Carbon-coated metal nanoparticle-loaded PVDF (Polyvinylidene Fluoride) membrane as well as preparation method and application thereof

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

Active Publication Date: 2017-09-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Carbon-coated metal nanoparticle-loaded PVDF (Polyvinylidene Fluoride) membrane as well as preparation method and application thereof
  • Carbon-coated metal nanoparticle-loaded PVDF (Polyvinylidene Fluoride) membrane as well as preparation method and application thereof
  • Carbon-coated metal nanoparticle-loaded PVDF (Polyvinylidene Fluoride) membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
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 and metal nanoparticle-loaded PVDF (Polyvinylidene Fluoride) membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, synthesizing carbon-coated metal nanoparticles; secondly, mixing the carbon-coated metal nanoparticles with polyvinylidene fluoride powder, an organic additive and a dispersion medium and stirring to obtain a casting membrane solution; thirdly, obtaining a target product by a solution phase conversion method. The carbon-coated and metal nanoparticle-loaded PVDF membrane disclosed by the invention disclosed by the invention can efficiently mineralize toxic organic pollutants in a water body and is high in degradation rate; a catalytic membrane reactor is constructed to carry out a catalytic degradation reaction of the organic pollutants; macromolecular organic pollutants are prevented from passing through on the basis of a micronano separation effect of a membrane pore structure, so an interception effect is realized, conversion rate and selectivity of degradation are improved, the technical problems that metal nanoparticles are easy to agglomerate and lose are solved, and potential secondary pollution to the water body is avoided; in addition, the preparation method has the advantages of lower cost, simple process, controllable structure, high maneuverability, easiness for industrial application and the like.

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 Applications(China)
IPC IPC(8): C08L27/16C08L39/06C08K9/00C08K3/04C08K3/08C08J5/18B01J31/06B01J23/745B01J37/08C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J23/745B01J31/06B01J35/065B01J37/0009C02F1/722C02F1/725C02F2101/30C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2305/023C08J5/18C08J2327/16C08J2439/06C08K2003/0843C08K2003/0856C08K2003/0862C08K2201/011C08L27/16C08L2203/16C08L39/06C08K9/00C08K3/04C08K3/08
Inventor 姚运金连超胡熠张婕高梦雪张宇
Owner HEFEI UNIV OF TECH
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