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Method for green synthesis of magnetic nanometer Fe3O4 particles from water hyacinth and application

A magnetic nano, green synthesis technology, applied in the direction of microorganism-based methods, nanotechnology, biochemical equipment and methods, etc., can solve the problems that have not yet been seen in magnetic nano

Active Publication Date: 2020-10-30
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no magnetic nano-Fe has been prepared using water hyacinth as raw material. 3 o 4 Particles (Fe 3 o 4 -NPs) research report

Method used

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  • Method for green synthesis of magnetic nanometer Fe3O4 particles from water hyacinth and application
  • Method for green synthesis of magnetic nanometer Fe3O4 particles from water hyacinth and application
  • Method for green synthesis of magnetic nanometer Fe3O4 particles from water hyacinth and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Prepare magnetic nano-Fe as follows 3 o 4 Particles:

[0035] (1) Take 5g of fresh water hyacinth leaves and wash them with tap water and distilled water successively, put them in a mortar, grind the leaves into mud with a pestle to obtain the extract, add 100mL of distilled water to wash the extract for 3 to 5 times, combine and transfer to in a beaker, further heated and boiled for 10 minutes, filtered after cooling and adjusted to 100mL to obtain water hyacinth leaf extract.

[0036] (2) At room temperature, add a 1:1 volume of iron salt solution to the prepared water hyacinth leaf extract, Fe in the iron salt solution 3+ and Fe 2+ The total concentration of Fe is 0.2mol / L, Fe 3+ : Fe 2+ The molar ratio is 2:1, the obtained mixture is placed on a constant temperature magnetic stirrer, and the newly prepared 1mol / L NaOH solution is added dropwise while stirring until the pH value is adjusted to 7, the reaction is continuously stirred at 55°C for 1h,...

Embodiment 2

[0039] (1) Take 5g of fresh water hyacinth leaves and wash them with tap water and distilled water successively, put them in a mortar, grind the leaves into mud with a pestle to obtain the extract, add 100mL of distilled water to wash the extract for 3 to 5 times, combine and transfer to in a beaker, further heated and boiled for 10 minutes, filtered after cooling and adjusted to 100mL to obtain water hyacinth leaf extract. (2) At room temperature, add 1:1.5 volume of iron salt solution to the prepared water hyacinth leaf extract, Fe in the iron salt solution 3+ and Fe 2+ The total concentration of Fe is 0.2mol / L, Fe 3+ : Fe 2+ The molar ratio is 2:1, the obtained mixed solution is placed on a constant temperature magnetic stirrer, and the newly prepared 1mol / L NaOH solution is added dropwise while stirring until the pH value is adjusted to 7, the reaction is continuously stirred at 55°C for 1h, and then added dropwise 1mol / L NaOH solution until the pH value is 11, and cont...

Embodiment 3

[0041] (1) Take 5g of fresh water hyacinth leaves and wash them with tap water and distilled water successively, put them in a mortar, grind the leaves into mud with a pestle to obtain the extract, add 100mL of distilled water to wash the extract for 3 to 5 times, combine and transfer to in a beaker, further heated and boiled for 10 minutes, filtered after cooling and adjusted to 100mL to obtain water hyacinth leaf extract. (2) At room temperature, add 1:2 volume of iron salt solution to the prepared water hyacinth leaf extract, Fe in the iron salt solution 3+ and Fe 2+ The total concentration of Fe is 0.2mol / L, Fe 3 + : Fe 2+ The molar ratio is 2:1, the obtained mixed solution is placed on a constant temperature magnetic stirrer, and the newly prepared 1mol / L NaOH solution is added dropwise while stirring until the pH value is adjusted to 7, the reaction is continuously stirred at 55°C for 1h, and then added dropwise 1mol / L NaOH solution until the pH value is 11, and cont...

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Abstract

The invention discloses a method for green synthesis of magnetic nanometer Fe3O4 particles from water hyacinth and application. The preparation method comprises the following steps: mixing an extractof fresh leaves of the water hyacinth with 0.2 mol / L Fe<3+> and Fe<2+> solutions, adjusting a pH value twice, conducting continuous stirring for a reaction, further performing permanent magnet separation, carrying out suction filtration, carrying out washing with absolute ethyl alcohol and distilled water, and successively carrying out vacuum drying, grinding and sieving so as to obtain the environment-friendly synthesized magnetic nanometer Fe3O4 particles. The magnetic nanometer Fe3O4 particles s with a certain concentration synthesized by the method are added into a system for hydrogen production through fermentation of a straw hydrolysate, and have a remarkable effect of promoting the synthesis of biological hydrogen and the utilization of hydrolyzed sugar, so accumulated hydrogen yield, glucose utilization rate and xylose utilization rate obtained under the optimal addition concentration are respectively improved by 22.6%, 6.5% and 6.7% compared with control treatment. The methodhas the advantages of environmental protection performance, simple and feasible process, mild preparation conditions, cheap and easily available raw materials and the like.

Description

technical field [0001] The present invention relates to the preparation method and application field of magnetic nanomaterials, in particular to the green synthetic magnetic nano-Fe of water hyacinth 3 o 4 Particle and application, especially relate to the magnetic nanometer Fe that is prepared by water hyacinth leaf extract 3 o 4 The application effect of particles in regulating the hydrogen production of lignocellulose hydrolyzate by bacterial fermentation is applied in the field of efficient synthesis and regulation of biohydrogen energy. Background technique [0002] Nano Fe 3 o 4 The traditional preparation of the traditional method is based on physical and chemical synthesis methods. At present, the commonly used co-precipitation method is to add an appropriate precipitant to a soluble salt solution containing two or more metal particles, so that the metal particles can be uniformly precipitated or crystallized. After dehydration or thermal decomposition, nano pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08H01F41/02B82Y40/00C12P3/00C12R1/22
CPCC01G49/08C12P3/00H01F41/0253C01P2006/42C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/64C12P2203/00Y02E60/36
Inventor 李艳宾张琴丁鹏飞张永贵童旭
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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