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A kind of carbon-coated metal nanoparticle-loaded PVDF film and its preparation method and application

A metal nanoparticle, carbon coating technology, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, etc. Cumbersome, high cost of film-making process, to achieve the effect of high degradation rate, easy industrial application, avoid secondary pollution

Active Publication Date: 2019-06-14
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a method for preparing a carbon-coated metal nanoparticle-loaded PVDF film and a method for degrading organic pollutants. The problems to be solved are cumbersome steps in the film-making process, harsh experimental conditions, high cost of the film-making process, and high energy consumption. High, technical problems such as metal nanoparticles are easy to agglomerate, lose, and cannot be mass-produced

Method used

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  • A kind of carbon-coated metal nanoparticle-loaded PVDF film and its preparation method and application
  • A kind of carbon-coated metal nanoparticle-loaded PVDF film and its preparation method and application
  • A kind of carbon-coated metal nanoparticle-loaded PVDF film and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0032] This embodiment first prepares carbon-coated iron nanoparticles loaded PVDF membrane catalyst according to the following steps:

[0033](1) Weigh 2g (10.06mmol) ferrous chloride tetrahydrate (FeCl 2 4H 2 O), 5g (59.47mmol) dicyandiamide (C 2 h 4 N 4 ) and 2g (12.66mmol) sodium thiosulfate (Na 2 S 2 o 3 ) in 200mL methanol solution at 50°C and stirred evenly, then evaporated, dried, and ground to obtain a homogeneous powder; place the homogeneous powder in a quartz tube, and place the quartz tube in the uniform temperature zone of a tubular resistance furnace, In a high-purity nitrogen atmosphere with a flow rate of 0.2mL / min, the temperature was raised to 700°C at a rate of 10°C / min, and calcined at a constant temperature for 2 hours; after the reaction was completed, the quartz tube was cooled to room temperature in a high-purity nitrogen atmosphere to obtain Pyrolysis product carbon-coated iron nanoparticles;

[0034] (2) Weigh 50 mg of the pyrolysis product c...

Embodiment 2

[0041] In this embodiment, the same carbon-coated iron nanoparticle-loaded PVDF membrane catalyst as in Example 1 is used to construct the same catalytic membrane reactor device to process the following organic pollutant solution: prepare 20 mg / L methylene blue solution to simulate organic pollutant wastewater (V=250mL), and at the same time, 150mg of oxidant permonomonosulfate (PMS) was added.

[0042] After testing, the degradation rate of organic pollutants reaches 100%.

Embodiment 3

[0044] In this embodiment, the same carbon-coated iron nanoparticle-loaded PVDF membrane catalyst as in Example 1 is used to construct the same catalytic membrane reactor device to process the following organic pollutant solution: prepare 20 mg / L rhodamine B solution to simulate organic pollutant wastewater (V=250mL), and at the same time, 150mg of oxidant permonomonosulfate (PMS) was added.

[0045] After testing, the degradation rate of organic pollutants reaches 100%.

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Abstract

The invention discloses a carbon-coated metal nanoparticle-loaded PVDF film and its preparation method and application. The carbon-coated metal nanoparticles are first synthesized, and then mixed with polyvinylidene fluoride powder, organic additives and dispersion media. Stir to obtain a casting liquid, and then obtain the target product through the solution phase transformation method. The carbon-coated metal nanoparticle-loaded PVDF membrane of the present invention can efficiently mineralize toxic organic pollutants in water bodies with a high degradation rate; a catalytic membrane reactor is constructed to carry out catalytic degradation of organic pollutants, based on the micro-nano separation effect of the membrane pore structure , blocks the penetration of macromolecular organic pollutants, plays a interception role, improves the conversion rate and selectivity of degradation, solves the technical problem of easy agglomeration and loss of metal nanoparticles, and avoids potential secondary pollution to water bodies; and is prepared The method has the advantages of lower cost, simple process, controllable structure, strong operability, and easy industrial application.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic catalysts, in particular to a PVDF film supported by carbon-coated metal nanoparticles and a method for degrading organic pollutants. Background technique [0002] Most of the wastewater discharged by the chemical industry is complex, poorly biodegradable, and difficult to biodegrade, which has brought great harm to the ecological environment and human health. Advanced oxidation technology has become a research hotspot in the field of sewage treatment because it can efficiently mineralize toxic organic pollutants in water. In various advanced oxidation technologies, the Fenton-like catalytic mechanism of activating strong oxidants to generate highly active free radicals through metal nanoparticles M (M: Fe, Cu, Co, Mn, Zn, Ni, etc.) The advantages of mild conditions, low energy consumption, no need for external heat sources and light sources, and non-toxic effects on subsequent b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L39/06C08K9/00C08K3/04C08K3/08C08J5/18B01J31/06B01J23/745B01J37/08C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCC02F1/722C02F1/725C08J5/18C08L27/16B01J23/745B01J31/06B01J37/0009C02F2101/38C02F2101/40C02F2101/34C02F2101/36C02F2101/30C02F2305/023C08J2439/06C08L2203/16C08K2003/0856C08K2003/0843C08K2003/0862C08K2201/011C08J2327/16B01J35/59C08L39/06C08K9/00C08K3/04C08K3/08
Inventor 姚运金连超胡熠张婕高梦雪张宇
Owner HEFEI UNIV OF TECH
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