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

A technology of yeast cells and catalysts, which is applied in the preparation of amino compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Preparation time, high catalytic activity, and the effect of enhancing adsorption performance

Active Publication Date: 2016-03-23
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Yeast cell culture and treatment: As described above, yeast cells were cultured in shake flasks, and then the yeast were collected and washed.

[0063] Add Tween-80 with a mass percentage concentration of 0.1-5%, shake at 40-60°C at 100r / min for 24-48 hours, centrifuge, wash, and freeze-dry to obtain the modified yeast cell carrier .

[0064] Preparation of gold nanocatalysts stable in yeast cells: Add 5.0mL2mmol / L of chloroauric acid solution and 5.0mL1mol / L sodium hydroxide solution into 100mg of chemically treated modified yeast cell carrier, mix thoroughly, and place at 37 In an air bath shaker at ℃, react in the dark at 100r / min for 24h, centrifuge at 3000r / min for 10min, wash with twice distilled water for 3 times, and freeze-dry.

Embodiment 2

[0066] The preparation steps of cultivating and treating yeast and yeast cell-stabilized gold nanocatalyst are the same as in Example 1, except that the added chemical reagent is TritonX-100 with a concentration of 0.1-5% by mass.

Embodiment 3

[0068] The preparation steps of cultivating and treating yeast and the stable gold nanocatalyst of yeast cells are the same as in Example 1, except that the added chemical reagent is cetyltrimethylammonium bromide with a concentration of 0.1-5% by mass.

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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...

Claims

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Application Information

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IPC IPC(8): B01J23/52C02F1/70C07C215/76C07C209/36
CPCB01J23/52C02F1/70C02F2101/18C02F2101/30C07C209/36C07C215/76
Inventor 石国荣何紫君
Owner HUNAN AGRICULTURAL UNIV
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