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Adsorption and degradation of sulfated graphene-TiO2 composite material to amide and organophosphorus pesticides

A technology of sulfonated graphene and composite materials, which is applied in the field of photocatalytic technology and pesticide degradation, can solve the problems of unreported application of pesticide photocatalytic degradation and hydrothermal synthesis of pesticide degradation, etc., and achieves convenient operation, low cost, The effect of good application prospects

Inactive Publication Date: 2014-03-26
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the products obtained above have not reported their application to the photocatalytic degradation of pesticides.
Sulfonated graphene-TiO 2 There is no report on the hydrothermal synthesis of composite materials and the degradation of pesticides.

Method used

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  • Adsorption and degradation of sulfated graphene-TiO2 composite material to amide and organophosphorus pesticides
  • Adsorption and degradation of sulfated graphene-TiO2 composite material to amide and organophosphorus pesticides
  • Adsorption and degradation of sulfated graphene-TiO2 composite material to amide and organophosphorus pesticides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Sulfonated graphene was synthesized according to literature reports (Chem. Mater., 1998, 10, 718-722).

[0023] Using sulfonated graphene as raw material, sulfonated graphene-TiO was prepared according to reference 2 Composite materials (Int. J. Hydrogen Energ, 2008, 37, 811-815). Wherein the quality of sulfonated graphene is 13.369g, titanium tetrachloride is 6.127mL.

[0024] The prepared sulfonated graphene-TiO 2 After the composite material was washed with deionized water to neutrality, it was diluted to a suspension with a concentration of 3000mg / L, and was mixed evenly by ultrasonication.

[0025] Add 9mL of the prepared suspension to the water sample added with amide herbicides, vortex for 2min, centrifuge for 5min, discard the water layer, then add 4mL Wahaha water, vortex for 30s to mix evenly. Take 2mL of the suspension and place it under simulated sunlight for 1h, 2h, 4h and 5h respectively, and set up a control experiment.

[0026] Add 4 mL of ethyl acet...

Embodiment 2

[0029] Sulfonated graphene was synthesized according to literature reports (Chem. Mater., 1998, 10, 718-722).

[0030] Using sulfonated graphene as raw material, sulfonated graphene-TiO was prepared according to reference 2 Composite materials (Int. J. Hydrogen Energ, 2008, 37, 811-815). Wherein the quality of sulfonated graphene is 13.369g, titanium tetrachloride is 6.127mL.

[0031] The prepared sulfonated graphene-TiO 2 After the composite material was washed with deionized water to neutrality, it was diluted to a suspension with a concentration of 3000mg / L, and was mixed evenly by ultrasonication.

[0032] Add 9mL of the prepared suspension to the water sample added with organophosphorus insecticides, vortex for 2min, centrifuge for 5min, discard the water layer, then add 4mL Wahaha water, vortex for 30s to mix evenly. Take 2mL of the suspension and place it under simulated sunlight for 1h, 2h, 4h and 5h respectively, and set up a control experiment.

[0033] Add 4 mL ...

Embodiment 3

[0036] Graphene-TiO2 composites were prepared according to the method reported in the literature (Int.J.HydrogenEnerg, 2008, 37, 811-815). Among them, the mass of graphene oxide is 13.369g, and that of titanium tetrachloride is 6.127mL.

[0037] The prepared graphene-TiO 2 After the composite material was washed with deionized water to neutrality, it was diluted to a suspension with a concentration of 3000mg / L, and was mixed evenly by ultrasonication.

[0038] Add 9 mL of the prepared suspension to the water sample added with amide herbicides, vortex for 2 min, centrifuge for 5 min, discard the water layer, then add 10 mL of ethyl acetate and 3 g of sodium chloride, vortex for 2 min, centrifuge, and take After removing water, 1mL of the supernatant was passed through a 0.22μm organic phase filter membrane, and then detected by GC-MS.

[0039] The results show that graphene-TiO 2 The composite material has good adsorption effects on five amide herbicides (including alachlor, a...

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Abstract

The invention relates to adsorption-degradation action of a sulfated graphene-titanium dioxide composite material which is capable of simultaneously carrying out adsorption and photocatalytic degradation on pesticide residue in water to five amide herbicides (alachlor, acetochlor, pretilachlor, metolachlor and butachlor) and seven organophosphorus insecticides (phorate, ethoprophos, pirimiphos-methyl, chlorpyrifos, malathion, fenthion, and methidathion) in water. The sulfated graphene-titanium dioxide composite material has the advantages that the sulfated graphene-titanium dioxide composite material has better adsorption effect on the amide herbicides and the organophosphorus insecticides, and meanwhile, has good photocatalytic degradation effect under the simulative sunlight; compared with the graphene-titanium dioxide composite material, the sulfated graphene-titanium dioxide composite material has better photocatalytic degradation effect on the amide herbicides and the organophosphorus insecticides.

Description

technical field [0001] The present invention relates to sulfonated graphene / graphene-TiO 2 The invention relates to a method for the adsorption of composite materials and photocatalytic degradation of pesticides, belonging to the fields of photocatalytic technology and pesticide degradation technology. technical background [0002] Since the mid-to-late 1980s, the area and amount of herbicides used in my country have increased significantly, and its growth rate has ranked first among pesticides (insecticides, fungicides, herbicides and other pesticides). Amide herbicides are one of the herbicides widely used in my country. Organophosphorus insecticides have been continuously developed and become one of the main types of major insecticides. These pesticides have high toxicity, high environmental release rate, and wide impact. Due to the wide variety and considerable production and use, they have brought great harm to human health and the environment, such as forcing soil qu...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01J27/02A62D3/17
Inventor 马永强洪慧杰潘灿平武晓丽关文碧刘雪
Owner CHINA AGRI UNIV
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