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A high-strength, light-weight, porous and environmentally friendly interior wall diatom brick with visible light catalytic performance and its preparation method

A catalytic performance, diatom brick technology, applied in ceramic products, clay products, household appliances, etc., can solve the problems of low photodegradation ability, inability to effectively use visible light, etc., achieve stable catalytic performance, improve indoor living environment, heat insulation Good thermal insulation effect

Inactive Publication Date: 2019-04-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the forbidden band width of titanium dioxide is about 3.2eV, and it mainly responds in the ultraviolet light region with a wavelength less than 400nm, while ultraviolet light accounts for less than 5% of sunlight, and the content in indoor lighting light is even lower, so Titanium dioxide photocatalysts cannot effectively utilize visible light in sunlight and indoor lights, resulting in low actual photodegradation ability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The invention provides a high-strength, lightweight, porous and environmentally friendly diatom brick for interior walls with visible light catalytic performance and a preparation method thereof. By adding chrysotile fibers, it is randomly filled in the brick structure, so that the strength of the diatom brick is improved. Increase; By using bismuth tungstate visible light catalyst instead of titanium dioxide, the visible light catalytic performance of diatomite brick is better, and the degradation effect is better.

[0025] A high-strength, lightweight, porous and environmentally friendly diatom brick for interior walls with visible light catalytic performance. The wall shell of the diatom brick has a large number of voids, and the voids are distributed in multiple levels, with pore sizes ranging from nanometers to micrometers. The diatom brick components and their percentages in the total mass of raw materials are 60-85% of diatomite, 5-15% of kaolin, 2-15% of serpenti...

Embodiment 1

[0026] Example 1: Preparation of high-strength, lightweight, porous and environmentally friendly diatom bricks for interior walls with visible light catalytic performance

[0027] Diatomite, kaolin, chrysotile fiber, polymer binder (hydroxypropyl methylcellulose is selected as the polymer binder in this embodiment), feldspar (potassium feldspar is selected in this embodiment) Mix according to a certain mass ratio, wherein the serpentine fiber accounts for 2% of the total amount, stir evenly, and mix evenly to prepare the raw material of diatomite-based green body; place the raw material of diatomite-based green body in a hydraulic press, Press the green body under pressure; place the pressed green body in a drying oven for drying; place the dried green body in a high-temperature furnace and roast it at 800°C for 1 hour, then turn off the furnace and let it cool naturally to room temperature. According to 1mmol of Bi(NO) 3 And the ratio of 10ml acetic acid, stir to form bismu...

Embodiment 2

[0028] Example 2: Preparation of high-strength, lightweight, porous and environmentally friendly interior wall diatom bricks with visible light catalytic performance

[0029] Mix diatomite, kaolin, chrysotile fiber, polymer binder, and feldspar according to a certain mass ratio, wherein chrysotile fiber accounts for 4% of the total amount, stir evenly, stir and mix evenly, and prepare diatom Earth-based green body raw material; put the diatomite-based green body raw material in a hydraulic press, and press it into a green body under a certain pressure; put the pressed green body into a drying box for drying; put the dried green body in a In a high-temperature furnace, bake at 950° C. for 2 hours, then close the furnace, and cool to room temperature naturally. According to 1mmol of Bi(NO) 3 And the ratio of 10ml acetic acid, stir to form bismuth nitrate solution; Press 0.5mmol Na 2 WO 4 Mix with 10ml of water, stir to form sodium tungstate solution; add sodium tungstate solu...

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Abstract

The invention relates to a high-strength, lightweight, environment-friendly and porous interior wall diatomite brick with visible light photocatalysis performance and a preparation method of the interior wall diatomite brick. Diatomite, kaoline, chrysotile fibers, a macromolecule adhesive and feldspar are mixed and pressed to form a green body, the green body is dried, calcined and cooled, a diatomite brick is obtained, coated with bismuth tungstate, then calcined and cooled, and the interior wall diatomite brick is obtained. According to the interior wall diatomite brick, the excellent special performance of the diatomite serving as a main base material is utilized, the chrysotile fibers and a bismuth tungstate photocatalyst are added, the mechanical property of the interior wall diatomite brick is improved, and the photocatalysis effect under visible light is realized. Besides, a novel environment-friendly building material capable of decomposing toxic and harmful gas in a room and integrating functions of humidity conditioning, thermal insulation, antibacterium, sound absorption, heat preservation, air purification, flame retardance and the like can be further produced.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic mineral materials, in particular to a high-strength, lightweight, porous and environment-friendly diatom brick for interior walls with visible light catalytic performance and a preparation method thereof. Background technique [0002] In recent years, with the continuous improvement of people's living standards, various indoor home decoration materials have been used in large quantities, and the resulting indoor air pollution has become increasingly obvious. Organic pollution such as formaldehyde, benzene, and xylene has become commonplace, and the physical injuries caused by this are also frequent. have happened. Therefore, it has become an important goal to eliminate indoor pollution as much as possible and create a green and safe indoor environment. In order to meet people's needs, environmental protection building materials came into being. [0003] Indoor wall tiles prepared ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B33/36C04B33/13C04B41/85
CPCC04B33/1305C04B33/131C04B33/36C04B38/00C04B41/009C04B41/5007C04B41/85C04B2235/3418C04B2235/3463C04B2235/5232C04B2235/74C04B2235/77C04B2235/9646C04B41/4539C04B41/0072
Inventor 刘琨刘欢唐学昆冯其明
Owner CENT SOUTH UNIV
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