Yolk-eggshell structure Au@ hollow carbon nanosphere composite material and preparation and application thereof

A technology of carbon nanospheres and composite materials, applied in the field of materials, can solve the problems of low porosity of the carbon shell, unfavorable precious metal yolk core, hindering the basic application research and industrialization process of nanocomposites, and achieve good catalytic effect

Active Publication Date: 2016-01-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the template method generally has the following insurmountable shortcomings: (1) Complex surface modification is required: when introducing noble metal yolk cores, surface chemical modification is required to solve the interface compatibility problems of yolk cores/templates and templates/carbon precursors; ( 2) Requires cumbersome template removal: the experimental operation of removing the hard template is cumbersome, sometimes even dangerous and pollutes the en...

Method used

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  • Yolk-eggshell structure Au@ hollow carbon nanosphere composite material and preparation and application thereof
  • Yolk-eggshell structure Au@ hollow carbon nanosphere composite material and preparation and application thereof
  • Yolk-eggshell structure Au@ hollow carbon nanosphere composite material and preparation and application thereof

Examples

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Effect test

Embodiment 1

[0037] Prepare a kind of egg yolk-eggshell structure Au hollow carbon nanosphere composite material according to the following steps:

[0038] (1) Weigh 0.0216g of HAuCl 4 Dissolve in 237.5mL deionized water, add it to a 500mL three-necked flask equipped with a water conduit, reflux condenser, vacuum plug, and magnet, stir vigorously with a magnet, heat to reflux, and heat to boiling to obtain a chloroauric acid solution ; Weigh 0.125g of trisodium citrate and dissolve it in 12.5mL of deionized water to obtain an aqueous solution of sodium citrate, then quickly add it to the chloroauric acid solution at one time, continue to heat and reflux for 30min, and cool to room temperature to obtain nano-gold hydrosol;

[0039] (2) Centrifuge the nano-gold hydrosol prepared in step (1) (11800rpm, centrifuge for 30min), remove the supernatant, concentrate to 30-40mL, add 6mL of prepared TritonX-100 solution (0.01g / mL ), add deionized water according to the actual solution amount to make...

Embodiment 2

[0047] Prepare a kind of egg yolk-eggshell structure Au hollow carbon nanosphere composite material according to the following steps:

[0048] (1) Weigh 0.0216g of HAuCl 4 Dissolve in 237.5mL deionized water, add it to a 500mL three-necked flask equipped with a water conduit, reflux condenser, vacuum plug, and magnet, stir vigorously with a magnet, heat to reflux, and heat to boiling to obtain a chloroauric acid solution ; Weigh 0.125g of trisodium citrate and dissolve it in 12.5mL of deionized water to obtain an aqueous solution of sodium citrate, then quickly add it to the chloroauric acid solution at one time, continue to heat and reflux for 30min, and cool to room temperature to obtain nano-gold hydrosol;

[0049] (2) Centrifuge the nano-gold hydrosol prepared in step (1) (11800rpm, centrifuge for 30min), remove the supernatant, concentrate to 30-40mL, add 6mL of prepared TritonX-100 solution (0.01g / mL ), add deionized water according to the actual solution amount to make...

Embodiment 3

[0053] Prepare a kind of egg yolk-eggshell structure Au hollow carbon nanosphere composite material according to the following steps:

[0054] (1) Weigh 0.0216g of HAuCl 4 Dissolve in 237.5mL deionized water, add it to a 500mL three-necked flask equipped with a water conduit, reflux condenser, vacuum plug, and magnet, stir vigorously with a magnet, heat to reflux, and heat to boiling to obtain a chloroauric acid solution ; Weigh 0.125g of trisodium citrate and dissolve it in 12.5mL of deionized water to obtain an aqueous solution of sodium citrate, then quickly add it to the chloroauric acid solution at one time, continue to heat and reflux for 30min, and cool to room temperature to obtain nano-gold hydrosol;

[0055] (2) Centrifuge the nano-gold hydrosol prepared in step (1) (11800rpm, centrifuge for 30min), remove the supernatant, concentrate to 30-40mL, add 6mL of prepared TritonX-100 solution (0.01g / mL ), add deionized water according to the actual solution amount to make...

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Abstract

The invention discloses a yolk-eggshell structure Au@ hollow carbon nanosphere composite material and preparation and application thereof. A preparation method includes the following steps that sodium citrate is adopted for reducing chlorogoldacid, and nanogold hydrosol is prepared; the nanogold hydrosol, organic monomers, water and a Triton X-100 aqueous solution are stirred and mixed; then, an initiating agent is added into a system to initiate polymerization of the monomers, and precursors are prepared; the organic monomers are composed of aniline and pyrrole; and under the inert atmosphere, the precursors are processed in a high-temperature carbonizing manner so that the yolk-eggshell structure Au@ hollow carbon nanosphere composite material can be prepared. According to the preparation method, the tedious steps that a template is prepared, complicated surface modification is needed and the template is removed are not needed, and preparation is easy and convenient. The specific surface area and the size of the prepared material can be regulated and controlled through the carbonization condition and the concentration of the organic monomers, the specific surface area is high, and the prepared material has a good catalytic effect on nitrobenzene and p-nitrophenol.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to an egg yolk-eggshell structure Au hollow carbon nanosphere composite material and its preparation and application. Background technique [0002] Egg yolk-eggshell nanocomposites, especially noble metal hollow carbon nanospheres, are an important class of advanced materials. They have unique nanoshells and noble metal nanoparticles loaded in nanohollow cavities. It has broad application prospects in the fields of equipment, environment, and biomedicine. [0003] So far, noble metal hollow carbon nanospheres with egg yolk-eggshell structure are usually prepared by template method, which includes the preparation of noble metal nanoparticles, step-by-step coating of protein template layer and carbon source shell layer, subsequent carbonization and template removal. However, the template method generally has the following insurmountable shortcomings: (1) Complex surface...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/02
Inventor 吴丁财徐飞马俊豪黄智科符若文卢宇恒
Owner SUN YAT SEN UNIV
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