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Porous inorganic ceramic membrane-carbon nanotube-TiO2 photocatalyst composite material and preparation method thereof

A technology of inorganic ceramic membrane and carbon nanotubes, which is applied in the field of photocatalytic materials, can solve the problems of low mass transfer rate, low surface concentration, and influence on catalytic efficiency, and achieve the goal of improving material performance, large specific surface area, and increasing catalytic efficiency Effect

Inactive Publication Date: 2014-04-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, pure TiO 2 As a catalyst, the concentration of organic matter in sewage is low on its surface, and the low mass transfer rate also affects its catalytic efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A Porous Inorganic Ceramic Membrane-Carbon Nanotube-TiO 2 Photocatalyst composite material, its preparation method is as follows:

[0023] (1) Preparation of porous inorganic ceramic membrane:

[0024] The main component is SiO 2 、Al 2 o 3 , CaO, MgO, TiO 2 、K 2 O, Na 2 The cinder of O is ground to a particle size of 0.06 mm to 0.09 mm; then, a foaming agent charcoal is added to the cinder with a particle size of 0.06 mm to 0.09 mm, and the amount of charcoal is 10% of the total mass of the foaming agent and cinder, The particle size is 0.02 mm; then the mixture of the aforementioned foaming agent and cinder is molded by semi-dry method under the condition of molding pressure of 38 MPa, and pressed into thin slices; The fly ash-based porous inorganic ceramic sheet was obtained by calcination for 2 h; then the fly ash-based porous inorganic ceramic sheet was ground to a particle size of 0.1 mm to 0.3 mm to obtain a porous inorganic ceramic membrane;

[0025] (2) ...

Embodiment 2

[0031] A Porous Inorganic Ceramic Membrane-Carbon Nanotube-TiO 2 Photocatalyst composite material, its preparation method is as follows:

[0032] (1) Preparation of porous inorganic ceramic membrane:

[0033] The main component is SiO 2 、Al 2 o 3 , CaO, MgO, TiO 2 、K 2 O, Na 2 The cinder of O is ground to a particle size of 0.06 mm to 0.09 mm; then, foaming agent charcoal is added to the cinder with a particle size of 0.06 mm to 0.09 mm, and the amount of charcoal is 10% of the total mass of the foaming agent and cinder, The particle size is 0.02 mm; then, the mixture of the aforementioned foaming agent and cinder is compression-molded under the condition of a molding pressure of 38 MPa by a semi-dry method, and pressed into thin slices; the pressed thin slices are placed in a muffle furnace at 1100 ° C The fly ash-based porous inorganic ceramic sheet was obtained by calcination for 2 h; then the fly ash-based porous inorganic ceramic sheet was ground to a particle size...

Embodiment 3

[0040] A Porous Inorganic Ceramic Membrane-Carbon Nanotube-TiO 2 Photocatalyst composite material, its preparation method is as follows:

[0041] (1) Preparation of porous inorganic ceramic membrane:

[0042] The main component is SiO 2 、Al 2 o 3 , CaO, MgO, TiO 2 、K 2 O, Na 2 The cinder of O is ground to a particle size of 0.06 mm to 0.09 mm; then, foaming agent charcoal is added to the cinder with a particle size of 0.06 mm to 0.09 mm, and the amount of charcoal is 10% of the total mass of the foaming agent and cinder, The particle size is 0.02 mm; then, the mixture of the aforementioned foaming agent and cinder is compression-molded under the condition of a molding pressure of 38 MPa by a semi-dry method, and pressed into thin slices; the pressed thin slices are placed in a muffle furnace at 1100 ° C The fly ash-based porous inorganic ceramic sheet was obtained by calcination for 2 h; then the fly ash-based porous inorganic ceramic sheet was ground to a particle size...

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Abstract

The invention discloses a porous inorganic ceramic membrane-carbon nanotube-TiO2 photocatalyst composite material and a preparation method thereof, and belongs to the field of photocatalytic materials. The porous inorganic ceramic membrane-carbon nanotube-TiO2 photocatalyst composite material is characterized in that a porous inorganic ceramic membrane as a carrier is prepared from coal slag produced by a thermal power plant; a compound of carbon nanotubes and TiO2 is loaded on the surface of the carrier so that the porous inorganic ceramic membrane-carbon nanotube-TiO2 photocatalyst composite material is obtained; the porous inorganic ceramic membrane-carbon nanotube-TiO2 photocatalyst composite material comprises: by mass, 50 to 80% of the carrier and 20 to 50% of the compound of carbon nanotubes and TiO2; and the compound of carbon nanotubes and TiO2 comprises: by mass, 3 to 5% of carbon nanotubes and 95 to 97% of TiO2. The carrier has a well-developed porous structure so that mass transfer on the surface is promoted; a surface adsorption reaction is accelerated; and an organic matter conversion ratio is increased because of a very large specific surface area. Carbon nanotubes have very high specific surface areas, chemical inertness and tunnel conduction characteristics of a delocalized large Pi bond so that material catalytic performances are improved. The porous inorganic ceramic membrane-carbon nanotube-TiO2 photocatalyst composite material has stable active components and multi-component-synergetic catalytic properties.

Description

Technical field: [0001] The invention belongs to the field of photocatalytic materials, in particular to a porous inorganic ceramic membrane-carbon nanotube-TiO 2 Photocatalyst composite material and preparation method thereof. Background technique: [0002] With the rapid development of modern industry and agriculture, a large amount of pollutants are produced, and most of them are discharged into the environment in the form of wastewater, causing serious water pollution and soil pollution, and threatening the sustainable development of human society. Over the years, researchers have used wastewater treatment methods including biological treatment, chemical treatment, heat treatment, etc. to treat wastewater, but these treatment methods are expensive and have certain limitations. Since the 1970s, a new type of sewage treatment technology—photocatalytic sewage treatment technology has emerged. With its unique advantages, this technology is expected to replace conventional e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18C02F1/30
CPCY02W10/37
Inventor 覃吴董长青陈秋銮王孝强杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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