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Preparation method and application of Fe3O4-NH2@AgNPs composite material

A fe3o4-nh2, composite material technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, water/sludge/sewage treatment, etc., can solve mutagenic, teratogenic, pollution, etc. problem, to achieve the effect of stable performance, low cost and energy saving

Active Publication Date: 2018-08-10
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Certain dyes are carcinogenic, teratogenic, and mutagenic, and will cause serious pollution no matter they enter the environment from production, transportation, or use.

Method used

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  • Preparation method and application of Fe3O4-NH2@AgNPs composite material
  • Preparation method and application of Fe3O4-NH2@AgNPs composite material
  • Preparation method and application of Fe3O4-NH2@AgNPs composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Soak 10g of waste tea in 100mL of distilled water, boil at 60°C for 5min, filter out the extract, and set aside. waste tea extract and 1 mmol·L -1 The silver nitrate solution was mixed at a volume ratio of 1:4, stirred in a water bath at 60°C until the solution changed from yellow to dark brown, and the reaction was terminated. Place at room temperature for 24 hours, centrifuge at a high speed (8000r / min) for 15 minutes, put the precipitate into a glass bottle after centrifugation, dry at 80°C, and crush to obtain a brown solid, namely AgNPs, for later use;

[0027] (2) 2.0 g anhydrous sodium acetate, 1.0 g FeCl 3 ·6H 2 O and 7.0 g of 1,6-hexanediamine were dissolved in 30 mL of ethylene glycol, stirred vigorously until the mixed solution was clear, then transferred to a polytetrafluoroethylene autoclave, reacted at 160–200 °C for 6 h, and cooled to room temperature. After the product was repeatedly washed with water and ethanol, it was separated from the superna...

Embodiment 2

[0030] The five marked composite materials were used as catalysts, and hydrogen peroxide was used to catalyze the oxidation degradation of ethyl violet, malachite green and basic fuchsin aqueous solutions under natural light (this example takes ethyl violet as an example). After optimizing the experimental conditions (pH, time, temperature, usage of composite materials and hydrogen peroxide), measure the absorbance of the solution and calculate its degradation rate (each group of experiments was repeated three times to take the average value). The degradation rate of ethyl violet reached 99.1% within 30 minutes, and the degradation rate still reached about 98% after 10 times of recycling. The degradation rate of malachite green reaches 97%, and the degradation rate of basic fuchsin reaches 98%.

[0031] Catalytic degradation of ethyl violet, Fe 3 o 4 -NH 2 The appearance of the @AgNPs composite basically does not change much ( Figure 4 ), indicating that the prepared comp...

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Abstract

The invention discloses a preparation method and application of a Fe3O4-NH2@AgNPs composite material. The preparation method comprises the steps of preparing silver nanoparticles by using waste tea extract as a stabilizer and a reducing agent; then, using a one-pot method to prepare aminated Fe3O4 nanoparticles; finally, enabling carboxyl groups on the silver nanoparticles to react with amino groups to prepare the nanocomposite material. In the method, the composite material is successfully used for degradation of triphenylmethane dyes, and is stable in performance and reusable, thus having abetter application prospect and practical value. The composite material provided by the invention serves as a catalyst, and can be used for degrading ethyl violet, malachite green and basic fuchsin aqueous solutions in a way of catalytic oxidation by using hydrogen peroxide under the natural light. The degradation rate of ethyl violet reaches 99.1% within 30 minutes, and the degradation rate is still about 98% after 10 cycles of recycling. The degradation rate of malachite green reaches 97%, and the degradation rate of basic fuchsin reaches 98%.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control and composite material preparation, and specifically relates to a Fe 3 o 4 -NH 2 Preparation methods and applications of @AgNPs composites. Background technique [0002] With the wide application of organic dyes, the treatment of dye wastewater has become a global problem. Due to the stable structure of most dyes, the degradation effect of traditional dye wastewater treatment technology is not good. Therefore, there is an urgent need to develop cheaper, safer, and more suitable methods to remove dyes from printing and dyeing wastewater. [0003] Benzene dyes are polyphenylene ring compounds and are one of the most widely used dyes. Certain dyes are carcinogenic, teratogenic, and mutagenic, and will cause serious pollution no matter they enter the environment from production, transportation, or use. Fast, high-efficiency, low-cost, energy-saving nortriphenylmethane dye...

Claims

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Application Information

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IPC IPC(8): B01J31/28C02F1/72C02F101/30C02F101/32C02F101/36C02F101/38
CPCB01J31/28C02F1/722C02F1/725C02F2101/308C02F2101/32C02F2101/36C02F2101/38
Inventor 王勇刘绣华庆伟霞陈奎
Owner HENAN UNIVERSITY
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