Method for preparing nanogold through mango peel reducing agent

Abstract

The invention provides a method for preparing nanogold through a mango peel reducing agent. The method comprises the following steps: preparing a chloroauric acid solution; adjusting the pH value of the chloroauric acid solution; adding a mango peel reducing agent accounting for 2%-20% of the chloroauric acid solution according to volume ratio; performing water bath for 90-100 min under a certain condition; stopping the reaction when the color of the chloroauric acid solution turns into fuchsia from yellow; separating composite nanogold from the chloroauric acid solution through centrifugal separation; lastly, washing subnatant with distilled water and dehydrating; drying the the subnatant obtained through separation under a certain condition to obtain nanogold particles. According to the method, as the mango peels are prepared into as the reducing agent, the mango peels are changed from waste into valuable and the comprehensive utilization benefits of mangos are increased; compared with the prior art, the method has the advantages that steps are simple, the condition is mild, the preparing steps are simplified greatly and difficulties are reduced; no poisonous by-products are generated in the synthesizing processes, the yield of prepared nanogold particles can reach 90% above; the composite nanogold particles are even in sizes, narrow in particle size distribution, good in dispersity, low in possibility of gathering and more stable.

Description

technical field [0001] The invention relates to the field of biotechnology and nanometer research, in particular to a method for preparing nano gold by treating mango skin into a reducing agent and chloroauric acid. Background technique [0002] At present, the methods for preparing nano gold are mainly physical and chemical methods. The physical method refers to the direct conversion of gold into nanoparticles through various dispersion techniques; the chemical method refers to the reduction reaction of gold compounds to obtain nanoparticles. Both physical and chemical methods have the following problems: (1) relatively strict conditions are required; (2) high energy consumption; (3) the reagents used are expensive and have large toxic and side effects; (4) environmental pollution is relatively serious, which is harmful to the environment and Living organisms pose a potential hazard. With the popularity of the concept of green chemistry, the synthesis of gold nanoparticle...

AI Technical Summary

Problems solved by technology

Both physical and chemical methods have the following problems: (1) relatively strict conditions are required; (2) high energy consumption; (3) the reagents used are expensive and have large toxic and side effects; biohazardous

However, the current processing status has not been utilized, and most of the mango peels are discarded, which not only causes a huge waste of resources, but also pollutes the environment

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