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Method for weaving net composite catalytic material from nanometer titania and polytetrafluoroethylene in mixing manner, and application of net composite catalytic material

A technology of nano-titanium dioxide and polytetrafluoroethylene, applied in the direction of organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of photocatalytic performance, poor photocatalytic performance, high cost

Inactive Publication Date: 2014-12-24
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods all use chemical deposition, spray gel, or physical film preparation methods, and the preparation process is complicated and the cost is high.
At the same time, these blocks can only be deposited at the bottom of the water body; since the light intensity of sunlight transmitted to the bottom of the water body has been weakened, the photocatalytic performance at the bottom will inevitably be inferior to that of the surface or middle of the wastewater body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] The method for weaving nano-titanium dioxide and polytetrafluoroethylene into a mesh-like composite catalytic material in the present invention directly uses ball milling to load nano-titanium dioxide on the polytetrafluoroethylene, and has the characteristics of adjustable density, including the following steps:

[0021] 1) Place the polytetrafluoroethylene cylinder in a cylindrical ball mill jar;

[0022] 2) Place the grinding ball and the titanium dioxide powder in the ratio of (10-30):1 in the polytetrafluoroethylene cylinder cavity;

[0023] 3) Adjusting the rotational speed of the ball mill and the ball milling time to obtain a mesh-shaped nano-titanium dioxide-polytetrafluoroethylene composite catalytic material.

[0024] The above-mentioned grinding balls are agate balls or zirconia balls.

[0025] The outer diameter of the polytetrafluoroethylene cylinder in the above step 1) is the same as the inner diameter of the cylindrical ball milling jar, and the radial...

Embodiment 1

[0036] Put the cylindrical polytetrafluoroethylene with a radial thickness of 10mm in a cylindrical ball milling tank with an inner diameter of 100mm (that is, the outer diameter of the cylindrical polytetrafluoroethylene is 100mm and the inner diameter is 80mm), and the cylindrical ball mill The volume of the tank is 500ml, and 50g of agate balls and 5g of TiO with an average particle size of 2μm are mixed according to the ball-to-material ratio of 10:1. 2 The powder is placed in the cavity of a cylindrical polytetrafluoroethylene. Adjust the rotating speed of the ball mill to 400rpm. After 10 hours of ball milling, the mesh-shaped nano-TiO can be obtained 2 - Polytetrafluoroethylene compound. Nano-TiO in its mesh-like composite 2 The average particle size is 500nm, the flake size is 3.6mm, and the density is 1.20g / cm 3 .

Embodiment 2

[0038] A cylindrical polytetrafluoroethylene with a radial thickness of 20mm is placed in a cylindrical ball milling jar with an inner diameter of 300mm. The volume of the cylindrical ball milling jar is 1000ml, and 120g of zirconia balls and 12g of TiO with an average particle size of 0.8 μm 2 The powder is placed in a cavity of polytetrafluoroethylene. Adjust the rotating speed of the ball mill to 500rpm. After 50 hours of ball milling, the mesh-like nano-TiO can be obtained 2 - Polytetrafluoroethylene compound. Nano-TiO in its mesh-like composite 2 The average particle size is 245nm, the flake size is 5mm, and the density is 0.91g / cm 3 .

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Abstract

The invention discloses a method for weaving a net composite catalytic material from nanometer titania and polytetrafluoroethylene in a mixing manner, and an application of the net composite catalytic material. The nanometer titania is directly loaded on the polytetrafluoroethylene by a ball-milling method. The method comprises the following steps of 1) putting a polytetrafluoroethylene cylinder into a cylindrical ball-milling tank; 2) putting the ball and the nanometer titania into a polytetrafluoroethylene cylinder cavity according to the ball-to-material ratio of (10-30) to 1; and 3) adjusting the rotating speed and the ball-milling time of a ball grinder so as to obtain the net nanometer titania-polytetrafluoroethylene composite catalytic material. The mixed weaving method disclosed by the invention is simple in process, simple in equipment, low in cost, and easy to control; the application of the net composite catalytic material is that a loading body of the net composite catalytic material can float in different densities of waste water bodies to carry out wastewater treatment; the specific surface area of the titanium dioxide on the loading body is larger than that loaded on the plate; but the cost is lower and the operation is simpler.

Description

technical field [0001] The invention relates to a method for weaving titanium dioxide and polytetrafluoroethylene into a mesh-like composite catalytic material and the application of the mesh-like composite catalytic material, especially a nano-photocatalytic titanium dioxide (TiO 2 ) and polytetrafluoroethylene to form a mesh-shaped composite catalytic material with adjustable density, which belongs to the invention technology of the method of mixing titanium dioxide and polytetrafluoroethylene to form a mesh-shaped composite catalytic material. Background technique [0002] Titanium dioxide (TiO 2 ) is cheap and non-toxic, has excellent photoelectric properties, high catalytic activity, strong oxidation ability, and good chemical stability. prospect. Studies have shown that the impact of TiO 2 There are many factors for photocatalytic activity, such as grain size, specific surface area, surface adsorption, and surface states (surface hydroxyl groups, oxygen vacancies, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J35/04C02F1/30
Inventor 何琴玉钟伟徐惠欣陈振瑞钟斌李萍刘俊明李炜王银珍黄媛贺冠南谢元栋
Owner SOUTH CHINA NORMAL UNIVERSITY
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