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Application of novel MIL-53(Fe) based catalyst in removal of antibiotics in water

A catalyst and antibiotic technology, applied in the field of metal-organic framework materials, can solve the problems of MIL-53 morphology and structure changes, steric hindrance increase, etc., to increase light absorption performance and structural stability, prevent aggregation, and good photocatalysis Performance and Stability Effects

Inactive Publication Date: 2020-05-15
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Functionalized graphene oxide can serve as a template for the growth of MIL-53(Fe) units by providing dense nucleation sites, while high nuclei density leads to increased steric hindrance, leading to MIL-53(Fe) morphology and structural changes

Method used

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  • Application of novel MIL-53(Fe) based catalyst in removal of antibiotics in water
  • Application of novel MIL-53(Fe) based catalyst in removal of antibiotics in water
  • Application of novel MIL-53(Fe) based catalyst in removal of antibiotics in water

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Will contain 2.5mmol FeCl 3 ·6H 2 25ml of N,N-dimethylformamide solution of O was added dropwise to 4ml of N,N-dimethylformamide suspension containing graphene oxide at a concentration of 10mg / L, wherein the mass of graphene oxide accounted for 20% of the mass of MIL-53(Fe) in medium, after sonication, 25ml of N,N-dimethylformamide solution containing 100mM terephthalic acid was added dropwise to the above mixture and then sonicated for 2h, then 0.6mmol of FeCl 3 ·6H 2 O and 250 μl of ethylenediamine were dissolved in 5 ml of N,N-dimethylformamide at a material ratio of 3:1, and finally, the mixed solution was added dropwise to the previous mixture, and sonicated to a homogeneous mixture. The resulting mixture was transferred to a polytetrafluoroethylene-lined autoclave and kept at 150 °C for 15 h. After cooling to room temperature, it was centrifuged at 8000 r / min for 5 min and washed with N,N-dimethylformamide and methanol respectively. Three times, vacuum drying a...

Embodiment 2

[0032] Will contain 2.5mmol FeCl 3 ·6H 2 25ml of N,N-dimethylformamide solution of O was added dropwise to 10ml of graphene oxide-containing N,N-dimethylformamide suspension at a concentration of 10mg / L, and the mass of GO accounted for MIL in the composite material. 50% of the mass of -53(Fe), after sonication, add 25ml of N,N-dimethylformamide solution containing 100mM terephthalic acid dropwise to the above mixture and then sonicate for 2h, then add 0.6mmol of FeCl 3 ·6H 2 O and 250 μl of ethylenediamine were dissolved in 5 ml of N,N-dimethylformamide at a material ratio of 3:1, and finally, the mixed solution was added dropwise to the previous mixture, and sonicated to a homogeneous mixture. The resulting mixture was transferred to a polytetrafluoroethylene-lined autoclave and kept at 150 °C for 15 h. After cooling to room temperature, it was centrifuged at 8000 r / min for 5 min and washed three times with N-dimethylformamide and methanol. , dried in vacuum at 80°C for 1...

Embodiment 3

[0034] Will contain 2.5mmol FeCl 3 ·6H 2 25ml of N,N-dimethylformamide solution of O was added dropwise to 16ml of graphene oxide-containing N,N-dimethylformamide suspension at a concentration of 10mg / L, and the mass of GO accounted for MIL in the composite material. 50% of the mass of -53(Fe), after sonication, add 25ml of N,N-dimethylformamide solution containing 100mM terephthalic acid dropwise to the above mixture and then sonicate for 2h, then add 0.6mmol of FeCl 3 ·6H 2 O and 250 μl of ethylenediamine were dissolved in 5 ml of N,N-dimethylformamide at a material ratio of 3:1, and finally, the mixed solution was added dropwise to the previous mixture, and sonicated to a homogeneous mixture. The resulting mixture was transferred to a polytetrafluoroethylene-lined autoclave and kept at 150 °C for 15 h. After cooling to room temperature, it was centrifuged at 8000 r / min for 5 min and washed three times with N-dimethylformamide and methanol. , dried in vacuum at 80°C for 1...

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Abstract

The invention discloses design and preparation of an MIL-53(Fe) based catalyst and application of the catalyst in removal of antibiotics in water. The catalyst is synthesized through an in-situ pyrolysis method and a hydrothermal method. The efficient degradation of antibiotics is realized. The method is characterized by comprising the following steps: magnetic gamma-Fe2O3 ultrafine particles areuniformly distributed in an MIL-53(Fe) regular octahedron pore structure to form a micro heterojunction; then, layered graphene oxide (GO) with high conductivity enables MIL-53(Fe) with high crystallinity to be dispersed on the surface of the layered graphene oxide (GO), and finally, the gamma-Fe2O3-MIL-53(Fe)-GO composite photocatalyst is synthesized. The catalyst is applied to degradation of antibiotics in water under a certain condition; compared with other composite catalysts taking MIL-53(Fe) as a main body, the composite catalyst gamma-Fe2O3-MIL-53(Fe)-GO has the advantages of high degradation efficiency on antibiotics in water, large photo-response range, low cost, short degradation period and high material reusability in the process of degrading antibiotic wastewater. Therefore, the composite material prepared by the method can be widely applied to removal of antibiotics in water, and has a high application value and industrial prospect.

Description

technical field [0001] The invention relates to the field of metal-organic framework materials, in particular to a novel MIL-53(Fe)-based photocatalyst γFe 2 o 3 - Application of MIL-53(Fe)-GO in photocatalytic degradation of antibiotics in water. Background technique [0002] Norfloxacin, a family of fluoroquinolone antibiotics, has been used in the treatment of various diseases in human and veterinary fields due to its broad antibacterial activity and low side effects. However, due to improper use of drugs and their low biodegradability, more than 75% of antibiotics accumulate in the environment, posing a major threat to the health of aquatic and terrestrial organisms including humans. The content of norfloxacin in sewage from Hong Kong has been reported to reach the milligram per liter level; the values ​​of Queensland-Australia wastewater treatment plant effluent and surface water are 0.25 and 1.15 mg / L, respectively. From the point of view of ecology and environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28C02F1/30C02F101/36C02F101/38C02F101/34
CPCB01J31/28C02F1/30C02F2305/10C02F2101/36C02F2101/38C02F2101/34B01J35/39
Inventor 路莹吴琼景浩川王飞飞金丹楠
Owner NORTHEAST NORMAL UNIVERSITY
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