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Composite nano-metal materials and methods prepared by combining with ordered porous supports or rough surfaces

A porous carrier and nano-metal technology, which is applied in the field of nano-materials, can solve the problems of difficult release of nano-metal particles, and achieve excellent surface Raman enhancement performance, uniform particle size, and small particle size.

Inactive Publication Date: 2017-01-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite material prepared by the invention has a one-dimensional photonic crystal structure and excellent surface Raman enhancement performance, and at the same time solves the problem of difficult release of nano-metal particles from the carrier

Method used

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  • Composite nano-metal materials and methods prepared by combining with ordered porous supports or rough surfaces
  • Composite nano-metal materials and methods prepared by combining with ordered porous supports or rough surfaces
  • Composite nano-metal materials and methods prepared by combining with ordered porous supports or rough surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 0.005mol / L silver nitrate (AgNO 3 ) solution is sprayed on the porous alumina carrier, placed between the two electrode plates of the plasma, sealed, the vacuum chamber is evacuated, and then filled with argon as the discharge gas, maintaining a pressure of 200Pa, and applying 300V on the electrode AC voltage, reduction of AgNO using glow discharge plasma 3 , the plasma temperature is 50°C, and the reduction time is 3min. This process can be repeated different times to prepare nano-metal particle aggregates with different sizes and loads. The nano-metal particles of the sample are combined with the pores of the porous carrier to form a photonic crystal structure that is periodically arranged in an orderly manner. When the incident light is irradiated from different angles, it will show different colors. At the same time, the surface of the porous carrier roughened by the nano-metal particles It has excellent surface Raman enhancement performance, and the Raman enhance...

Embodiment 2

[0056] 0.001mol / L chloroauric acid (HAuCl 4 ) solution is sprayed on the porous alumina carrier, then placed between the two electrode plates of the plasma discharger, sealed, the vacuum chamber is evacuated, and then filled with air as the discharge gas, maintaining a pressure of 200Pa, applying A DC voltage of 500 V was used to reduce chloroauric acid (HAuCl 4 ), the temperature of the plasma is 25°C, and the reduction time is 5min, and uniform gold metal particle accumulations are prepared. This process can be repeated different times to prepare nano-metal particle aggregates with different sizes and loads. The nano-metal particles of the sample are combined with the pores of the porous carrier to form a photonic crystal structure that is periodically arranged in an orderly manner. When the incident light is irradiated from different angles, it will show different colors. At the same time, the surface of the porous carrier roughened by the nano-metal particles It has exce...

Embodiment 3

[0061] 0.005mol / L chloroauric acid (HAuCl 4 ) and the same concentration of palladium nitrate (Pd(NO 3 ) 2 ) The mixed solution is sprayed on the porous alumina, then placed between the two electrode plates of the plasma, sealed, the vacuum chamber is evacuated, and then filled with argon as the discharge gas, maintaining a pressure of 500Pa, and applying 800V on the electrode AC voltage of HAuCl reduction by glow discharge plasma 4 and Pd(NO 3 ) 2 , the plasma temperature is 100°C, and the reduction time is 5min. Chlorauric acid (HAuCl 4 ) solution and palladium nitrate (Pd(NO 3 ) 2 ) mixed solution was sprayed on the sample, and then spraying and plasma treatment were repeated 9 times under the same conditions to prepare gold-palladium alloy nano-metal particle agglomerates. The nano-metal particles of the sample are combined with the pores of the porous carrier to form a periodic and ordered photonic crystal structure, which will show different colors when the incid...

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Abstract

The invention relates to the technical field of nano materials, and particularly relates to composite nano metal materials prepared in combination with an ordered porous support or a rough surface and a method thereof. A nano metal particle cluster is combined with the ordered porous support or the rough surface, wherein the particle size of the nano metal particle is 2-10 nm, the particle size of the nano metal particle cluster is 20-200 nm and the pore diameter of the porous support is 20-200 nm. The method comprises the following steps of spraying platinum, or palladium or gold or silver salt or the metal salt solution of the mixture of the above metal salts on the porous support; directly loading the support into a cold plasma discharger, and introducing plasma discharge gas; using direct current or alternating current applied to the two ends of an electrode by a high voltage power supply to make the discharge gas discharge, reducing the metal salts attached to a porous support channel and the surface into an elemental nano metal particle cluster by the formed plasma. The nano metal particle cluster of the invention has a controllable size, good uniform dispersion and excellent performance, so that the invention can be widely applied in the fields of photonic crystals, electrodes, catalysts and the like.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a method for preparing nanometer metal materials by compounding with ordered porous carriers or rough surfaces. Background technique [0002] Nanomaterials refer to materials with at least one dimension in the nanoscale range (1-100nm) or composed of them as basic units in three-dimensional space, which is approximately equivalent to the scale where 10-100 atoms are closely arranged together. Nanoparticles and nanoparticle aggregates are typical mesoscopic systems, which have surface effects, small size effects, and macroscopic quantum tunneling effects. When people subdivide a macroscopic object into ultrafine particles (nanoscale), it will show many strange properties, that is, its optical, thermal, electrical, magnetic, mechanical and chemical properties are compared with those of macroscopic solids. will be significantly different. Therefore, metal nanoparticles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24
Inventor 刘昌俊王巍杨嫚嫚王召张瑶
Owner TIANJIN UNIV
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