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Method for preparing nitrogen-doped titanic acid nano tube by hydrothermal cosolvent method

A technology of titanate nanotubes and nitrogen doping, which is applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of poor stability of titanate nanotubes and poor effect of organic pollutants, and achieve uniform and stable appearance. Good performance and good thermal stability

Inactive Publication Date: 2010-06-09
NORTHEAST FORESTRY UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor stability of titanate nanotubes obtained by the existing hydrothermal synthesis method and poor photocatalytic degradation of organic pollutants. The present invention provides a hydrothermal co-solvent method for preparing nitrogen-doped titanium Acid nanotube method

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  • Method for preparing nitrogen-doped titanic acid nano tube by hydrothermal cosolvent method
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  • Method for preparing nitrogen-doped titanic acid nano tube by hydrothermal cosolvent method

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specific Embodiment approach 1

[0014] Specific embodiment 1: The preparation method of nitrogen-doped titanic acid nanotubes in this embodiment is realized through the following steps: 1. Mix the sodium hydroxide solution and triethanolamine in a ratio of 1:1 to 5 by volume Obtain the blended liquid, then ultrasonically disperse the blended liquid, add anatase-type nano-titanium dioxide into the blended liquid, then move the blended liquid into a hydrothermal reactor, seal the hydrothermal reactor, and then react at 150-200°C After 12 to 20 hours, cool to room temperature by self-heating, and then filter off the supernatant in the hydrothermal reactor to obtain the reaction product, wherein the molar concentration of the sodium hydroxide solution is 8 to 15 mol / L, and the ratio of the mass of titanium dioxide to the volume of the blended solution is 1g: 20-50mL; 2. Wash the reaction product obtained in step 1 to neutrality with hydrochloric acid and then to neutrality with deionized water, and then vacuum-dr...

specific Embodiment approach 2

[0018] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, sodium hydroxide and triethanolamine are mixed at a volume ratio of 1:3 to obtain a blend. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1, the blend solution is ultrasonically dispersed in an ultrasonic wave with a power of 180-300W for 20-40 minutes. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing a nitrogen-doped titanic acid nano tube by a hydrothermal cosolvent method, which relates to a method for preparing a nitrogen-doped titanic acid nano tube. The method solves the problems of poor stability of the titanic acid nano tube obtained by the conventional hydrothermal synthetic method and poor effect of degrading organic pollutants through photocatalysis. The method comprises the following steps: firstly, putting titanium dioxide into sodium hydroxide solution and triethanolamine to perform hydrothermal reaction so as to obtain a reaction product; secondly, cleaning the reaction product, and then drying the reaction product in vacuum; and thirdly, thermally treating the reaction product in a muffle furnace to form the nitrogen-doped titanic acid nano tube. The method adopts the triethanolamine as a reaction raw material to generate the nitrogen-doped titanic acid nano tube having good thermal stability and complete tube wall and containing an H2Ti2O5H2O crystalline substance; and the catalytic rate constant shown by the nitrogen-doped titanic acid nano tube for degrading methyl orange is 0.00921, which is 9 times of the catalytic rate constant (0.00109) shown by the nano titanium dioxide for degrading the methyl orange.

Description

technical field [0001] The invention relates to a preparation method of nitrogen-doped titanic acid nanotubes. Background technique [0002] Titanate nanotubes have attracted much attention due to their wide range of applications and special tubular structures. Hoyer P prepared titania nanotubes on alumina template by anodic oxidation method in 1996; Kasuga T used hydrothermal method to prepare titania-based nanotubes in 1998, so far the research on preparing nanotubes with titania as precursor has become a nano Research hotspots and key points in the field of materials. The methods for preparing nanotubes with titanium dioxide as precursor mainly include electrochemical method, redox method, atomic deposition method, template-assisted synthesis method, etc. Currently, template synthesis method and hydrothermal method are the main methods. [0003] However, the tube wall of the titanium nanotubes obtained by the hydrothermal synthesis method is relatively thin, and the str...

Claims

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Application Information

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IPC IPC(8): C01G23/00B82B3/00
CPCY02P20/129
Inventor 孙庆丰于海鹏刘一星卢芸
Owner NORTHEAST FORESTRY UNIVERSITY
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