A kind of visible light photocatalytic composite light-transmitting concrete and its preparation method and application

A light-transmitting concrete and visible light technology, applied in the field of concrete, can solve the problems of low purification efficiency of pollutants, low efficiency of solar energy utilization, unclear reaction mechanism, etc., and achieve good light transmission performance, good mechanical performance, decorative and practical functions The effect of increasing the catalytic efficiency

Active Publication Date: 2022-02-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, however, the current photocatalytic materials have problems such as low solar energy utilization efficiency, low pollutant purification efficiency, and unclear reaction mechanism, which restrict the practical application of this technology.

Method used

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  • A kind of visible light photocatalytic composite light-transmitting concrete and its preparation method and application
  • A kind of visible light photocatalytic composite light-transmitting concrete and its preparation method and application
  • A kind of visible light photocatalytic composite light-transmitting concrete and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment 1 provides diatomaceous earth loading g-C 3 N 4 The preparation method of photocatalyst is as follows:

[0070] 1. Diatomite pretreatment: put 1.0g of diatomite into a plastic beaker, add 20ml of 2.0mol / L NaOH aqueous solution and diatomite to mix, and stir under magnetic. After reacting at room temperature for 12 hours, the samples were collected, washed to pH 7.0, dried at 80°C overnight, and ground into diatomite powder;

[0071]2. Diatomaceous earth loading g-C 3 N4 photocatalyst (diatomaceous earth@g-C 3 N 4 )Synthesis:

[0072] First, take 0.01g, 0.02g, 0.04g, 0.10g or 0.20g of diatomite powder in step 1 and disperse them in 30mL of methanol at room temperature for 30min with continuous ultrasound to obtain a well-dispersed diatomite suspension. Add 4.0g melamine to the soil suspension, stir at 25°C for 4 hours, then dry at 70°C for 6 hours, and calcinate the dried mixture in a muffle furnace at 550°C for 4 hours to obtain diatomite-loaded g-...

Embodiment 2

[0075] The optical fiber wrapped with protective layer used in concrete is prepared as follows:

[0076] Use UV glue and the diatomaceous earth load g-C that embodiment 1 prepares 3 The mixture of N4 photocatalysts is coated on the surface of the optical fiber to form a protective layer. The optical fiber (optical fiber) adopts polymethyl methacrylate PMMA plastic optical fiber wire with a diameter of 1mm to 2mm.

[0077] The purpose of optical fiber coating: to protect the surface of the optical fiber fiber from damage, improve its mechanical strength, and reduce attenuation; when it is combined with concrete, it can ensure better light-guiding and energy-transmitting performance, and to a certain extent, it can enhance the light-transmitting concrete Mechanical properties; In addition, a small amount of diatomaceous earth@g-C is added to the UV glue coated with optical fiber 3 N 4 The photocatalyst enables the optical fiber and the photocatalytic material to react quickly...

Embodiment 3

[0099] This embodiment 3 provides a visible light photocatalytic composite light-transmitting concrete. The concrete contains several bundles of optical fibers. The outer surface of the optical fibers is wrapped with a protective layer. The protective layer contains a visible light photocatalyst. The concrete is arranged in an array, the protective layer is a mixture of light-transmitting glue and a visible light photocatalyst, and the concrete contains cement and a visible light photocatalyst dispersed in the cement.

[0100] Raw material: the diatomaceous earth @g-C that embodiment 1 obtains 3 N 4 Photocatalyst, several bundles of optical fiber coated with a protective layer obtained in Example 2, cement, polycarboxylate water reducer, water, fly ash and regenerated coarse aggregate. The best mix ratio in the cement base is: water-cement ratio (referring to the ratio of water consumption per cubic meter of concrete to all cementitious material consumption): 0.35, aggregate ...

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Abstract

The invention belongs to the field of concrete, and in particular relates to a visible light photocatalytic composite light-transmitting concrete, a preparation method and application thereof. The concrete contains several bundles of optical fibers, the outer surface of the optical fibers is wrapped with a protective layer, and the protective layer contains a visible light photocatalyst, and the concrete has several pores through which gas can pass. The present invention proposes a visible light photocatalyst composite light-transmitting concrete for the first time. After mixing the visible light photocatalyst and light-transmitting glue, it is coated on the surface of the optical fiber to form a protective layer, and then the optical fiber is used in concrete, and the obtained concrete has light transmission. and the dual performance of photocatalytic oxidation of gas-phase pollutants under visible light. The invention significantly breaks through the limitation of photocatalytic concrete on the light source, so that the light-transmitting concrete can photocatalyze and remove gas-phase pollutants under visible light, and the optical fiber is coated so that the visible-light photocatalytic composite light-transmitting concrete has better mechanical properties. Performance and decorative and functional utility.

Description

technical field [0001] The invention belongs to the field of concrete, and in particular relates to a visible light photocatalytic composite light-transmitting concrete, a preparation method and application thereof. Background technique [0002] With the rapid development of industry, the problem of air pollution has become increasingly prominent, among which nitrogen oxides (NOx) are one of the key factors in the formation of air pollution, and are important precursors that cause smog and photochemical smog. According to statistics, air pollution causes more than 3 million deaths every year in the world, and has become the most serious environmental pollution problem in the 21st century. To this end, all fields of society have begun to improve technology to achieve energy saving and emission reduction. As an important basic raw material of the national economy, building materials not only save energy and reduce emissions in the production process, but also shoulder the imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B111/80
CPCC04B28/02C04B2201/50C04B2111/00827C04B2111/805C04B18/08C04B18/16C04B14/02C04B14/06C04B22/00C04B14/08C04B16/065C04B2103/0068C03C25/106B01J35/004C04B28/04C04B20/1051C04B18/167C04B24/2647C04B38/00C04B40/0028B01J23/18B01J31/34B01J2531/54C04B18/021C04B20/0068C04B24/04
Inventor 张育新戴兴健王易李凯霖刘晓英张学雷封丽张益帆饶劲松段继周李海燕包志豪杜玉成吴俊书吴一壮赵晨皓张嘉怡晏鹏董帆
Owner CHONGQING UNIV
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