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A kind of preparation method of palladium composite titanium dioxide nanometer material

A technology of titanium dioxide and nanomaterials, which is applied in the field of preparation of palladium-filled titanium dioxide nanotubes, and can solve problems such as the difficulty of filling precious metal palladium nanoparticles

Active Publication Date: 2019-09-20
浙江施维康生物医学材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the titanium dioxide nanotubes prepared by the hydrothermal method have thin tube walls and high aspect ratios, the diameter of the tubes is very small, less than 10nm, which undoubtedly brings great difficulties to the filling of noble metal palladium nanoparticles in titanium dioxide nanotubes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step (1). Prepare titanium dioxide nanotubes by hydrothermal method:

[0021] Add Degussa P-25 titanium dioxide nanoparticles into a plastic container filled with a 10M sodium hydroxide aqueous solution, stir and disperse, and then transfer to a stainless steel reactor lined with polytetrafluoroethylene for reaction at a temperature of 100°C , the reaction time was 30 hours; after the reaction was completed, it was cooled to room temperature, and the precipitate was collected by filtration, washed with deionized water, and calcined in a muffle furnace at 400° C. for 4 hours. Then, soak in 0.1M dilute nitric acid aqueous solution for 12 hours, then wash with deionized water until the solution pH=7, and dry in an oven to obtain titanium dioxide nanotube particles;

[0022] Step (2). The formation of titania nanotube defect:

[0023] TiO2 nanotube particles were placed in a tube furnace and then heated in boiling CCl 4 Fill the liquid with N 2 , the resulting mixed gas ...

Embodiment 2

[0027] Step (1). Prepare titanium dioxide nanotubes by hydrothermal method:

[0028] Add Degussa P-25 titanium dioxide nanoparticles into a plastic container filled with a 15M sodium hydroxide aqueous solution, stir and disperse, and then transfer to a stainless steel reactor lined with polytetrafluoroethylene for reaction at a temperature of 140°C , the reaction time was 15 hours; after the reaction was completed, it was cooled to room temperature, the precipitate was collected by filtration, washed with deionized water, and calcined in a muffle furnace at 500° C. for 2 hours. Then, soak in 0.1M dilute nitric acid aqueous solution for 24 hours, then wash with deionized water until the solution pH=7, and obtain titanium dioxide nanotube particles after drying in an oven;

[0029] Step (2). The formation of titania nanotube defect:

[0030] TiO2 nanotube particles were placed in a tube furnace and then heated in boiling CCl 4 Fill the liquid with N 2 , the resulting mixed ga...

Embodiment 3

[0034] Step (1). Prepare titanium dioxide nanotubes by hydrothermal method:

[0035] Add Degussa P-25 titanium dioxide nanoparticles into a plastic container filled with a 12M sodium hydroxide aqueous solution, stir and disperse, and then transfer to a stainless steel reactor lined with polytetrafluoroethylene for reaction at a temperature of 120°C , the reaction time was 25 hours; after the reaction was completed, it was cooled to room temperature, and the precipitate was collected by filtration, washed with deionized water, and calcined in a muffle furnace at 450° C. for 3 hours. Then, soak in 0.1M dilute nitric acid aqueous solution for 18 hours, then wash with deionized water until the solution pH=7, and obtain titanium dioxide nanotube particles after drying in an oven;

[0036] Step (2). The formation of titania nanotube defect:

[0037] TiO2 nanotube particles were placed in a tube furnace and then heated in boiling CCl 4 Fill the liquid with N 2 , the resulting mixe...

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Abstract

The invention discloses a preparation method of a palladium composite titanium dioxide nanometer material. The present invention adopts the hydrothermal method to prepare titanium dioxide nanotubes, the titanium dioxide nanotube particles are placed in a tube furnace, and then heated in boiling CCl 4 Fill the liquid with N 2 , the generated mixed gas is introduced into the tube furnace; the nano-palladium fills the above-mentioned defective titanium dioxide nanotubes. The inventive method adopts CCl 4 Etching the titanium dioxide nanotubes forms void defects on the titanium dioxide nanotubes, which is beneficial to the filling of palladium in the titanium dioxide nanotubes, forming a double synergistic effect of palladium filling doping and nanotube defects.

Description

technical field [0001] The invention belongs to the technical field of inorganic composite nanomaterials, and relates to metallic palladium and inorganic semiconductor titanium dioxide nanomaterials, in particular to a method for preparing palladium-filled titanium dioxide nanotubes. Background technique [0002] Titanium dioxide nanotubes with large specific surface area and hollow tubular structure are important inorganic functional semiconductor nanomaterials, which have good photoelectric, photosensitive, gas sensitive, pressure sensitive and other properties. And biological implant materials, etc. have been widely used. In recent years, the research on composite nanomaterials of noble metal palladium nanoparticles and titania nanotubes has received more attention. Noble metal palladium nanoparticles composited with titania nanotubes can effectively capture photogenerated electrons, promote the separation of electrons and holes, and inhibit the recombination of photogen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J35/02C02F1/30
CPCC02F1/30B01J23/44C02F2305/10B01J35/393B01J35/40B01J35/39
Inventor 聂秋林
Owner 浙江施维康生物医学材料有限公司
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