Gold nano catalyst with stable yeast cells and preparation method and application thereof

Abstract

The invention provides a gold nano catalyst with stable yeast cells and a preparation method and application thereof, and relates to yeast cell culture and treatment and the preparation method and application of the gold nano catalyst. Yeast cells or chemically-treated modified yeast cells which are subjected to shake-flask culture on the appropriate condition are used as a carrier, a stabilizing agent and a reducing agent, chloroauric acid is reduced on the mild reaction condition, and therefore the gold nano catalyst with the stable yeast cells is prepared, wherein the gold nano catalyst is good in dispersity and stability, uniform in particle size distribution and good in catalytic activity for reduction of nitryl in nitro-compounds, hydrodechlorination of chlorinated organic compounds and degradation of dye and other organic pollutants. Particularly, according to the method, the particle size of gold nano particles can be effectively adjusted and controlled by controlling the reaction condition. The preparation technology is simple, the process is environmentally friendly, and the gold nano catalyst is widely used for reduction of the nitryl in the nitro-compounds, hydrodechlorination of the chlorinated organic compounds and degradation of the dye and other organic pollutants.

Description

technical field [0001] The present invention provides a yeast cell-stabilized gold nanocatalyst and its preparation method and application, relates to the method of yeast cell cultivation, treatment and catalyst preparation, and further relates to the yeast cell-stabilized gold nanocatalyst prepared by the method and Its application in catalyzing the reduction of nitro groups in nitro compounds, hydrodechlorination of chlorinated organic compounds and degradation of organic pollutants such as dyes. Background technique [0002] Nanoscale noble metal catalysts have a large specific surface area and high catalytic activity, and have broad application prospects in catalytic fields such as oil refining, petrochemical industry, organic synthesis, and degradation of environmental pollutants. Among them, the homogeneous nano-noble metal catalyst has the advantage of high activity, but it is difficult to separate and recover from the reaction system, which seriously restricts its in...

AI Technical Summary

Problems solved by technology

[0004] The green synthesis method of directly using biomolecules or biocompatible molecules such as liposomes, plant extracts or chitosan as reducing agents and stabilizers to prepare gold nanoparticles is complex in practice and requires high technical requirements for operators. Most require that the reaction temperature must be above 70°C

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