Photocatalysis compound filling material for micro pollution raw material pretreatment and preparation method thereof

A composite filler and pretreatment technology, which is applied in the direction of light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of unsatisfactory photocatalytic efficiency, difficult industrialization, and insufficient firmness, so as to improve photocatalytic activity , strong fluidity and easy operation

Inactive Publication Date: 2013-07-17
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned loading technology still has shortcomings such as insufficient firmness, unsatisfactory photocatalytic efficiency, and difficulty in industrialization.

Method used

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  • Photocatalysis compound filling material for micro pollution raw material pretreatment and preparation method thereof
  • Photocatalysis compound filling material for micro pollution raw material pretreatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Mix 20mg of titanate coupling agent and 10mL of ethanol, heat to 80°C, stir evenly, after reacting for 3 hours, add 1% TiO by mass ratio 2powder, and fully stirred until the ethanol boils and volatilizes to a small amount of solvent (about 1-2ml), and then repeatedly adds ethanol with the same mass ratio. Repeat the above method 2 times. Put the obtained viscous colloid in an oven, adjust the temperature to 80°C, dry it for 12 hours, crush and grind the obtained solid, and set it aside for use.

[0026] Polypropylene raw material and pretreated TiO 2 Blended on a twin-screw extruder, TiO 2 The mass fraction of the polypropylene is 8%, and the material enters the screw channel from the feeding port, so that the polypropylene raw material is gradually melted into a melt in the screw channel, and is output at a temperature of 180°C and a pressure of 78kPa, and is extruded by the screw. Shaped as oblique twist. The prepared composite filler has a diameter of ...

Embodiment 2

[0027] Example 2: Mix 25mg of titanate coupling agent and 15mL of ethanol, heat to 85°C, stir evenly, after 4.5 hours of reaction, add TiO with a mass ratio of 1.5% 2 powder, and fully stirred until the ethanol boils and volatilizes to a small amount of solvent (about 1-2ml), and then repeatedly adds ethanol with the same mass ratio. Repeat the above method 3 times. Put the obtained viscous colloid in an oven, adjust the temperature to 85°C, dry for 18 hours, crush and grind the obtained solid, and set it aside.

[0028] Polypropylene raw material and pretreated TiO 2 Blended on a twin-screw extruder, TiO 2 The mass fraction of the polypropylene is 9%, and the material enters the screw channel from the feeding port, so that the polypropylene raw material is gradually melted into a melt in the screw channel, and is output at a temperature of 190°C and a pressure of 94kPa, and is extruded by the screw. Shaped as oblique twist. The prepared composite filler has a diameter of ...

Embodiment 3

[0029] Example 3: Mix 30mg of titanate coupling agent and 20mL of ethanol, heat to 90°C, stir evenly, and after 6 hours of reaction, add TiO with a mass ratio of 2%. 2 powder, and fully stirred until the ethanol boils and volatilizes to a small amount of solvent (about 1-2ml), and then repeatedly adds ethanol with the same mass ratio. Repeat the above method 4 times. Put the obtained viscous colloid in an oven, adjust the temperature to 95°C, dry for 24 hours, crush and grind the obtained solid, and set it aside for use.

[0030] Polypropylene raw material and pretreated TiO 2 Blended on a twin-screw extruder, TiO 2 The mass fraction is 10%, and the material enters the screw channel from the feeding port, so that the polypropylene raw material is gradually melted into a melt in the screw channel, and is output at a temperature of 200 ° C and a pressure of 110kPa, and is extruded by the screw. Shaped as oblique twist. The prepared composite filler has a diameter of 15-25mm,...

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Abstract

The invention relates to an inclined helical photocatalysis compound filling material for micro pollution raw material pretreatment, which consists of polypropylene and nanometer TiO2, wherein the mass percentage of nanometer TiO2 is 8 percent to 10 percent. The invention also relates to a preparation method of the photocatalysis compound filling material, which comprises the following steps that: TiO2 is pretreated through titanate coupling agents; and the polypropylene and the pretreated TiO2 are uniformly mixed and are co-extruded and formed on a double-screw extruding machine. The photocatalysis compound filling material has the characteristics that the flowability is high, the specific surface area is large, the TiO2 combination degree is high, the photocatalysis efficiency is higher, the use period is long, the blockage is avoided, the operation is simple and convenient, and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a photocatalytic composite filler for pretreatment of slightly polluted raw water and a preparation method thereof. Background technique [0002] Photocatalytic oxidation is a way to degrade pollutants using photochemical reactions, which can be divided into two types: homogeneous and heterogeneous catalysis. In homogeneous photocatalytic degradation, Fe 2+ or Fe 3+ and H 2 o 2 As the medium, the pollutants are degraded by generating OH through the photo-Fenton reaction; the heterogeneous photocatalytic degradation is a special photosensitized oxidation with n-type semiconductor as the sensitizer. The n-type semiconductor is excited under the irradiation of incident light of a certain wavelength, and holes and free electrons are generated in its full band and conduction band, respectively. The holes generated by light have a strong ability to obt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/32C02F1/72
Inventor 郭迎庆李伯平李振宇雷春生
Owner CHANGZHOU UNIV
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