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TiO2-reduced graphene composite and preparation method thereof and application of TiO2-reduced graphene composite to artificial sea water system

A composite material, graphene technology, applied in seawater treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of surface active site occupation, catalytic activity reduction, disappearance, etc., to improve degradation activity, simple preparation method, Easy-to-operate effects

Active Publication Date: 2016-05-04
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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  • TiO2-reduced graphene composite and preparation method thereof and application of TiO2-reduced graphene composite to artificial sea water system
  • TiO2-reduced graphene composite and preparation method thereof and application of TiO2-reduced graphene composite to artificial sea water system
  • TiO2-reduced graphene composite and preparation method thereof and application of TiO2-reduced graphene composite to artificial sea water 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 30°C water bath. 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 placed...

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Abstract

The invention discloses a TiO2-reduced graphene composite and a preparation method thereof and application of the TiO2-reduced graphene composite to an artificial sea water system. The preparation method comprises the steps that 1, graphene oxide, absolute ethyl alcohol and deionized water are mixed and stirred in a water bath to form a balanced adsorption system; 2, a tetrabutyl titanate dissolved absolute ethyl alcohol solution is added dropwise to the adsorption system, and a reaction is carried out to obtain a TiO2-graphene oxide particle containing suspension system; 3, the obtained suspension system is transferred into an autoclave, and thermal treatment is carried out after closing; 4, heat treatment reaction liquid is separated after being cooled, and the composite is obtained after washing and drying. The method is simple in synthesis process, and the size of finished TiO2 anatase crystals obtained through the method ranges from 1 nm to 20 nm. Efficient light degradation can be carried out in the artificial sea water system to remove phenol, and the shape and performance of a photocatalyst can be effectively regulated and controlled by regulating reaction and thermal 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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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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