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Reduced graphene/ferroferric oxide/precious metal nanocomposite and preparation method and application thereof

A nanocomposite material, ferric oxide technology, applied in the field of materialization, can solve the problems of difficult filtration or separation and recovery, small particle size, etc., and achieve the effect of surface enhanced Raman activity, high adsorption characteristics, and low environmental pollution

Inactive Publication Date: 2016-08-10
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, noble metal-modified reduced graphene has the characteristics of small particle size and is not easy to filter or separate and recover.

Method used

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  • Reduced graphene/ferroferric oxide/precious metal nanocomposite and preparation method and application thereof
  • Reduced graphene/ferroferric oxide/precious metal nanocomposite and preparation method and application thereof
  • Reduced graphene/ferroferric oxide/precious metal nanocomposite and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of magnetic Fe3O4 nanoparticles by ferric chloride

[0041]Dissolve 0.5g of ferric chloride hexahydrate and 1.2g of hexamethylenetetramine in 100mL of ethylene glycol solution, ultrasonically disperse for 45min, then move to a hydrothermal autoclave, react at 200°C for 10h, after the reaction is complete Cool to room temperature, use a magnet to separate the magnetic substance from the solution, wash it repeatedly with deionized water and absolute ethanol and then separate it with a magnet, and then dry the separated magnetic iron ferric oxide nanoparticles at 100 °C for 12 hours, Ultrasonic disperse in 10mL deionized water, and finally obtain the magnetic ferric oxide nanomaterial ( figure 1 ).

[0042] (2) Prepare reduced graphene solution using cysteine

[0043] Under the condition of ice-water bath, add 0.5g of graphite powder, 0.5g of sodium nitrate and 20mL of concentrated sulfuric acid with a mass fraction of 98% in the three-necked flask succes...

Embodiment 2

[0051] (1) Preparation of magnetic Fe3O4 nanoparticles by ferric nitrate

[0052] Dissolve 1.2g of ferric nitrate nonahydrate and 2.5g of hexamethylenetetramine in 200mL of ethylene glycol solution, and after ultrasonic dispersion for 60min, move it to a hydrothermal autoclave, react at 250°C for 6h, cool down after the reaction is complete to room temperature, use a magnet to separate the magnetic substance from the solution, wash it repeatedly with deionized water and absolute ethanol, and then separate it with a magnet, then dry the separated magnetic ferric iron tetroxide nanoparticles at 100°C for 12 hours, and ultrasonically Disperse in 10mL of deionized water to finally obtain the magnetic Fe3O4 nanometer material, the concentration of the magnetic Fe3O4 is about 68 mg / mL.

[0053] (2) Prepare reduced graphene solution using bovine serum albumin

[0054] Under the condition of ice-water bath, add 1.0g of graphite powder, 1.5g of sodium nitrate and 30mL of concentrated ...

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Abstract

The invention discloses a reduced graphene / ferroferric oxide / precious metal nanocomposite and a preparation method and application thereof. The preparation method comprises the specific steps that 1, polyethyleneimine and polyacrylic acid are used as polyelectrolytes, and a reduced graphene nano material supported by magnetic ferroferric oxide is prepared through a self-assembly method; 2, trimethoxysilylpropanethiol is added into the reduced graphene nano material supported by the magnetic ferroferric oxide, and a magnetic graphene material modified by the trimethoxysilylpropanethiol is obtained; 3, precious metal nano particles and the magnetic graphene material modified by the trimethoxysilylpropanethiol are mixed, and the reduced graphene / ferroferric oxide / precious metal nanocomposite is obtained. The obtained composite has the good surface-enhanced Raman activity and electrocatalytic activity, and can be widely applied to the fields of biosensing, electrocatalysis, surface-enhanced Raman detection and the like.

Description

technical field [0001] The invention belongs to the technical field of materialization, and specifically relates to a reduced graphene / ferric oxide / noble metal composite material and a preparation method thereof. Background technique [0002] Graphene (Graphene, G) is a new type of two-dimensional planar nanomaterial discovered by A. Geim and Novoselov (K.Novoselov) of the University of Manchester in 2004. Graphene is a new type of material. A novel two-dimensional carbon nanomaterial whose carbon atoms are separated by unique sp 2 Composition of hybrid structures. Graphene has a huge theoretical surface area and unique high conductivity, making it have broad application prospects in the fields of optics, electronics, and biosensing. Recent studies have shown that graphene can be used as an excellent surface-enhanced Raman substrate material due to its unique electronic structure, such as a paper titled "Can Graphene be used as a Substrate for Raman Enhancement?" .) artic...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30G01N27/26G01N21/65
CPCB01J20/0233B01J20/06B01J20/20B01J20/28009G01N21/658G01N27/26
Inventor 李丹贾少杰陈培琴黎芳源王欣瑶孙玥徐虎王宇红邓维吴越
Owner SHANGHAI INST OF TECH
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