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A kind of tio2-reduced graphene composite material and its preparation method and application in artificial seawater system

A composite material and graphene technology, applied in seawater treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as disappearance, reduction of catalytic activity, and occupation of surface active sites, and achieve easy operation, simple preparation method, and improved The effect of degradation activity

Active Publication Date: 2018-10-26
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the organic matter cannot be effectively adsorbed, the active sites on the surface of the catalyst will be occupied by ions, resulting in a reduction or even disappearance of the catalytic activity.

Method used

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  • A kind of tio2-reduced graphene composite material and its preparation method and application in artificial seawater system
  • A kind of tio2-reduced graphene composite material and its preparation method and application in artificial seawater system
  • A kind of tio2-reduced graphene composite material and its preparation method and application in artificial seawater system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Catalyst preparation

[0046] Get 0.5g graphene oxide with hydrophilic surface (specific surface area 50m 2 / g), 200mL of absolute ethanol and 1.5mL of deionized water were placed in a flask, stirred and adsorbed in a water bath at 30°C. After adsorption equilibrium (more than 12 hours), a stable adsorption water layer is formed on the surface of graphene oxide.

[0047] Another 50 mL of absolute ethanol in which 2.15 g of tetrabutyl titanate was dissolved was dropped into the adsorption equilibrium system drop by drop using a constant pressure funnel. Tetrabutyl titanate will diffuse into the adsorbed water layer, and form TiO in the adsorbed layer on the surface of graphene oxide through hydrolysis and polycondensation reactions. 2 Nanoparticles. After the reaction was completed (5 hours), the obtained 2 - Suspension system of graphene oxide particles.

[0048] The post-reaction suspension system was added to a high-pressure reactor lined with polytetrafluoro...

Embodiment 2

[0058] (1) Catalyst preparation

[0059] Get 0.6g graphene oxide (specific surface area 50m 2 / g), 200mL of absolute ethanol and 1.5mL of deionized water were placed in a flask, stirred and adsorbed in a water bath at 30°C. After adsorption equilibrium (more than 12 hours), a stable adsorption water layer is formed on the surface of graphene oxide.

[0060] Another 50 mL of absolute ethanol in which 2.15 g of tetrabutyl titanate was dissolved was dropped into the adsorption equilibrium system drop by drop using a constant pressure funnel. Tetrabutyl titanate will diffuse into the adsorbed water layer, and form TiO in the adsorbed layer on the surface of graphene oxide through hydrolysis and polycondensation reactions. 2 Nanoparticles. After the reaction was completed (5 hours), the obtained 2 - Suspension system of graphene oxide particles.

[0061] The post-reaction suspension system was added to a high-pressure reactor lined with polytetrafluoroethylene, sealed and plac...

Embodiment 3

[0071] (1) Catalyst preparation

[0072] Get 0.8g graphene oxide (specific surface area 100m 2 / g), 200mL of absolute ethanol and 3.0mL of deionized water were placed in a flask, stirred and adsorbed in a water bath at 30°C. After adsorption equilibrium (more than 12 hours), a stable adsorption water layer is formed on the surface of graphene oxide.

[0073] Another 50 mL of absolute ethanol in which 2.15 g of tetrabutyl titanate was dissolved was dropped into the adsorption equilibrium system drop by drop using a constant pressure funnel. Tetrabutyl titanate will diffuse into the adsorbed water layer, and form TiO in the adsorbed layer on the surface of graphene oxide through hydrolysis and polycondensation reactions. 2 Nanoparticles. After the reaction was completed (5 hours), the obtained 2 - Suspension system of graphene oxide particles.

[0074] The post-reaction suspension system was added to a high-pressure reactor lined with polytetrafluoroethylene, sealed and pla...

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Abstract

The invention discloses a TiO2-reduced graphene composite material, its preparation method and its application in artificial seawater system. The preparation method includes (1) mixing graphene oxide, absolute ethanol and deionized water, and stirring in a water bath until Form a balanced adsorption system; (2) Add the absolute ethanol solution dissolved with tetrabutyl titanate dropwise into the resulting adsorption system, and react to obtain a suspension system containing TiO2-graphene oxide particles; (3) Suspend the resulting The system is moved into an autoclave, sealed and then heat treated; (4) The heat treatment reaction liquid is cooled and separated, and is obtained after washing and drying. The synthesis process of the method of the present invention is simple, and the TiO2 obtained by the present invention is crystallized into anatase with a size of 1 to 20 nm. Phenol can be efficiently photodegraded and removed in artificial seawater systems, and the photocatalyst morphology and performance can be effectively controlled by adjusting reaction and heat treatment parameters.

Description

technical field [0001] The invention relates to the field of composite photocatalyst preparation and photocatalytic oxidation degradation of pollutants in saline wastewater systems, in particular to a TiO with weak light response in artificial seawater systems 2 - Preparation method of reduced graphene composite material. Background technique [0002] my country has a vast ocean area and rich marine resources, but with the continuous development of the marine economy and the continuous land discharge of industrial and agricultural wastewater, marine pollution has gradually become an important factor restricting my country's economic development. In particular, the pollution of the offshore environment due to the land discharge of industrial and agricultural waste water and fishing and fishing is very serious. In addition to restricting the discharge of industrial and agricultural wastewater to seawater, there is an urgent need to find a technology that can be applied to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/32B01J21/18C02F101/34C02F103/08
CPCC02F1/32B01J21/18C02F2103/08C02F2101/345B01J35/39
Inventor 王挺许智勇祝轶琛吴礼光
Owner ZHEJIANG GONGSHANG UNIVERSITY
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