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Preparation method of high-intensity photocatalytic cement-based composite slurry and product thereof

A composite slurry, high-intensity light technology, applied in the field of photocatalytic cement-based composite slurry, can solve problems such as practical application limitations, no product reports, inability to absorb visible light, etc., to increase bulk density, improve product strength, The effect of improving light absorption efficiency

Active Publication Date: 2014-06-04
JIANGSU GAOCHUN CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to TiO 2 Semiconductors can only absorb ultraviolet light with a wavelength of less than 387nm to play a catalytic role and cannot absorb visible light (wavelength greater than 400nm), which greatly limits the practical application of this technology
[0005] However, there are no reports on the photocatalytic cement-based composite materials and their products that have both high strength and visible light triggering.

Method used

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  • Preparation method of high-intensity photocatalytic cement-based composite slurry and product thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] (1) Preparation of rare earth element Nd and N co-doped TiO 2 : Add tetrabutyl titanate dropwise into a mixed solution of absolute ethanol and glacial acetic acid (the pH of the mixed solution is 2), and stir to obtain liquid A. Among them, tetrabutyl titanate: absolute ethanol: glacial acetic acid = 14.5: 60.1: 3.2 (mass ratio); urea, Nd(NO 3 ) 3 ·6H 2 O was dissolved in absolute ethanol and deionized water to obtain liquid B, in which urea: Nd(NO 3 ) 3 ·6H 2 O: absolute ethanol: deionized water = 0.5: 0.5: 19.2: 2.8 (mass ratio); Slowly add liquid A to liquid B, stirring continuously to obtain rare earth element Nd and N co-doped TiO 2 Sol: put the sol still, and after it forms a gel, put it in a temperature-programmed furnace to raise the temperature to 550°C at a rate of 3°C / min, then keep it warm for 3h, and grind to obtain rare earth element Nd and N co-doped TiO 2 , take the powder below 200 mesh and use Fe ion bombardment implantation, set the accelerating...

Embodiment 2

[0068] (1) Preparation of rare earth element Nd and N co-doped TiO 2 : Add tetrabutyl titanate dropwise into a mixed solution of absolute ethanol and glacial acetic acid (the pH of the mixed solution is 2), and stir to obtain liquid A. Among them, tetrabutyl titanate: absolute ethanol: glacial acetic acid = 20:64:5 (mass ratio); urea, Nd(NO 3 ) 3 ·6H 2 O was dissolved in absolute ethanol and deionized water to obtain liquid B, in which urea: Nd(NO 3 ) 3 ·6H 2 O: absolute ethanol: deionized water = 0.3:0.7:27:1 (mass ratio); slowly add solution A to solution B, and keep stirring to obtain rare earth element Nd and N co-doped TiO 2 Sol: put the sol to stand, and after it forms a gel, place it in a temperature-programmed furnace to raise the temperature to 700°C at a rate of 3°C / min, then keep it warm for 3 hours, and grind it to obtain rare earth element Nd and N co-doped TiO 2 , take the powder below 200 mesh and use Fe ion bombardment implantation, set the accelerating v...

Embodiment 3

[0079] (1) Preparation of rare earth element Nd and N co-doped TiO 2 : Add tetrabutyl titanate dropwise into a mixed solution of absolute ethanol and glacial acetic acid (the pH of the mixed solution is 2), and stir to obtain liquid A. Wherein tetrabutyl titanate: absolute ethanol: glacial acetic acid = 20:52:6 (mass ratio); Guanidine hydrochloride, Gd(NO 3 ) 3 ·6H 2 O is dissolved in absolute ethanol and deionized water to obtain liquid B, wherein guanidine hydrochloride: Gd(NO 3 ) 3 ·6H 2 O: absolute ethanol: deionized water = 0.8:0.1:25:4 (mass ratio); Slowly add solution A to solution B, and keep stirring to obtain rare earth element Nd and N co-doped TiO 2 Sol: put the sol to stand still, after it forms a gel, place it in a temperature-programmed furnace to raise the temperature to 400°C at a rate of 3°C / min, then keep it warm for 5h, and grind to obtain rare earth element Nd and N co-doped TiO 2 , take the powder below 200 mesh and use Fe ion bombardment implantati...

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Abstract

The invention relates to high-intensity photocatalytic cement-based composite slurry. The high-intensity photocatalyst cement-based composite slurry comprises a photocatalyst composite body, cement, aggregate, an active mixture, a polymer additive, fibers, a water reducing agent and water, wherein the photocatalyst composite body comprises modified rare-earth elements and N co-doped TiO2, activated carbon and conductive fillers. According to the preparation method, the slurry is prepared through the raw materials and then treated by pouring and maintaining and molding with high humidity under a high temperature and other processes to form a face brick and an exterior wall cladding. The product detection result shows that the ultimate bending strength of the product reaches 25 to 30MPa, the ultimate compressive strength reaches 150 to 200MPa, the shock strength reaches 15 to 20kJ / m<2>, an absorption band of a photocatalyst is subjected to redshift to reach a 600nm visible region, the degradation rate for a 1mg / L rhodamine aqueous solution after 6 hours reaches 85 to 90%, and therefore, the product is high in mechanical strength and high in capacity of degrading pollutants with the visible light in a photocatalytic manner.

Description

technical field [0001] The invention relates to the field of photocatalytic cement-based composite slurry, in particular to a high-strength, visible light-induced photocatalytic cement-based composite slurry and a preparation method for its products. Background technique [0002] At present, ordinary medium-strength cement-based materials are mostly used in the construction field, and the realization of high-strength cement-based materials has important economic and social benefits. In addition, with the increasing environmental pollution, environmental protection is also an important issue facing the building materials industry. By improving cement-based materials to have a photocatalytic function, developing cement that can decompose pollutants in the environment under visible light and has self-cleaning effects Substrates have attracted widespread interest. [0003] There have been many reports and patents on high-strength cement-based materials, including adding functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 孔德双刘志斌谷昌军孔令仁许升
Owner JIANGSU GAOCHUN CERAMICS
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