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

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...

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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 recovery and cannot be reused

In the acidification treatment of the above-mentioned preparation method, the amount of nitric acid is large and the acidity is large, thereby increasing the cost and danger; the above-mentioned photocatalyst can be applied to degrade organic pollutants, especially suitable for chlorinated organic compounds and polycyclic aromatic hydrocarbons, but the water body needs to be in alkaline conditions. degradation

Therefore, there is currently a lack of a functional material for sewage treatment that is easy to recycle and can be reused, and there is also a lack of preparation methods for functional materials for sewage treatment that are simple to operate, safe in production, and low in cost. The effect of rapid collection and degradation of organic pollutants

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