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Catalyst for waste water treatment and preparation method thereof

A technology for wastewater treatment and catalyst, applied in textile industry wastewater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of difficult catalyst recovery, reduced catalyst efficiency, complex industrial equipment, etc., to facilitate large-scale production, It is convenient to replace and recycle, and the effect of improving the efficiency of use

Inactive Publication Date: 2014-11-19
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some problems in the photocatalytic treatment of organic wastewater using these composite photocatalysts, such as the low transmittance of light to turbid and colored wastewater; photocatalysts with three-dimensional surfaces usually have catalytic activity only on the side that receives light. Thereby reducing the efficiency of the catalyst; the industrial equipment is complicated, and the recovery of the catalyst is difficult, etc.

Method used

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  • Catalyst for waste water treatment and preparation method thereof
  • Catalyst for waste water treatment and preparation method thereof
  • Catalyst for waste water treatment and preparation method thereof

Examples

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Embodiment 1

[0035] A catalyst for wastewater treatment. Calculated by mass ratio, silica gel particles: graphene oxide: silver nanoparticles are composite particles with a core-shell structure at a ratio of 100:0.5:0.3. The core is silica gel particles, and the shell is graphite oxide. ene-silver nanoparticles.

[0036] The preparation method of above-mentioned a kind of catalyst for waste water treatment specifically comprises the following steps:

[0037] (1), silica gel modification

[0038] Disperse 400mg of silica gel into 20ml of isopropanol, heat it in a water bath to reflux, add 0.1ml of 3-aminopropyltriethoxysilane, continue the reflux reaction for 2h, stop heating, cool to room temperature, and suction filter, then the obtained The filter cake was redispersed into 10ml of water to obtain an aqueous dispersion of modified silica gel;

[0039] The amount of silica gel and 3-aminopropyltriethoxysilane used in the above modification is calculated by mass ratio, that is, silica gel...

Embodiment 2

[0053] A catalyst for wastewater treatment. Calculated by mass ratio, silica particles: graphene oxide: silver nanoparticles are composite particles with a core-shell structure at a ratio of 100:1:0.47. The core is silica gel particles, and the shell is graphene oxide- silver nanoparticles.

[0054] The preparation method of above-mentioned a kind of catalyst for waste water treatment specifically comprises the following steps:

[0055] (1), silica gel modification

[0056] Disperse 400mg of silica gel into 20ml of isopropanol, heat it in a water bath to reflux, add 0.1ml of 3-aminopropyltriethoxysilane, continue the reflux reaction for 2h, stop heating, cool to room temperature, and suction filter, then the obtained The filter cake was redispersed into 10ml of water to obtain an aqueous dispersion of modified silica gel;

[0057] The amount of silica gel and 3-aminopropyltriethoxysilane used in the above modification is calculated by mass ratio, that is, silica gel: 3-amino...

Embodiment 3

[0062] A catalyst for wastewater treatment. Calculated by mass ratio, silica gel particles: graphene oxide: silver nanoparticles are composite particles with a core-shell structure at a ratio of 100:0.75:0.63. The core is silica gel particles, and the shell is graphene oxide. -Silver nanoparticles.

[0063] The preparation method of above-mentioned a kind of catalyst for waste water treatment specifically comprises the following steps:

[0064] (1), silica gel modification

[0065] Disperse 400mg of silica gel into 20ml of isopropanol, heat it in a water bath to reflux, add 0.1ml of 3-aminopropyltriethoxysilane, continue the reflux reaction for 2h, stop heating, cool to room temperature, and suction filter, then the obtained The filter cake was redispersed into 10ml of water to obtain an aqueous dispersion of modified silica gel;

[0066] The amount of silica gel and 3-aminopropyltriethoxysilane used in the above modification is calculated by mass ratio, that is, silica gel:...

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Abstract

The invention discloses a catalyst for waste water treatment and a preparation method thereof. The catalyst for waste water treatment is prepared from core-shell structure composite particles which are composed of silica gel particles, oxidized graphene and silver nanoparticles with the proportion of 100:(0.5-1):(0.3-0.63) according to mass ratio, wherein the silica gel particles are used as a core, and the oxidized graphene and the silver nanoparticles are used as a shell. The preparation method comprises the following steps of firstly, dispersing silica gel into isopropanol, heating to a backflow state, then adding 3-aminopropyltriethoxysilane, continuing performing backflow reaction for two hours, then cooling to room temperature and performing suction filtration, and dispersing obtained filter cakes into water, so as to obtain modified silica gel water dispersion liquid; and then adding oxidized graphene water dispersion liquid and a silver nitrate water solution, then heating to 90 DEG C, then slowly adding a sodium borohydride water solution as a reducing agent, then continuing performing mixing reaction at 90 DEG C for four to six hours, cooling to room temperature and performing suction filtration, and drying the obtained filter cakes at 60 DEG C, so as to obtain the silica gel / reduced oxidized graphene / nano-silver integrated catalyst.

Description

technical field [0001] The invention relates to a catalyst for wastewater treatment which is highly efficient, mild and does not require light source treatment and a preparation method thereof. Background technique [0002] With the development of human economy and society, environmental problems, especially the harm of water pollution to human body, are getting more and more attention. Printing and dyeing wastewater is one of the main sources of water pollution at present. Because organic dyes are difficult to degrade, they are easy to accumulate in water, which seriously threatens the ecological environment and human health. Traditional water treatment methods mainly include physical and chemical methods and biological methods. Physicochemical methods have high operating costs, while biochemical methods have poor treatment effects on some organic matter. Therefore, how to solve the problem of water pollution with low-cost, high-efficiency, and mild-condition technology i...

Claims

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Application Information

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IPC IPC(8): B01J23/50C02F1/00C02F101/30C02F103/30
Inventor 李向清张太阳康诗钊秦利霞
Owner SHANGHAI INSTITUTE OF TECHNOLOGY