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Porous inorganic ceramic membrane-graphene-TiO2 photocatalyst composite material and its preparation method

An inorganic ceramic film and composite material technology, applied in the field of photocatalytic materials, can solve the problems of limiting TiO2, affecting catalytic efficiency, low mass transfer rate, etc., to achieve the effect of accelerating surface adsorption reaction, increasing catalytic efficiency, and high mechanical strength

Active Publication Date: 2014-06-25
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. These defects limit the TiO 2 application in practice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A Porous Inorganic Ceramic Membrane-Graphene-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-0.09 mm; then corn starch with a particle size of 0.02 mm is added to the aforementioned cinder with a particle size of 0.06 mm-0.09 mm as a foaming agent, and the amount of corn starch used is 10% of the total mass of the foaming agent and cinder; and then use the semi-dry method to mold the mixture of the aforementioned foaming agent and cinder under the condition of a molding pressure of 38 MPa, and press it into a thin sheet; put the pressed sheet in a muffle furnace Calcining at 1100°C for 2 h to obtain the fly ash-based porous inorganic ceramic sheet; then grinding the fly ash-based porous inorganic ceramic sheet to a particle size of 0.1 mm t...

Embodiment 2

[0031] A Porous Inorganic Ceramic Membrane-Graphene-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-0.09 mm; then corn starch with a particle size of 0.02 mm is added to the aforementioned cinder with a particle size of 0.06 mm-0.09 mm as a foaming agent, and the amount of corn starch used is 10% of the total mass of the foaming agent and cinder; and then use the semi-dry method to mold the mixture of the aforementioned foaming agent and cinder under the condition of a molding pressure of 38 MPa, and press it into a thin sheet; put the pressed sheet in a muffle furnace Calcining at 1100°C for 2 h to obtain the fly ash-based porous inorganic ceramic sheet; then grinding the fly ash-based porous inorganic ceramic sheet to a particle size of 0.1 mm t...

Embodiment 3

[0040] A Porous Inorganic Ceramic Membrane-Graphene-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-0.09 mm; then corn starch with a particle size of 0.02 mm is added to the aforementioned cinder with a particle size of 0.06 mm-0.09 mm as a foaming agent, and the amount of corn starch used is 10% of the total mass of the foaming agent and cinder; and then use the semi-dry method to mold the mixture of the aforementioned foaming agent and cinder under the condition of a molding pressure of 38 MPa, and press it into a thin sheet; put the pressed sheet in a muffle furnace Calcining at 1100°C for 2 h to obtain the fly ash-based porous inorganic ceramic sheet; then grinding the fly ash-based porous inorganic ceramic sheet to a particle size of 0.1 mm t...

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Abstract

The invention discloses a porous inorganic ceramic membrane-graphene-TiO2 photocatalyst composite material and its preparation method, which belongs to the photocatalysis material filed. According to the present invention, coal slag in thermal power plants is taken as a raw material to a prepare the porous inorganic ceramic membrane carrier for raw materials preparation of porous inorganic ceramic membrane carrier, a grapheme and TiO2 complex is loaded on the surface of the carrier to obtain the porous inorganic ceramic membrane-aphene-TiO2 photocatalyst composite. In the composite material, the mass percentage of carrier to the graphene-TiO2 composite is 50% to 80% and 20% to 50%; in graphene-TiO2 composite, the mass percentage of grapheme to TiO2 is3% to 5% and 95% to 97% respectively; a porous structure expressed by the carrier can promote the surface mass transfer process and accelerate the adsorption reaction of the surface, its great specific surface area is capable of increasing the conversion rate of the organic substrate; graphene has a high specific surface area, high mechanical strength and unique electronic transport properties, and can improve material catalytic performance; the active component of the composite material is stable, and the synergistic catalytic properties of multi-components can be possessed.

Description

Technical field: [0001] The invention belongs to the field of photocatalytic materials, in particular to a porous inorganic ceramic membrane-graphene-TiO 2 Photocatalyst composite material and preparation method thereof. Background technique: [0002] Photocatalytic sewage treatment technology, with its unique advantages, has attracted the attention of researchers at home and abroad. Among them, TiO 2 It has become a research hotspot in the field of photocatalytic technology research due to its advantages of good photochemical stability, wear resistance, low price and good ultraviolet photodegradation activity. [0003] However, due to TiO 2 The recombination of photogenerated carriers is fast, resulting in low photon quantum efficiency. At the same time, TiO 2 The energy gap is wide (≈3.2 eV), so that it can only be excited by ultraviolet light, which limits the utilization of solar energy. For this reason, scientific and technological workers have tried a variety of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/04B01J35/10C02F1/30C02F101/30
CPCY02W10/37
Inventor 张俊娇王磊覃吴董长青杨世关杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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