Preparation method of metal-doped TiO2 nanotube modified by expansion type self-assembly layer

A metal-doped, self-assembled layer technology, applied in nanotechnology, titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of large specific surface area of ​​nanomaterials, easy agglomeration, difficult nanomaterials, etc., to improve the affinity , Overcome the effect of poor dispersion and controllable matrix affinity

Inactive Publication Date: 2021-03-02
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large specific surface area of ​​nanomaterials, it is easy to agglomerate, so it is difficult for a single nanomaterial to achieve nanoscale dispersion in a polymer matrix.

Method used

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  • Preparation method of metal-doped TiO2 nanotube modified by expansion type self-assembly layer
  • Preparation method of metal-doped TiO2 nanotube modified by expansion type self-assembly layer
  • Preparation method of metal-doped TiO2 nanotube modified by expansion type self-assembly layer

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preparation example Construction

[0036] Embodiments of the present invention provide a metal-doped TiO modified by an expanded self-assembled layer 2 The preparation method of nanotube mainly comprises the following steps:

[0037] S1. Preparation of metal-doped TiO 2 nanotube

[0038] The present invention adopts hydrothermal synthesis method to prepare metal-doped TiO 2 Nanotubes, which mainly include the following steps:

[0039] Fe(NO 3 ) 3 9H 2 O or Ni(NO3 ) 2 ·6H 2 O and TiO 2 Add the powder into 10mol / L sodium hydroxide solution at a molar ratio of 1:10~15, stir evenly to obtain the first suspension, in which 10mol / L sodium hydroxide solution and TiO 2 The mass ratio of the powder is 20-30:1, the first suspension is transferred to a polytetrafluoroethylene reactor for hydrothermal reaction, and the reaction is carried out at a temperature of 130-160°C for 24-48 hours to obtain the reactant, which is to be reacted After the product is cooled to room temperature, the solid matter in the reactan...

Embodiment 1

[0077] Metal-doped TiO modified by an intumescent self-assembled layer 2 The preparation method of nanotube mainly comprises the following steps:

[0078] S1. Preparation of iron-doped TiO 2 nanotube

[0079] 0.8g Fe(NO 3 ) 3 9H 2O was added to 30mL of 10mol / L sodium hydroxide solution and stirred until completely dissolved, then 1.6g of TiO was added 2 powder, stir evenly to obtain the first suspension, transfer the first suspension obtained by stirring uniformly to a 50ml polytetrafluoroethylene reactor, and react at a temperature of 150°C for 36h to obtain the reactant, and the reactant is cooled to After room temperature, centrifuge to separate the solid matter in the reactant, then wash with 0.1mol / L hydrochloric acid and deionized water to neutrality, and dry the washed solid matter in an oven at 50°C for 12 hours to obtain iron doped TiO 2 nanotube;

[0080] S2, prepare positive electrolytic solution and negative electrolytic solution respectively

[0081] Weig...

Embodiment 2

[0095] Metal-doped TiO modified by an intumescent self-assembled layer 2 The preparation method of nanotube mainly comprises the following steps:

[0096] S1. Preparation of Ni-doped TiO 2 nanotube

[0097] 0.5g Ni(NO 3 ) 2 ·6H 2 Add O to 30mL of 10mol / L sodium hydroxide solution and stir until completely dissolved, then add 1.6g of TiO 2 Powder, stir evenly to obtain the first suspension, transfer the first suspension obtained by stirring evenly to a 50ml polytetrafluoroethylene reactor, react at a temperature of 130°C for 48h, obtain the reactant, and wait for the reactant to cool to room temperature Afterwards, centrifuge to separate the solid matter in the reactant, then wash it with 0.1mol / L hydrochloric acid and deionized water to neutrality, and dry the washed solid matter in an oven at 50°C for 12 hours to obtain iron doped TiO 2 nanotube;

[0098] S2, prepare positive electrolytic solution and negative electrolytic solution respectively

[0099] S21, preparin...

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Abstract

The invention relates to the technical field of new materials, in particular to a preparation method of a metal-doped TiO2 nanotube modified by an expansion type self-assembly layer. The preparation method mainly comprises the following steps: preparing a metal-doped TiO2 nanotube, a positive electrolyte solution and a negative electrolyte solution, dispersing the metal-doped TiO2 nanotube in thepositive electrolyte solution, stirring for 10-20 minutes, dispersing in the negative electrolyte solution, and stirring for 5-10 minutes to finish a first bimolecular self-assembly layer on the surface of the metal-doped TiO2 nanotube; and repeating the operation for 5-20 times to obtain the metal-doped TiO2 nanotube modified by the expansion type self-assembly layer. The modified transition metal doped TiO2 nanotube disclosed by the invention has excellent flame-retardant synergism and matrix affinity, overcomes the defects of poor dispersibility, low flame-retardant efficiency and the likeof the TiO2 nanotube, and has a good flame-retardant application prospect.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a metal-doped TiO modified by an expanded self-assembly layer 2 Methods for the preparation of nanotubes. Background technique [0002] TiO 2 As a typical representative of many metal oxide nanomaterials, nanotubes have been extensively studied. TiO 2 The structure of the nanotube is a hollow cylinder, and the wall of the nanotube is generally composed of 2-10 thin layers of coils, and its aspect ratio is generally greater than 10, and some can even reach several thousand. Due to its excellent electrical conductivity, light absorption and other properties. In recent years, TiO 2 Nanotubes have been extended to the field of flame retardant materials. TiO 2 Nanotubes have a high specific surface area and good thermal stability. It is generally believed that TiO 2 The unique excellent adsorption of nanotubes, combined with the formation of a network physical barrier l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K7/24C08L63/00C01G23/047B82Y40/00
CPCB82Y40/00C01G23/08C01P2002/82C01P2002/85C01P2004/04C01P2004/13C08K7/24C08K9/10C08K2201/011C08L2201/02C08L63/00
Inventor 潘海峰马文彬
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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