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Carbon nano tube/porous ceramic hollow fiber composite ultrafiltration membrane as well as preparation method and application thereof

A technology of porous ceramics and carbon nanotubes, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the increase of gas and liquid mass transfer resistance in the pores of composite membranes, limiting the growth of carbon nanotubes, and the influence of structure and morphology, etc. To achieve the effect of large-area growth, strong tunable denaturation, and enhanced separation performance

Inactive Publication Date: 2016-04-06
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the carbon film layer prepared by vapor deposition method based on the ceramic substrate can ensure sufficient mechanical properties, the structure and morphology of the ceramic carrier also has an impact on the carbon film. The traditional symmetrical ceramic film structure is a symmetrical structure composed of particle accumulation. On the one hand, Due to particle and molding limitations, the pore size will limit the growth of carbon nanotubes. On the other hand, it will also increase the overall pore, gas and liquid mass transfer resistance of the composite membrane, and attenuate the permeability performance.

Method used

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  • Carbon nano tube/porous ceramic hollow fiber composite ultrafiltration membrane as well as preparation method and application thereof
  • Carbon nano tube/porous ceramic hollow fiber composite ultrafiltration membrane as well as preparation method and application thereof
  • Carbon nano tube/porous ceramic hollow fiber composite ultrafiltration membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Preparation of carbon nanotube / porous ceramic hollow fiber composite ultrafiltration membrane

[0035] The mullite hollow fiber ceramic membrane with an average pore size of 1.0 μm is used as a carrier to prepare a carbon nanotube / porous ceramic hollow fiber composite ultrafiltration membrane with a pore size of <100 nm. The steps are:

[0036] The first step, the pretreatment of the carrier

[0037] A mullite hollow fiber ceramic membrane with a pore size of 1.0 μm (see figure 1 The picture on the left) was ultrasonically oscillated with absolute ethanol for 1 hour, then washed with deionized water until neutral, and dried at 100°C for 2 hours to obtain the treated carrier;

[0038] In the second step, the Ni(NO 3 ) 2 Prepare a solution with a mass concentration of 20%, and use dip-coating (dipping coating) method to coat Ni(NO 3 ) 2 The solution was coated on the treated carrier, dried at 80°C for 1 hour, and then baked in a muffle furnace at 400°C for...

Embodiment 2

[0045] Example 2: Preparation of carbon nanotube / porous ceramic hollow fiber composite ultrafiltration membrane

[0046] Al with an average pore size of 1.0 μm 2 o 3 The hollow fiber ceramic membrane is used as a carrier to prepare a carbon nanotube / porous ceramic hollow fiber composite ultrafiltration membrane with a pore size of <100nm. The steps are:

[0047] The first step, the pretreatment of the carrier

[0048] Al as a carrier with a pore size of 1.0 μm 2 o 3 The hollow fiber ceramic membrane was ultrasonically oscillated with absolute ethanol for 1 hour, then washed with deionized water until neutral, and dried at 100°C for 2 hours to obtain the treated carrier;

[0049] In the second step, the Ni(NO 3 ) 2 Prepare a solution with a mass concentration of 10%, and use dip-coating (dipping coating) to coat Ni(NO 3 ) 2 The solution was coated on the treated carrier, dried at 80°C for 1 hour, and then baked in a muffle furnace at 350°C for 2 hours. Through x-ray di...

Embodiment 3

[0053] Example 3: Preparation of carbon nanotube / porous ceramic hollow fiber composite ultrafiltration membrane

[0054] ZrO with an average pore size of 1.0 μm 2 The hollow fiber ceramic membrane is used as a carrier to prepare a carbon nanotube / porous ceramic hollow fiber composite ultrafiltration membrane with a pore size of <100nm. The steps are:

[0055] The first step, the pretreatment of the carrier

[0056] ZrO with a pore size of 1.0 μm was used as the carrier 2 The hollow fiber ceramic membrane was ultrasonically oscillated with absolute ethanol for 1 hour, then washed with deionized water until neutral, and dried at 100°C for 2 hours to obtain the treated carrier;

[0057] In the second step, the Ni(NO 3 ) 2 Prepare a solution with a mass concentration of 30%, and use dip-coating (dipping coating) method to coat Ni(NO 3 ) 2 The solution is coated on the treated carrier, dried at 80° C. for 1 hour, and then baked in a muffle furnace at 300-400° C. for 2 hours. ...

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Abstract

The invention discloses a carbon nano tube / porous ceramic hollow fiber composite ultrafiltration membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ultrasonic vibration on a hollow fiber ceramic membrane used as a carrier with absolute ethyl alcohol and washing the hollow fiber ceramic membrane with de-ionized water until the hollow fiber ceramic membrane is neutral; drying to obtain the treated carrier; coating a Ni(NO3)2 solution onto the treated carrier by using an impregnation coating method; after drying, putting the carrier into a muffle furnace to be roasted to obtain a hollow fiber membrane loaded with a nickel oxide catalyst; putting the hollow fiber membrane into a quartz reaction tube and introducing N2 and H2 into the quartz reaction tube to reduce a catalyst; and switching into hydrogen gas and raising the temperature, switching a gas flow into pure methane gas and carrying out a high-temperature reaction to obtain the product. The carbon nano tube / porous ceramic hollow fiber composite ultrafiltration membrane can be used for separating liquid-water emulsion liquid and bacteria, and has a very good effect of removing PM1 fine particles in atmosphere.

Description

technical field [0001] The invention relates to the field of inorganic membranes, in particular to a carbon nanotube / porous ceramic hollow fiber composite ultrafiltration membrane, a preparation method and an application. Background technique [0002] Environmental issues have always been the focus of attention of all countries in the world. Water pollution and air pollution are always threatening the living environment of human beings. Water pollution: Oil spills and oily industrial wastewater discharges are already a worldwide problem, which brings many toxic substances to the ocean, which are passed from lower plants and algae to higher mammals, including humans, through the marine food chain, making organisms Species and human health are threatened. Today, there are more and more low-quality waters with high content of organic matter and microorganisms in the world, and the demand for rational use of water resources and conversion into clean drinking water is increasing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/08B01D69/12B01D67/00B01D17/022B01D46/54
CPCB01D71/021B01D17/085B01D46/543B01D67/0072B01D69/08B01D69/12
Inventor 董应超朱丽马丽宁
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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