Titanium dioxide-multi-walled carbon nano-tube-polydimethylsiloxane composite functional material as well as preparation method and application thereof

A technology of polydimethylsiloxane and multi-walled carbon nanotubes, applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problem of large amount of nitric acid and increased work intensity , high acidity and other problems, achieve good molecular concentration and interaction, save production costs, clean and non-toxic reagents

Active Publication Date: 2018-10-02
THE UNIV OF NOTTINGHAM NINGBO CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the application of TiO alone as a photocatalytic oxidant faces the following problems: due to the easy recombination of photogenerated holes and electrons during migration, which reduces the number reaching the surface and thus reduces the photocatalytic efficiency.
However, the above-mentioned photocatalyst is at the nanometer level, and the space for titanium dioxide to contact organic pollutants is limited during application. It is necessary to increase the concentration of titanium dioxide or add a stirring device to make the sewage flow to contact more organic pollutants, so the application cost increases and the work intensity increases. The speed of collecting and degrading organic pollutants is slow; and nanomaterials are difficult to achieve material recov

Method used

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  • Titanium dioxide-multi-walled carbon nano-tube-polydimethylsiloxane composite functional material as well as preparation method and application thereof

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Embodiment 1

[0067] A titanium dioxide-multi-wall carbon nanotube-polydimethylsiloxane composite functional material, which is based on polydimethylsiloxane, and titanium dioxide-multi-wall carbon nanotube dry powder, prepared by a microfluidic method made microspheres.

[0068] Preparation method embodiment one

[0069] A preparation method of titanium dioxide / multi-walled carbon nanotubes / polydimethylsiloxane composite functional material, comprising the steps of:

[0070]1) Acidification and oxidation treatment of multi-walled carbon nanotubes, mixing 5g of multi-walled carbon nanotubes to a volume of 125ml with a concentration of 98% sulfuric acid kept stirring in a 250ml flask until a homogeneous solution appeared, and then added dropwise at a concentration of 30% hydrogen peroxide with a volume of 62.5ml was stirred and refluxed at 120°C for 24 hours; after the reaction, it was diluted with water until the pH returned to neutral, separated by filtration, and dried at 80°C for 2 days...

Embodiment 4

[0090] A preparation method of titanium dioxide / multi-walled carbon nanotubes / polydimethylsiloxane composite functional material, comprising the steps of:

[0091] 1) Acidification and oxidation treatment of multi-walled carbon nanotubes, mixing 5g of multi-walled carbon nanotubes to a volume of 125ml with a concentration of 98% sulfuric acid kept stirring in a 250ml flask until a homogeneous solution appeared, and then added dropwise at a concentration of 30% hydrogen peroxide with a volume of 62.5ml was stirred and refluxed at 120°C for 24 hours; after the reaction, it was diluted with water until the pH returned to neutral, separated by filtration, and dried at 80°C for 2 days to obtain acidified and oxidized polysaccharides. walled carbon nanotubes;

[0092] 2) Mix 35 mg of acidified and oxidized multi-walled carbon nanotubes with 0.5 wt % 2 ml of sodium p-dodecylbenzenesulfonate aqueous solution, sonicate for 12 hours, then pour into 20 ml of isopropanol and stir evenly f...

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Abstract

The invention discloses a titanium dioxide-multi-walled carbon nano-tube-polydimethylsiloxane composite functional material. The composite functional material refers to microspheres prepared from polydimethylsiloxane serving as a substrate and a dried titanium dioxide-multi-walled carbon nano-tube powder. The composite functional material is capable of rapidly collecting pollutants in sewage and efficiently degrading organic pollutants. The invention further discloses a preparation method and the application method of the titanium dioxide-multi-walled carbon nano-tube-polydimethylsiloxane composite functional material, and is particularly applied to the technical field of sewage treatment.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a titanium dioxide-multi-walled carbon nanotube-polydimethylsiloxane composite functional material and a preparation method thereof; the invention also relates to the technical field of sewage treatment, in particular to a titanium dioxide-multi-wall carbon nanotube Application method of carbon nanotube-polydimethylsiloxane composite functional material. Background technique [0002] Titanium dioxide, as a semiconductor material, has the remarkable characteristics of non-toxic and harmless, strong oxidation ability, high catalytic activity, and good stability. It has been widely used in the photocatalytic degradation of harmful substances in recent years. When titanium dioxide is irradiated with ultraviolet light with a wavelength less than or equal to 388nm, electrons will be excited from the valence band to the conduction band to form negatively charged highly active electro...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J31/38B01J31/06C02F1/28C02F1/32C02F1/72C02F101/30C02F101/32C02F101/36
CPCB01J20/06B01J20/20B01J20/262B01J20/28021B01J31/06B01J31/38B01J35/004C02F1/281C02F1/285C02F1/32C02F1/725C02F2101/30C02F2101/32C02F2101/36C02F2101/40
Inventor 任勇陈政何俊连政魏超慧
Owner THE UNIV OF NOTTINGHAM NINGBO CHINA
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