Method for preparing nanometer copper through chemical reduction method

Abstract

A nanometer material refers to the material with at least one dimension located within the nanometer scale range, and the range is usually 1-100nm. The granularity of nanometer-level ultra-fine powder is also extremely low, and the number of atoms on the surface of the power and the number of atoms on the interface of the power can be compared with the number of atoms inside the power, so that the chemical property of the powder is very active and the interface effect and the surface effect are increased abnormally. The small size effect, the quantum size effect and the surface effect are all very obvious. Nanometer copper powder is not prone to oxidization, and in a copper catalytic system and a copper conductive system, the catalytic performance and the conductive performance can be greatly enhanced due to the performance of the copper powder in the aspect of oxidization. Due to the quantum size effect of the nanometer material and the macroscopic quantum tunneling effect of the nanometer material, when the nanometer copper powder is dispersed in a plurality of mediums, abnormal strong catalytic and conductive performances are shown, and important applications can be developed. The specific surface area of the nanometer copper powder is large, surface active centers are many, and therefore the nanometer copper powder is a good catalyst in metallurgy and petroleum chemical industries.

Description

technical field [0001] The invention relates to a method for preparing nano copper by a chemical reduction method. Background technique [0002] Nanomaterials refer to at least one dimension in the nanoscale range, generally 1-100nm. The particle size of nanoscale ultrafine powder is also extremely fine. The number of atoms on the surface and interface can be compared with the number of atoms in the body, resulting in its chemical properties. Very lively, the interface and surface effects are abnormally increased. Small size effect, quantum size effect, and surface effect are all very obvious. Nano-copper powder is not easy to oxidize. In the copper catalytic system and copper conductive system, its performance in this aspect can be improved to greatly increase the catalytic and conductive properties. Due to the quantum size effect and macroscopic quantum tunneling effect of nanomaterials, nano-copper dispersed in many media exhibits exceptionally strong catalytic and elec...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the remaining active metal powder reducing agent is not easy to clean after the reaction is completed, which can affect the purity of nano-copper powder. This patent does not use active metal powder as reducing agent, but uses hypophosphorous acid which is easily soluble in water Sodium is used as reducing agent, and at the same time, polyacrylic acid emulsion with low molecular weight, which is easily soluble in water, is used as dispersant, so that the prepared nano-copper powder can be well dissolved in water-based system, easy to clean, and has high purity

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