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Preparation method for fiber reinforced porous carbon based electrocatalytic filtering material

A porous carbon and electrofiltration technology, applied in catalyst activation/preparation, chemical instruments and methods, separation methods, etc., can solve the problems of insufficient metal oxide layer binding force, low mechanical strength performance, etc., and achieve enhanced binding force and electronic The effect of transmission capacity, not easy to passivation and deactivation, and stable performance

Inactive Publication Date: 2019-11-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing porous carbon materials have the defects of low mechanical strength and insufficient bonding force with the metal oxide layer (CN103272490A, CN101857288A)

Method used

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  • Preparation method for fiber reinforced porous carbon based electrocatalytic filtering material
  • Preparation method for fiber reinforced porous carbon based electrocatalytic filtering material

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preparation example Construction

[0018] A method for preparing a porous carbon-based electric filter material with a high-strength fiber substrate, comprising the following steps:

[0019] (1) Carbon substrate pretreatment, including the following steps:

[0020] The carbon matrix is ​​carbonized in a tubular muffle furnace under the protection of nitrogen at a high temperature of 300-400 °C for 1-2 hours, and then soaked in a volume ratio of 1:1:10-1:1:20 with a mass percentage of 37 % concentrated hydrochloric acid, 30% mass percent hydrogen peroxide, and deionized water for 10-25 minutes, then alternately wash the carbon matrix with deionized water and absolute ethanol until it is neutral, and place it in an oven at 90 Dry at ~105°C to remove moisture from the substrate. The purpose of pretreatment is to modify the surface of the substrate with inorganic acid to reduce the stress between the substrate surface and the metal interface.

[0021] (2) Select high-strength fiber material (which can be any one ...

Embodiment 1

[0039] (1) Carbon substrate pretreatment, including the following steps:

[0040] The carbon substrate was carbonized in a tubular muffle furnace under the protection of nitrogen at a high temperature of 400 ° C for 1 hour, and then soaked in concentrated hydrochloric acid with a mass percentage of 37% and 30% hydrochloric acid with a volume ratio of 1:1:10. Treat in a mixed solution of hydrogen peroxide and deionized water for 15 minutes, wash the carbon substrate alternately with deionized water and absolute ethanol until neutral, and place it in an oven at 105°C to dry to remove the moisture from the substrate.

[0041] (2) Select ceramic fibers as the substrate support layer, mix the pretreated carbon matrix with the binder and place it in the tablet press mold as the fiber material of the substrate support layer, the binder The amount added accounts for 1wt.% of the mass fraction of the pretreated carbon matrix, the binder is polyvinyl alcohol, the molding pressure is con...

Embodiment 2

[0051] (1) Pretreatment of porous carbon-based materials: Carbonize the carbon substrate at a high temperature of 300°C for 2 hours in a tubular muffle furnace under the protection of nitrogen, and soak the substrate in 37% hydrochloric acid, 30% hydrogen peroxide and Treat in a mixed solution composed of deionized water (volume ratio 1:1:20, respectively) for 25 minutes, alternately wash with deionized water and absolute ethanol until neutral, and place in an oven to dry at a constant temperature of 90°C.

[0052] (2) Select silicon carbide fiber as the substrate support layer, put the porous carbon-based material pretreated in step (1) into the mold of the tablet press for compression molding, add 5wt.% polyvinyl alcohol binder, The forming pressure was controlled at 100 MPa, and the holding time was controlled at 10 min. The carbon substrate was pressed into a flat laminated structure, and placed in a muffle furnace for high temperature carbonization at 400 °C for 1 h.

[0...

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Abstract

The invention discloses a preparation method for a fiber reinforced porous carbon based electrocatalytic filtering material. The preparation method comprises the following preparation flow: pretreatment of a carbon substrate, preparation of a flat-plate-like porous carbon material, loading of a nanometer interlayer onto the flat-plate-like porous carbon material through an impregnation method or an electrochemical deposition method, and preparation of a catalytic active layer on the nanometer interlayer loaded porous carbon material through a sol-gel method or an electrodeposition method. Thefiber reinforced porous carbon based electrocatalytic filtering material prepared by using the preparation method provided by the invention has the following advantage: the service life of a porous carbon based electrocatalytic filtering material can be prolonged.

Description

technical field [0001] The invention relates to the environmental treatment fields such as membrane filter material, filter tower filler and electrocatalytic material used for waste water treatment, disinfection and inactivation of microorganisms in water, organic waste gas treatment, air aerosol treatment, etc., especially relates to fiber-reinforced porous carbon-based electrocatalytic filter material method of preparation. Background technique [0002] At present, for wastewater and waste gas treatment, electrochemical oxidation technology is a very potential treatment method. The electrocatalytic oxidation method can produce a large number of active substances (hydroxyl radicals, hydrogen peroxide, etc.) It has unique advantages such as high efficiency, no need to add chemicals, and simple operation (Environmental Science, 2003, 02:121-124). At present, metal oxide coated electrodes are one of the most widely used electrode materials in the field of electrocatalytic ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20B01J23/18B01J37/02B01J37/10B01J37/03
CPCB01D39/2055B01D53/8687C02F1/725C02F1/4672B01J23/18B01J37/0201B01J37/10B01J37/036C02F2303/04B01D2239/0407B01J35/33
Inventor 王灿陈敏
Owner TIANJIN UNIV
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