Environmental-friendly preparation method for nanometer nickel

Abstract

The invention discloses an environmental-friendly preparation method for nanometer nickel. According to the method, a water-micromolecular alcohol hot method is used for carrying out preparation, andnanometer nickel powder is obtained. The environmental-friendly preparation method for the nanometer nickel comprises the following steps that firstly, soluble nickel salt serves as a raw material andis added into water to be stirred, a homogeneous solution is obtained, a certain amount of micromolecular alcohol is added, the mixture is stirred to be uniform, and under the stirring situation, alkali liquor is added, and stirring continues to be carried out; and secondly, the liquid and the solid obtained in the first step are transferred into a hydrothermal kettle, under the condition of 170DEG C-240 DEG C, after 6h-36h of hydrothermal treatment, the liquid and the solid are cooled to the room temperature, filtrate and black precipitate are obtained through filtering, the precipitate iswashed thoroughly through distilled water and ethyl alcohol and subjected to vacuum drying, and the nanometer nickel powder is obtained. According to the preparation method, the water-micromolecular alcohol hot method is used for carrying out preparation, the nanometer nickel powder is obtained, the raw materials are low in price and easy to obtain, and the using amount of the alcohol is small; according to the preparation method, it does not need to add a poisonous reducing agent, and environmental friendliness is achieved; and the product is easy to separate and collect, the preparation method and the technological process are simple, the industrial production is easy to achieve.

Description

technical field [0001] The invention relates to a green preparation method of nanometer nickel, and belongs to the technical field of nanometer material preparation. Background technique [0002] The production technology of ultrafine nickel powder belongs to the high-tech in the field of nanomaterial preparation. At present, the preparation methods of nanometer nickel powder mainly include vapor deposition method, electrolytic reduction method, hydrogen reduction method and liquid phase reduction method. Vapor deposition method refers to the preparation of nano-nickel powder by physical or chemical methods under controlled vacuum or reducing environmental conditions. This technology and process have high equipment requirements, high energy consumption and expensive production costs, making it difficult to achieve industrialized production; electrolytic reduction methods are obtained. The quality of the product is unstable, and the conditions are harsh and difficult to produ...

AI Technical Summary

Problems solved by technology

The main mechanism of the thermal reduction of ethylene glycol to prepare nano-metal elements is that ethylene glycol decomposes at high temperature to form acetaldehyde, which has strong reducibility and can reduce metal ions to metal elements. At present, there are many studies on this method, but there is still Not applied to production, due to the immature production process, nano-nickel powder is difficult to separate from viscous polyols

Bai Liuyang et al. reported the preparation of metal nickel powder by ethanol reduction (Bai Liuyang, Li Shaohua, Yuan Fangli, et al. Preparation of metal nickel powder and nickel-coated composite powder by ethanol reduction [J]. 2008), but in the preparation process Among them, the nickel salt is insoluble in ethanol, which is not conducive to mass transfer and hinders the effective progress of the reaction. The resulting sodium acetate crystals are difficult to separate from the nano-nickel powder. The solvent is all ethanol, and the preparation cost is high.

Images