohol thermal method
  • Method for preparing copper/nitrogen co-doped titanium dioxide nanometer powder based on dry gel-alcohol thermal method

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Embodiment 1

[0037] Cu 0.6 N 4 / TiO 2 The preparation of nanopowder photocatalyst comprises the following steps:

[0038] (1) Solution preparation:

[0039] Solution A: Mix 8.5mL butyl titanate with 30mL absolute ethanol, and stir mechanically at room temperature to form a transparent solution.

[0040] Solution B: Accurately weigh a certain amount of copper nitrate and urea, and dissolve them in a mixed solution of 1.5mL triple-distilled water, 15mL absolute ethanol and 1mL concentrated nitric acid solution. Addition of selected Cu elements (Cu / TiO 2 mass ratio) is 0.6wt%. Addition of selected N elements (N / TiO 2 The mass ratio of is 4wt%).

[0041] (2) Sol process: Slowly drop liquid B into liquid A at a rate of 30 drops / min through a peristaltic pump until a transparent sol is formed. The reaction temperature is room temperature.

[0042] (3) Gel process: After forming a sol, it is aged at room temperature, and the obtained Cu 0.6 N 4 / TiO 2 The gel was dried in an air-blast...

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Abstract

The invention discloses a method for preparing copper / nitrogen co-doped titanium dioxide nanometer powder based on a dry gel-alcohol thermal method. The method comprises: 1, preparing solutions, wherein tetrabutyl titanate and absolute ethanol are mixed to obtain a solution A, and copper nitrate and urea are dissolved in a mixed solution of triply distilled water, anhydrous ethanol and a concentrated nitric acid solution to obtain a solution B; 2, slowly adding the solution B in to the solution A in a dropwise manner; 3, aging at a room temperature after a sol is formed, drying, and grinding;4, adding the dry gel powder obtained in the step 3 to a 120 DEG C alcohol solvent, placing in a reaction kettle, sealing the reaction kettle, placing in a blast drying oven, and carrying out a reaction for 8-15 h; and 5, carrying out post-treatment, wherein the mixture is subjected to centrifugal separation, the solid obtained by the centrifugal separation is washed, and drying and grinding are sequentially performed. With the method of the present invention, the purposes of particle dispersing and specific surface area increasing can be achieved, and the titanium dioxide nanometer powder hasgood photocatalytic performance.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation, in particular to a method for preparing copper / nitrogen co-doped titanium dioxide nanopowder based on xerogel-alcohol thermal 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 object of the present invention is to provide a method for preparing copper / nitrogen co-doped titanium dioxide nanopowders based on xerogel-a...

Claims

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Application Information

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IPC IPC(8): B01J27/24A62D3/38
CPCA62D3/38B01J27/24B01J35/39B01J35/40
Inventor 刘翠萍周建国刘志峰
Owner TIANJIN CHENGJIAN UNIV
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