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A preparation method of photocatalyst for treating organic sewage

A photocatalyst, organic sewage technology, applied in catalyst activation/preparation, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc. Reduce photocatalytic efficiency and other problems, achieve the effect of large light coverage, improve photocatalytic efficiency, and large comparison area

Active Publication Date: 2020-11-13
SHANGHAI SHANHENG ECOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experiments have shown that the monomers used in this scheme are all water-based monomers, and at the beginning of the reaction, titanium dioxide is used as a seed to form a core-shell structure with titanium dioxide as the core through the polymerization of acrylic monomers. A certain coating effect is not conducive to the photocatalytic reaction, resulting in a greatly reduced photocatalytic efficiency, and the water-based acrylic resin has a large number of hydrophilic carboxyl groups and short-chain ester groups. The water-based acrylic resin microspheres are placed in water for a long time. Structural collapse occurs, and it cannot be used for the treatment of organic sewage in the actual environment

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0028] One aspect of the present invention provides a method for preparing a photocatalyst for treating organic sewage, characterized in that, comprising the following steps:

[0029] (1) Preparation of nano-titanium dioxide suspension: disperse nano-titanium dioxide in distilled water, add sodium dodecylbenzenesulfonate, and place in a water bath at 40-60°C for ultrasonic dispersion for 0.5-2 hours to form nano-titanium dioxide suspension Liquid, for subsequent use; The weight percentage of nano-titanium dioxide in the suspension is 15%-20%;

[0030] (2) In parts by weight, take 50-60 parts of 2-ethylhexyl methacrylate, 2-10 parts of o-propyl styrene, 1-5 parts of initiator, and 2-3 parts of crosslinking agent , 2-5 parts of dispersant, 200-350 parts of deionized water are placed in a three-necked flask, and mixed evenly;

[0031] (3) Heat the mixture in step (2) to 50-65°C for pre-polymerization for 2-3 hours, then raise the temperature to 70-80°C to continue the reaction f...

Embodiment 1

[0044] A photocatalyst for treating organic sewage is prepared through the following steps:

[0045] (1) Preparation of nano-titanium dioxide suspension: weigh the above components at a weight ratio of anatase-type nano-titanium dioxide, rutile-type nano-titanium dioxide, and brookite-type nano-titanium dioxide at a weight ratio of 10:1:0.5, and compound and disperse them in distilled water. Add sodium dodecylbenzene sulfonate, and place it in a water bath at 60°C for ultrasonic dispersion for 2 hours to form a nano-titanium dioxide suspension for later use; wherein the total weight of the three nano-titanium dioxides accounts for 15% by weight of the suspension , the nano-titanium dioxide used is nano-titanium dioxide without surface treatment, and the weight percentage of sodium dodecylbenzenesulfonate in the suspension is 1%;

[0046] (2) In parts by weight, take 60 parts of 2-ethylhexyl methacrylate, 10 parts of o-propyl styrene, 5 parts of azobisisobutyronitrile, 3 parts ...

Embodiment 2

[0050] A photocatalyst for treating organic sewage is prepared through the following steps:

[0051] (1) Preparation of nano-titanium dioxide suspension: weigh the above components at a weight ratio of anatase-type nano-titanium dioxide, rutile-type nano-titanium dioxide, and brookite-type nano-titanium dioxide at a weight ratio of 10:1.2:0.6, and compound and disperse them in distilled water. Add sodium dodecylbenzenesulfonate, and place it in a water bath at 50°C for ultrasonic dispersion for 2 hours to form a nano-titanium dioxide suspension, which is ready for use; wherein the total weight of the three nano-titanium dioxides accounts for 18% by weight of the suspension , the nano-titanium dioxide used is nano-titanium dioxide without surface treatment, and the weight percentage of sodium dodecylbenzenesulfonate in the suspension is 1%;

[0052] (2) In parts by weight, take 60 parts of 2-ethylhexyl methacrylate, 8 parts of o-propyl styrene, 3 parts of azobisisobutyronitrile...

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Abstract

The invention discloses a preparation method of a photocatalyst for treating organic sewage. Anatase type nano titanium dioxide, rutile type nano titanium dioxide and brookite type nano titanium dioxide in a specific proportion are subjected to ternary compounding to serve as a photocatalytic component, and 2-ethylhexyl methacrylate and o-propyl styrene serve as oily functional monomers with highhydrophobicity. Photocatalytic components are added in the middle and later periods of a polymerization reaction, the photocatalytic components are dispersed in the middle and outer layers of the polymer microspheres, and meanwhile, the polymer microspheres subjected to freeze drying have aerogel structures, so that the photocatalytic efficiency is further improved. The photocatalyst prepared by the invention can be applied to an organic sewage treatment process in an actual environment, has excellent photocatalytic efficiency, has excellent flexibility in spatial network structure, and can berepeatedly used for multiple times.

Description

technical field [0001] The invention relates to a photocatalyst for treating organic sewage, in particular to a method for preparing the photocatalyst for treating organic sewage. Background technique [0002] With the continuous development of modern society, the various types of sewage discharged into the environment by people have gradually exceeded the capacity of the environment, leading to more serious pollution and affecting people's normal production and life. Photocatalytic technology is one of the important technologies in the process of environmental pollution control. [0003] Titanium dioxide is an important research direction of photocatalytic technology because of its good heat resistance and chemical stability. Titanium dioxide is stimulated by light waves, which will excite electronic transitions and form electron holes with strong oxidative properties. Through the interaction with organic matter in sewage, the organic matter will be degraded into non-toxic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J31/06B01J37/04C02F1/30C08F220/18C08F212/12C08F212/36C08F2/44C08K3/22C08J9/28C02F101/30C08L33/10
CPCB01J31/06B01J31/38B01J35/0013B01J35/004B01J37/04C02F1/30C02F2101/30C08F2/44C08J9/008C08J9/28C08J2201/0484C08J2333/10C08K3/22C08K2003/2241C08K2201/003C08K2201/011C08F220/1808C08F212/12C08F212/36
Inventor 黄海弟李云冉赵金涛王哲李坤王艳云桂明王立杰
Owner SHANGHAI SHANHENG ECOLOGICAL TECH CO LTD