Reduction-oxidation graphene-Fe3O4 nano composite, preparation method thereof, and application of reduction-oxidation graphene-Fe3O4 nano composite in absorbing bisphenol A

A nanocomposite material, graphene technology, applied in the field of nanotechnology and water treatment, to achieve the effect of short adsorption equilibrium time, simple operation and mild treatment conditions

Inactive Publication Date: 2015-06-10
上海出入境检验检疫局工业品与原材料检测技术中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the large-scale use of graphene as an adsorbent will have separation and regeneration problems, so it is necessary to develop graphene composites that are efficient, cheap, and easy to regenerate and separate.

Method used

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  • Reduction-oxidation graphene-Fe3O4 nano composite, preparation method thereof, and application of reduction-oxidation graphene-Fe3O4 nano composite in absorbing bisphenol A
  • Reduction-oxidation graphene-Fe3O4 nano composite, preparation method thereof, and application of reduction-oxidation graphene-Fe3O4 nano composite in absorbing bisphenol A
  • Reduction-oxidation graphene-Fe3O4 nano composite, preparation method thereof, and application of reduction-oxidation graphene-Fe3O4 nano composite in absorbing bisphenol A

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Reduced graphene oxide is ultrasonically dispersed in double distilled water, added with hydrazine hydrate and ammonia solution, stirred to obtain a uniformly dispersed solution, refluxed in an oil bath at 50-100°C, centrifuged and vacuum-dried to obtain reduced graphene oxide ; 200mg reduced graphene oxide, 172.2mg FeCl 2 4H 2 O and 280.95mg FeCl 3 Dissolve in 200ml deionized water, then add 1.5mL NaOH (10molL -1 ), the final pH of the reaction system was controlled at 11-12, and then mechanically stirred at 80° C. for 1 hour to obtain a precipitate. The resulting precipitate was subjected to magnetic separation, washed with water and then vacuum-dried to obtain reduced graphene oxide-Fe 3 o 4 Nanocomposites with a saturation magnetization of 36 emu g -1 ,Such as figure 1 shown. Reduced graphene oxide structure into sheet shape, Fe 3 o 4 Nanoparticles are uniformly dispersed on the graphene surface, Fe 3 o 4 The average diameter of nanoparticles is about 10n...

Embodiment 2

[0030] Take 50mL of wastewater solution containing 20mg / L BPA, pH=2-8, add 10mg of reduced graphene oxide-Fe to it 3 o 4 The nanocomposite material is stirred and adsorbed at room temperature for a certain period of time, such as 6 hours. The nanocomposite material was removed with a magnet, the content of bisphenol A in the solution after adsorption was detected, and the removal rate of bisphenol A in the solution was calculated. Bisphenol A removal rate and treatment time change curve such as Figure 4 As shown, with the increase of treatment time, the removal rate of bisphenol A in the solution gradually increased, and the adsorption reached equilibrium in about 2 hours, and the removal rate of bisphenol A reached about 96%.

Embodiment 3

[0032] The reduced graphene oxide-Fe adsorbed bisphenol A 3 o 4 After washing the nanocomposite with deionized water once, add 10mL of methanol, shake for 30min, and finally wash with deionized water for 2-3 times, dry it in an oven and put it into use again for the adsorption of bisphenol A. Refer to Example 2 application method. Reduced graphene oxide-Fe after regeneration 3 o 4 After the nanocomposite material is recycled 5 times, its adsorption capacity can still maintain 95% of its original value. The impact of the number of cycles on the BPA adsorption capacity is as Figure 5 shown.

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Abstract

The invention discloses a reduction-oxidation graphene-Fe3O4 nano composite, a preparation method thereof, and an application of the reduction-oxidation graphene-Fe3O4 nano composite in absorbing bisphenol A. The reduction-oxidation graphene-Fe3O4 nano composite comprises Fe3O4 nano particles and reduction-oxidation graphene. The reduction-oxidation graphene-Fe3O4 nano composite and a solution containing the bisphenol A are in full contact in an ambient temperature, the bisphenol A is absorbed and removed. Compared with the prior art, the advantages of small material dose, simplicity in operation, mild processing condition, fast processing speed, and no harm for the environment, and recycling nano-composite materials, and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of nanotechnology and water treatment, and relates to a reduced graphene oxide (rGO)-Fe 3 o 4 Nanocomposite material, its preparation method, and its application in the adsorption of bisphenol A. Background technique [0002] Bisphenol A ((CH 3 ) 2 C(C 6 h 4 Oh) 2 , BPA) is used as a raw material and additive for the industrial production of polycarbonate, epoxy resin and other plastics. In recent years, BPA, as an endocrine disruptor (EDCs), can imitate estrogen and cause negative effects on human and animal health, which has attracted great attention and reports at home and abroad. Reports point out that even at low doses of one part per trillion, BPA may cause tumors, birth defects, and developmental disorders. BPA in environmental water mainly comes from the discharge of urban sewage and industrial sewage, which is closely related to our daily life. Because BPA cannot be biodegraded and chemical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/34
Inventor 程欲晓周宇艳杨娟沈劼强音鲜跃仲张仪轩陈宁宁李冰玉
Owner 上海出入境检验检疫局工业品与原材料检测技术中心
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