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Preparation method for hollow nano metal

A hollow nano-metal technology, which is applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of difficult adjustment of the size of hollow nano-metals, poor shape and monodispersity of hollow nano-metals, etc. Low price, good monodispersity effect

Inactive Publication Date: 2013-08-07
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, the size of the hollow nano metal is not easy to adjust, the monodispersity is not good and it is easy to agglomerate, the shape of the hollow nano metal is not good, and the process is complicated.

Method used

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  • Preparation method for hollow nano metal
  • Preparation method for hollow nano metal
  • Preparation method for hollow nano metal

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Dissolve 0.2 g of glucose in 10 g of water, pour it into a three-necked flask, add 1 g of AOT and 100 ml of benzene, put it into the rotor, put the three-necked flask into an oil bath and stir. Raise the temperature of the oil bath to 100°C until the system is clear. Weigh 0.14 g of triphenylphosphine and dissolve it in 2 ml of benzene, then add 0.05 g of silver nitrate for complexation, complex the silver nitrate and triphenylphosphine, and then add it to a clear solution at 70°C for reaction. After reacting for 6 hours, take out the sample. After being centrifuged at 10,000 rpm by a centrifuge, the precipitate was taken, and the glucose was washed away with water and then centrifuged to obtain spherical hollow nano-silver. The average size of the hollow silver nanoparticles is 30nm, and the wall thickness is 2nm. Microemulsion-assisted preparation of hollow silver nanoparticles transmission electron microscope images such as figure 1 shown. figure 2 It is the XRD ...

Embodiment example 2

[0027] Dissolve 0.4 g of glucose in 2 g of water, pour it into a three-necked flask, add 0.78 g of n-octylamine and 16 ml of petroleum ether, put it into the rotor, put the three-necked flask into an oil bath and stir. Raise the temperature of the oil bath to 60°C and azeotrope until the system is clear. Weigh 0.17 grams of silver nitrate, complex the silver nitrate with 1.56 grams of n-octylamine, and add it to the clear solution at 0°C. After reacting for 3 hours, take out the sample, centrifuge at 8500 rpm in a centrifuge, and get the precipitate. Glucose was washed away with water and then centrifuged to obtain cubic hollow nano-silver. The average size of the hollow silver nanoparticles is 200nm, and the wall thickness is 50nm. image 3 is the TEM image of cubic hollow silver nanoparticles. Figure 4 It is the XRD spectrum of cubic hollow nano silver. The XRD pattern shows five obvious absorption peaks of nano-silver, corresponding to (111), (200), (220), (311), (222) ...

Embodiment 3

[0030] Dissolve 1 gram of fructose in 10 grams of water, pour it into a three-necked flask, add 0.1 gram of AOT and 100ml of benzene, put it into the rotor, put the three-necked flask into an oil bath and stir. Raise the temperature of the oil bath to 20°C and azeotrope until the system is clear. Weigh 0.05 g of chloroauric acid, complex the chloroauric acid with 0.1 gram of triphenylphosphine and add it to a clear solution at 80 ° C. After reacting for 3 hours, take out the sample and centrifuge at 12000 rpm to get the precipitate. Fructose was washed away with water and then centrifuged to obtain spherical hollow gold nanoparticles. The average diameter of the hollow gold nanoparticles is 100nm, and the wall thickness is 10nm.

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Abstract

The invention relates to a preparation method for hollow nano metal, which comprises the following steps: a), reducing agent is dissolved into deionized water firstly, then is mixed with organic solvent and surface active agent, and stirring is performed for preparing microemulsion; b), water inside a system is evaporated through azeotropic distillation till the solution is clear and colorless, and at the moment, and the reducing agent is coated with the surface active agent and exist in the system in a state of monodispersed nano particles; c), metallic compound is added into the system after getting complexing through complexant, and metal is obtained through the reduction of the metallic compound on the surface of the reducing agent; and d), centrifugal separation is performed on the system after reduction reaction, precipitation is taken, and the hollow nano metal can be obtained through centrifugation after water washing. A micro-emulsion method is utilized for preparing the hollow nano metal in an assisting manner, and since the reducing agent is used as a hard template, the size and the appearance of the hollow nano metal can be effectively controlled. The prepared hollow nano metal has excellent monodispersity and is uniform in size.

Description

technical field [0001] The invention relates to a method for preparing hollow nanometer metal. Background technique [0002] Metal nanomaterials have unique physical and chemical properties and have broad application prospects in the fields of optics, electricity, catalysis and magnetism. (Alivisatos A P.J.Phys.Chem., 1996,100:13226; Zhang B, Li J F, Zhong Q L, et a1., Langmuir, 2005,21:7449; Tian N, Zhou Z Y, Sun S G, et al., Science ,2007,316:732) Hollow nano metal materials are not only ideal materials for new catalysts due to their large specific surface area, controllable particle size, shell thickness, and adjustable composition, but also can be widely used in adsorption, diagnosis, Raman enhancement, etc. On the one hand, compared with traditional solid metal materials, the amount of metal used can also be reduced, so the cost can be greatly saved. [0003] At present, people have successfully prepared many hollow nanometals, such as gold, silver, platinum, etc., an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B01J13/02
Inventor 姜兴茂李根杨柳
Owner CHANGZHOU UNIV
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