Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nanometer Cu0/Fe3O4 compound, method for preparing same and application of nanometer Cu0/Fe3O4 compound to treating organic wastewater by means of catalytically activating molecular oxygen

A technology of organic wastewater and catalytic activation, applied in the interdisciplinary field, can solve the problem of low catalyst activity and achieve the effects of wide application value, high catalytic activity and wide sources

Inactive Publication Date: 2016-10-26
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the catalyst activity of the existing molecular oxygen activation catalyst is not high during use and is only effective at acidic pH, and provides a catalyst with simple preparation process, cheap and easy-to-obtain raw materials, high catalytic activity, wide application range of pH, and easy Recovered zero-valent copper / iron tetroxide (Cu 0 / Fe 3 o 4 ) composite catalyst, which can efficiently activate molecular oxygen at room temperature and pH3-11, and rapidly degrade and mineralize various organic pollutants

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nanometer Cu0/Fe3O4 compound, method for preparing same and application of nanometer Cu0/Fe3O4 compound to treating organic wastewater by means of catalytically activating molecular oxygen
  • Nanometer Cu0/Fe3O4 compound, method for preparing same and application of nanometer Cu0/Fe3O4 compound to treating organic wastewater by means of catalytically activating molecular oxygen
  • Nanometer Cu0/Fe3O4 compound, method for preparing same and application of nanometer Cu0/Fe3O4 compound to treating organic wastewater by means of catalytically activating molecular oxygen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to Cu(NO 3 ) 2 ·3H 2 O and Fe(NO 3 ) 3 9H 2O molar ratio is the ratio of 1:3, weigh 5mmol Cu(NO 3 ) 2 ·3H 2 O and 15mmol Fe(NO 3 ) 3 9H 2 O, dissolved in 55mL of ethylene glycol, stirred at 25°C for 120min; transferred the obtained mixture to a polytetrafluoroethylene reactor with a capacity of 100ml, and reacted at 180°C for 24h to obtain a black precipitate; Separation by centrifugation, washing the obtained black precipitate with deionized water until the cleaning solution is neutral, that is, nano-Cu 0 / Fe 3 o 4 Composite (Cu 0 / Fe molar ratio content is 1:3). It was confirmed by XRD and SEM that the prepared catalyst was indeed nano-Cu 0 / Fe 3 o 4 Compounds such as figure 1 As shown, the particle size is about 50-70nm, such as figure 2 shown.

Embodiment 2

[0033] 5 mg L in 50 mL -1 Add HNO to the rhodamine B aqueous solution 3 or NaOH to adjust the pH value to 7.0, and feed air so that the molecular oxygen concentration in water is 2.0mg / L, add the Cu prepared in 50mg embodiment 1 0 / Fe 3 o 4 Composite catalyst (Cu 0 / Fe molar ratio content is 1:3), mechanical stirring at room temperature. After 40min, the degradation rate of Rhodamine B was 99%, as image 3 As shown, the total organic carbon (TOC) dropped by 55%.

[0034] Under the same experimental conditions, the concentration in two cups of 50mL is 5mg L -1 Add 50mgCu to Rhodamine B wastewater 0 and 50mg Fe 3 o 4 Catalyst, after reacting for 40min, Cu 0 Catalyst has a degradation rate of 25% for Rhodamine B, Fe 3 o 4 Catalyst has a degradation rate of Rhodamine B of 33%, Cu 0 The catalyst corresponds to a 6% drop in total organic carbon (TOC), Fe 3 o 4 The catalyst corresponds to a 14% drop in total organic carbon (TOC).

Embodiment 3

[0036] According to Cu(NO 3 ) 2 ·3H 2 O and Fe(NO 3 ) 3 9H 2 O molar ratio is the ratio of 1:7, weighs 2.5mmol Cu (NO 3 ) 2 ·3H 2 O and 17.5mmol Fe(NO 3 ) 3 9H 2 O, dissolved in 55mL of ethylene glycol, stirred at 60°C for 30min; transferred the obtained mixture to a polytetrafluoroethylene reactor with a capacity of 100ml, and reacted at 150°C for 96h to obtain a black precipitate; Separation by centrifugation, washing the obtained black precipitate with deionized water until the cleaning solution is neutral, that is, nano-Cu 0 / Fe 3 o 4 Composite (Cu 0 / Fe molar ratio content is 1:7).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a nanometer Cu0 / Fe3O4 compound, a method for preparing the same and application of the nanometer Cu0 / Fe3O4 compound to treating organic wastewater by means of catalytically activating molecular oxygen. The method for preparing the nanometer Cu0 / Fe3O4 compound includes (1), adding Cu(NO3)2 3H2O and Fe (NO3)3 9H2O into ethylene glycol according to a molar ratio of (0.05-20):1, dissolving the Cu(NO3)2 3H2O and the Fe (NO3)3 9H2O in the ethylene glycol and stirring the Cu(NO3)2 3H2O and the Fe (NO3)3 9H2O at the temperature of 25-60 DEG C for 30-120 min to obtain mixed liquid; (2), transferring the mixed liquid obtained at the step (1) into a polytetrafluoroethylene reaction kettle and keeping the mixed liquid in the polytetrafluoroethylene reaction kettle at the temperature of 150-200 DEG C for 12-96 h to obtain black precipitates; (3), separating the black precipitates obtained at the step (2) by the aid of centrifugal separation processes, and cleaning the black precipitates by the aid of deionized water until cleaning liquid is neutral so as to obtain the nanometer Cu0 / Fe3O4 compound. The nanometer Cu0 / Fe3O4 compound, the method and the application have the advantages that the nanometer Cu0 / Fe3O4 compound is used as a catalyst, air or oxygen is used as an oxidizing agent, the oxygen is activated to generate active oxygen such as H2O2 and hydroxyl radicals, organic pollutants in water can be degraded, and the nanometer Cu0 / Fe3O4 compound and the method are high in efficiency, wide in pH (potential of hydrogen) application range (pH ranges from 3 to 11) and easy to implement and are environmentally friendly; processes for preparing nanometer Cu0 / Fe3O4 compound which is the catalyst are simple, the nanometer Cu0 / Fe3O4 compound and the method are low in cost, the nanometer Cu0 / Fe3O4 compound is magnetic and can be recycled by the aid of magnets, and the like.

Description

technical field [0001] The invention relates to the interdisciplinary field of materials, chemistry and environment, and specifically discloses a nanometer zero-valent copper / iron tetroxide (Cu 0 / Fe 3 o 4 ) compound catalyzes the method for activating molecular oxygen to treat organic wastewater. technical background [0002] Fenton reaction (Fe 2+ and H 2 o 2 ) is the most commonly used advanced oxidation technology, which can catalyze the generation of strong oxidizing hydroxyl radicals (OH), and is suitable for the treatment of various refractory organic pollutants such as dyes, phenols, and antibiotics. However, the Fenton reaction is generally only suitable for acidic systems with a pH less than 3, and the pH of most wastewater is between 6 and 9. Therefore, before using the Fenton reaction to treat organic matter, the wastewater needs to be acidified, which increases the treatment cost. Meanwhile, the Fenton reaction usually starts with H 2 o 2 As the source o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/745C02F1/72C02F1/74
CPCC02F1/727C02F1/74B01J23/745B01J37/03C02F2305/026C02F2305/023C02F2101/308C02F2101/36C02F2101/345C02F2101/38B01J35/40
Inventor 丁耀彬唐和清阮玉凤
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com