Green tea extract-ferroferric oxide composite catalyst and application thereof

A technology of composite catalyst and ferroferric oxide, which is applied in the field of water treatment to achieve the effects of easy recycling, strong reducibility, and improved catalytic efficiency

Active Publication Date: 2016-06-22
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of a variety of toxic and harmful emerging organic micro-pollutants that are ubiquitous

Method used

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  • Green tea extract-ferroferric oxide composite catalyst and application thereof

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Embodiment 1

[0028] This embodiment provides a green tea extract-ferric oxide composite catalyst and a method for removing emerging organic pollutants in water by combining the composite catalyst with persulfate.

[0029] The preparation method of composite catalyst is as follows: 1) take by weighing 2.7gFeCl 3 ·6H 2 O, 7.2g NaAc, 2.0g polyethylene glycol 4000, dissolved in 80mL ethylene glycol. The mixed solution was magnetically stirred for 30 minutes to fully dissolve it, then added to a 100mL stainless steel autoclave lined with polytetrafluoroethylene, put the autoclave into an oven, raise the temperature to 200°C and keep it for 8-72 hours, then Naturally cool to room temperature.

[0030] 2) The obtained black solid was repeatedly washed several times with ethanol and ultrapure water, and placed in a vacuum oven at 60° C. for 12 hours to obtain ferric oxide powder.

[0031] 3) Weigh ferric iron tetroxide and green tea extract, put them in ultrapure water, ultrasonically disperse ...

Embodiment 2

[0037]The difference between this embodiment and Example 1 is that the dosage of the composite catalyst is 60 mg, and the removal rate of diuron reaches 89% after shaking for 60 minutes.

Embodiment 3

[0039] The difference between this embodiment and Example 1 is that the initial concentration of potassium hydrogen persulfate is 2.0 mM, and the removal rate of diuron reaches 82% after shaking for 60 minutes.

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Abstract

The invention discloses a green tea extract-ferroferric oxide composite catalyst and application thereof. A preparation method of the green tea extract-ferroferric oxide composite catalyst comprises the steps of dissolving FeCl3.6H2O, sodium acetate and polyethylene glycol into ethylene glycol, then placing the mixture into a reaction kettle, raising the temperature to 195-205 DEG C, preserving the temperature for 8-72 hours, and then conducting natural cooling to reach the room temperature, so that black solid is obtained; cleaning the black solid with ethanol and ultra-pure water respectively, and conducting vacuum drying, so that ferroferric oxide powder is obtained; weighing ferroferric oxide and green tea extract according to the mass ratio of 1: 5-5: 1, placing the ferroferric oxide and the green tea extract in the ultra-pure water, conducting ultrasonic treatment for 0.5-2 hours, and conducting solid-liquid separation; conducting vacuum drying on obtained solid, so that the green tea extract-ferroferric oxide composite catalyst is obtained, wherein the green tea extract is one or more of protocatechuic acid, epigallocatechin, gallate and epicatechin. The green tea extract has great reductibility, and ferroferric oxide catalysis efficiency can be improved; the composite catalyst is green and environmentally friendly and convenient to separate, and secondary pollution cannot be caused.

Description

technical field [0001] The invention relates to a green tea extract-ferric iron tetroxide composite catalyst and application thereof, belonging to the technical field of water treatment. Background technique [0002] In the past two decades, with the advancement of environmental detection technology and the enhancement of people's awareness of environmental protection, emerging organic pollutants in the water environment are increasingly attracting the attention of researchers all over the world. Emerging organic pollutants mainly include pharmaceuticals and personal care products, endocrine disruptors, brominated flame retardants, pesticides, algae toxins, and olfactory substances. The three most important characteristics are low concentration, many types, and complex properties. Moreover, the impact of emerging organic pollutants on humans and the environment not only depends on their concentration in the natural environment, but also is closely related to their persistenc...

Claims

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Application Information

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IPC IPC(8): B01J31/04B01J31/02B01J31/28C02F1/72C02F101/30
CPCB01J31/0201B01J31/0209B01J31/04B01J31/28C02F1/722C02F1/725C02F2101/30
Inventor 施周卜令君衣启航周石庆邓林毕晨
Owner HUNAN UNIV
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