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Plant reduction method for preparing silver Nano granules and gold Nano granules

A technology of silver nanoparticles and nanoparticles, which is applied in the field of preparing silver nanoparticles and gold nanoparticles by the plant reduction method, can solve the problems of easy pollution of the environment, slow reduction speed, troublesome microbial cultivation process, etc., and achieve simple process and good dispersion Effects on sex and stability

Inactive Publication Date: 2007-05-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the microbial reduction method can overcome the shortcomings of traditional chemical and physical methods such as high production costs and easy pollution of the environment, the reduction speed is slow in the process of preparing silver nanoparticles and gold nanoparticles by using microbial reduction methods, which is not conducive to industrialization. In the development of the process, it is sometimes necessary to add additives such as acids and alkalis to speed up the biological reduction reaction; in addition, the cultivation process of microorganisms is more troublesome, which is easy to cause bacterial contamination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Dried Cinnamomum camphora leaves are pulverized and sieved with 20 meshes to obtain Cinnamomum camphora leaf dry powder. Take by weighing 5g linoleum leaf dry powder, and the AgNO that concentration is 10mM 3 100ml of the solution was reacted in a 100ml Erlenmeyer flask, and the reaction was carried out on a water bath shaker at 40°C and 150r / min. After reacting for 118 hours, the obtained silver sol was observed with a transmission electron microscope (TEM), and the morphology of the silver nanoparticles was nearly spherical, most of the particle sizes were distributed in the range of 50-80 nm, and the average particle size was 64.8 nm.

Embodiment 2

[0015] Adopt the dry powder of camphor leaf in embodiment 1, take by weighing 1g dry powder of camphor leaf, be 10mM HAuCl with concentration 4 Solution 100ml reacts, and reaction temperature is 30 ℃, and other reaction conditions are the same as embodiment 1. Observing the sample gold sol with a transmission electron microscope, you can see a large number of triangular sheet-shaped gold nanoparticles with a clear shape. The thickness of the triangular sheet-shaped gold nanoparticles is within 20nm, the side length is 20-150nm, and the average side length is 80.0 nm.

Embodiment 3

[0017] Adopt the dry powder of Cinnamomum camphora leaf among the embodiment 1. Take by weighing 5g of cinnamon camphor leaf dry powder, and the HAuCl that concentration is 10mM 4 Solution 100ml reacts, and reaction temperature is 30 ℃, and other reaction conditions are the same as embodiment 1. Observing the gold sol with a transmission electron microscope (TEM), it can be observed that the morphology of the gold nanoparticles is spherical, and the particle size distribution of the obtained gold nanoparticles is 10-40 nm, with an average particle size of 23.4 nm.

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Abstract

A process for preparing Ag nanoparticles and Au nanoparticles by plant reducing method includes such steps as proportionally mixing the dried powder of camphor tree's leaf with the solution of silver nitrate (or chlorauric acid), and reacting at 15-60 deg.C to obtain Ag (or Au) nanoparticles.

Description

technical field [0001] The invention relates to a silver nanoparticle and a gold nanoparticle, in particular to a method for preparing the silver nanoparticle and the gold nanoparticle by a plant reduction method. Background technique [0002] Silver nanoparticles are widely used in many fields of industrial production because of their unique physical and chemical properties. For example, silver has always been the main component of ethylene epoxidation catalysts; elemental silver has a strong bactericidal ability, and the loaded silver is prepared into After adding nanometer particles, its bactericidal activity has been greatly improved. With its unique optical and electrical properties, good stability, small size and surface effect, and unique biological affinity, gold nanoparticles have shown potential application value in the fields of biochemical immunity and so on. The preparation methods of silver nanoparticles and gold nanoparticles have always been based on physica...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 李清彪黄加乐孙道华何宁邵文尧苏远波杨欣王惠璇王远鹏
Owner XIAMEN UNIV
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