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Method for preparing porous tourmaline slab with photocatalytic performance

A photocatalytic and electrical technology, used in chemical instruments and methods, catalyst carriers, catalysts for physical/chemical processes, etc., can solve the problems of unsuitable flow system, easy deactivation, easy condensation, etc., to improve the efficiency of photocatalytic reaction, Improve oxidation efficiency and release negative ions

Inactive Publication Date: 2012-07-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The photocatalyst currently used on a large scale is TiO 2 However, this system is easy to deactivate, difficult to separate, easy to cause secondary pollution, easy to condense, large air resistance and not suitable for flow systems, etc., which seriously limits the application of photocatalytic technology in wastewater and waste gas treatment. And development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of porous tourmaline slab:

[0027] First, take 12% tourmaline powder, 20% quartz powder, 15% feldspar powder, 43% kaolin powder and 10% glass powder by mass percentage to obtain a mixture, and then mix 30% sawdust or coconut shell powder is added to the material as a pore-forming agent and 7% water is mixed evenly, then put into a press for dry pressing, and after drying, it is sintered at 650°C to prepare a porous tourmaline plate;

[0028] Among them, the particle size of the powder is less than 150 mesh, and the particle size of the pore-forming agent is 70-150 mesh;

[0029] 2) Nano-TiO 2 Sol preparation:

[0030] 12% butyl titanate Ti(OC 4 h 9 ) 4 1. After mixing 6% diethanolamine, add 82% absolute ethanol under strong mechanical stirring to prepare solution A;

[0031] Mix 91% absolute ethanol and 9% distilled water by volume percentage to prepare solution B;

[0032] Add solution B dropwise to solution A while stirring, and continue stirrin...

Embodiment 2

[0035] 1) Preparation of porous tourmaline slab:

[0036] First, take 12% of tourmaline powder, 15% of quartz powder, 10% of feldspar powder, 55% of kaolin powder and 8% of glass powder by mass percentage to obtain a mixture, and then Add sawdust or coconut shell powder with 50% of the mass of the mixture as a pore-forming agent and 9% of water, and then put it into a press for dry pressing to form, and after drying, sinter at 750°C to prepare a porous tourmaline plate;

[0037] Among them, the particle size of the powder is less than 150 mesh, and the particle size of the pore-forming agent is 70-150 mesh;

[0038] 2) Nano-TiO 2 Sol preparation:

[0039] 28% butyl titanate Ti(OC 4 h 9 ) 4 1. After mixing 4% diethanolamine, add 68% absolute ethanol under strong mechanical stirring to prepare solution A;

[0040] Mix 91% absolute ethanol and 9% distilled water by volume percentage to prepare solution B;

[0041] Add solution B dropwise to solution A while stirring, and con...

Embodiment 3

[0044] 1) Preparation of porous tourmaline slab:

[0045] First, take 12% tourmaline powder, 30% quartz powder, 10% feldspar powder, 40% kaolin powder and 8% glass powder by mass percentage to get a mixture, and then Add sawdust or coconut shell powder with 15% of the mass of the mixture as a pore-forming agent and 8% of water to the material, mix them evenly, put them into a press for dry pressing, and then sinter at 680°C after drying to prepare porous tourmaline slabs;

[0046] Among them, the particle size of the powder is less than 150 mesh, and the particle size of the pore-forming agent is 70-150 mesh;

[0047] 2) Nano-TiO 2 Sol preparation:

[0048] 20% butyl titanate Ti(OC 4 h 9 ) 4 After mixing 5% diethanolamine, add 75% absolute ethanol under strong mechanical stirring to prepare solution A;

[0049] Mix 91% absolute ethanol and 9% distilled water by volume percentage to prepare solution B;

[0050] Add solution B dropwise to solution A while stirring, and co...

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Abstract

The invention discloses a method for preparing a porous tourmaline slab with photocatalytic performance. Tourmaline, quartz, feldspar, kaolin and glass powder are used as raw materials; and sawdust or coconut shells is / are used as a pore forming agent. The method comprises the following steps of: performing dry pressing, drying, sintering at the temperature of between 650 and 750 DEG C to form a porous tourmaline base slab, coating nano TiO2 sol prepared by titanium alkoxide hydrolysis on the porous tourmaline base slab by adopting a vacuum impregnation method, roasting, and thus obtaining the nano TiO2 supported porous tourmaline slab. The method solves the problems that nano TiO2 powder is fine and difficult to separate and reclaim and the like; and the porous tourmaline slab has high specific surface area, efficient photocatalytic property and negative ion release property. The photocatalytic property is tested by adopting degradable methyl orange, namely the nano TiO2 supported porous tourmaline slab and nano TiO2 microspheres are respectively put into 50 milliliters of 10mg / L methyl orange solution, irradiated for 4 hours by using an ultraviolet lamp and then separated, and the absorbance of the porous tourmaline slab and the nano TiO2 microspheres is tested. By calculating the degradation rate of the methyl orange, the nano TiO2 supported porous tourmaline slab has high degradation property on the methyl orange, and the degradation property is nearly improved by 40 percent compared with the nano TiO2 microspheres.

Description

technical field [0001] The invention relates to a preparation method of a porous tourmaline board, in particular to a preparation method of a porous tourmaline board with photocatalytic performance. Background technique [0002] With the continuous improvement of living standards, people have higher and higher requirements for the comfort and sanitation of the living environment. However, with the development of social industrialization, environmental pollution has gradually increased. Mainly manifested in two aspects of outdoor and indoor. Outdoors are mainly the pollution of water resources, air resources and soil resources caused by industrial enterprises such as power plants, chemical plants, paper mills, and automobile exhaust. Indoor is mainly room decoration, furniture and local small environmental pollution caused by high-density urban population. In order to solve this problem, it is very important to research and develop materials with high photocatalysis and nega...

Claims

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Application Information

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IPC IPC(8): B01J27/138B01J32/00C02F1/32C02F1/72
Inventor 黄凤萍樊英鸽王保和孙晶晶杨军胜
Owner SHAANXI UNIV OF SCI & TECH
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