Preparation method of silver/carbon composite hollow nanospheres

A hollow nano-carbon composite technology, which is applied in the preparation of microspheres, microcapsule preparations, etc., to achieve the effect of improving utilization efficiency, uniform size distribution, and exquisite design

Active Publication Date: 2015-08-26
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silver-carbon composite hollow nanosphere materials have not been reported so far.

Method used

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  • Preparation method of silver/carbon composite hollow nanospheres
  • Preparation method of silver/carbon composite hollow nanospheres
  • Preparation method of silver/carbon composite hollow nanospheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The first step: configure 0.025M silver nitrate solution and 0.25M glucose aqueous solution respectively;

[0018] Step 2: Take 30ml of the above solutions and mix them under magnetic stirring;

[0019] Step 3: Slowly add 0.5ml trioctylamine dropwise to the above mixed solution while stirring;

[0020] Step 4: Put the above solution into an ultrasonic cleaner for 15 minutes;

[0021] Step 5: Quickly transfer the above suspension to a 100ml polytetrafluoroethylene-lined stainless steel reaction kettle, and react at 180°C for 12h;

[0022] Step 6: After the reaction kettle is naturally cooled to room temperature, the reaction solution is centrifuged to obtain black solid particles;

[0023] Step 7: Alternately and repeatedly wash the precipitate with water and absolute ethanol 3 times each, and vacuum dry at 60°C for 10 hours to obtain hollow nanospheres; figure 2 In order to characterize the structure of the obtained silver / carbon composite hollow nanospheres, the Ra...

Embodiment 2

[0025] The first step: configure 0.025M silver nitrate solution and 0.25M glucose aqueous solution respectively;

[0026] Step 2: Take 30ml of the above solutions and mix them under magnetic stirring;

[0027] Step 3: Slowly add 0.5ml trioctylamine dropwise to the above mixed solution while stirring;

[0028] Step 4: Put the above solution into an ultrasonic cleaner for 15 minutes;

[0029] Step 5: quickly transfer the above suspension to a polytetrafluoroethylene-lined stainless steel reactor (total volume is 100ml), and react at 180°C for 10h;

[0030] Step 6: After the reaction kettle is naturally cooled to room temperature, the reaction solution is centrifuged to obtain black solid particles;

[0031] Step 7: alternately and repeatedly wash the precipitate with water and absolute ethanol for 3 times, and vacuum-dry at 60°C for 10 hours to obtain hollow nanospheres;

[0032] attached image 3 The XRD spectrum is the structural characterization of the obtained silver / car...

Embodiment 3

[0035] The first step: configure 0.025M silver nitrate solution and 0.50M glucose aqueous solution respectively;

[0036] Step 2: Take 30ml of the above solutions and mix them under magnetic stirring;

[0037] Step 3: Slowly add 0.75ml trioctylamine dropwise while stirring in the above mixed solution;

[0038] Step 4: Put the above solution into an ultrasonic cleaner for 15 minutes;

[0039] Step 5: Quickly transfer the above suspension to a polytetrafluoroethylene-lined stainless steel reactor (total volume is 100ml), and react at 180°C for 20h;

[0040] Step 6: After the reaction kettle is naturally cooled to room temperature, the reaction solution is centrifuged to obtain black solid particles;

[0041] Step 7: Alternately and repeatedly wash the precipitate with water and absolute ethanol for 3 times, and vacuum-dry at 60°C for 10 hours to obtain silver-carbon composite nano hollow spheres;

[0042] Step 8: The product is annealed at 500° C. at a heating rate of 10° C. / ...

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Abstract

The invention discloses a preparation method of silver / carbon composite hollow nanospheres. According to the method, under a stirring condition, a glucose solution is added into a silver nitrate aqueous solution; a proper amount of trioctylamine is slowly dropped in while stirring is carried out; the mixed solution is subjected to ultrasonic dispersion, such that a milky while solution is obtained; the emulsion obtained after ultrasonic treatment is delivered into a reaction kettle, and a hydrothermal reaction is carried out; when the reaction is finished, the obtained product is cooled to room temperature; centrifugal separation is carried out, such that black solid particles are obtained; washing and drying are carried out; and annealing is carried out under the protection of argon gas, such that the composite hollow nanospheres are obtained. The material has good application prospects in the aspects of surface-enhanced Raman scattering, antibiosis and the like.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, and relates to a method for preparing silver / carbon composite hollow nanospheres with high specific surface area. Background technique [0002] The development of nanotechnology depends largely on the ability to synthesize new nanomaterials with specific structural and functional properties. Hollow nanosphere is such a new type of nanomaterial with a specific structure. Due to its special shape, low density, large specific surface area and high porosity, its development and research have attracted the attention of researchers in many fields. For example, it can be used as a unique drug carrier or used in contrast agents by taking advantage of its hollow structure and good fluidity; it can be used in catalysts, fuel cells, etc. by taking advantage of its large specific surface area; it can also be used as a light Quality structural materials, heat insulation, sound insulation and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 江晓红姜鹏鹏孙晋国陈琪黄颖新黄敏蔡晓霞陆路德
Owner NANJING UNIV OF SCI & TECH
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