Preparation method of high-strength photocatalytic cement-based composite slurry and products thereof

A technology of high-intensity light and composite slurry, which is applied in the field of preparation of high-strength, visible light-induced photocatalytic cement-based composite slurry and its products, can solve problems such as inability to absorb visible light, practical application limitations, and unreported products. Achieve the effects of improving light absorption efficiency, increasing bulk density, and improving product strength

Active Publication Date: 2016-01-06
JIANGSU GAOCHUN CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-strength photocatalytic cement-based composite slurry and products thereof
  • Preparation method of high-strength photocatalytic cement-based composite slurry and products thereof

Examples

Experimental program
Comparison scheme
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. Wherein 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, and stir 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 volta...

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. Wherein 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 liquid A to liquid 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 voltage ...

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 liquid A to liquid 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 implantation,...

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Abstract

The invention relates to a high-strength photocatalytic cement-based composite slurry, including photocatalyst complex, cement, aggregate, active mixture, polymer additives, fibers, water reducer and water; It is composed of rare earth elements and N co-doped TiO2, activated carbon and conductive filler. The raw material is made into a slurry, and then the slurry is poured, high-temperature and high-humidity curing molding and other processes to produce facing bricks and external wall hanging panels. The test results of the product show that the ultimate bending strength is 25-30MPa, the ultimate compressive strength is 150-200MPa, the impact strength is 15-20kJ / m2, and the absorption band of the photocatalyst is red-shifted to the visible light region of 600nm. The degradation rate of the rhodamine aqueous solution of L reaches 85-90% after being illuminated for 6 hours, indicating that the product has high mechanical strength and the ability to photocatalytically decompose pollutants by using visible light.

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 Patents(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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