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Water purification composite material and preparation method and application thereof

A composite material and water purification technology, applied in chemical instruments and methods, water/sewage treatment, light water/sewage treatment, etc., can solve the problems of low solar energy utilization rate, low water purification rate, low adsorption of pollutants and harmful bacteria, etc. problems, to achieve the effect of improving water purification efficiency, improving decomposition efficiency, and high specific surface area

Active Publication Date: 2017-11-17
深圳市元宇智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional photocatalyst materials, such as: TiO 2 , ZnO and other band gaps are too wide, can only absorb the ultraviolet band of sunlight, the utilization rate of solar energy is low, and the bactericidal effect is poor
Later, people used organic dye sensitization and quantum dot sensitization technology to expand the spectral response range of photocatalysts, and the photocatalytic effect has been improved to a certain extent, but organic dyes and quantum dots have potential environmental hazards and certain toxicity.
In addition, the degradation of pollutants in the process of water purification is usually only carried out on the surface of water purification materials, while traditional water purification materials have a low specific surface area and low adsorption of pollutants and harmful bacteria. Therefore, the rate of water purification lower
In addition, in traditional water purification materials, carriers are prone to recombination during transport, which reduces the quantum efficiency of their photochemical reactions.

Method used

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  • Water purification composite material and preparation method and application thereof
  • Water purification composite material and preparation method and application thereof
  • Water purification composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of water purification composite material, comprising the following steps:

[0047] 1. Take the glassy carbon substrate, wash and dry it for later use, and vacuum-deposit a layer of Cu electrode film on the above substrate;

[0048] 2. Graphene oxide is grown onto the surface of the above-mentioned glassy carbon substrate evaporated with Cu electrode film by chemical vapor deposition method, the specific process is as follows:

[0049] Firstly, a layer of Cu electrode film with a thickness of about 10nm is evaporated on the glassy carbon substrate by vacuum thermal evaporation equipment; then, it is placed in a chemical vapor deposition (CVD) tube furnace, vacuumed, heated to 400°C, and put into Ethylene and argon mixed gas, the molar ratio is 1:10, the total gas flow rate is 11mL / min, and the time is 30-60min, so as to obtain graphene with a thickness of 1-5 layers; then, the graphene is oxidized to Graphene oxide. Among them, the thickness of the...

Embodiment 2

[0060] A preparation method of water purification composite material, comprising the following steps:

[0061] 1. Take glassy carbon fibers as the substrate, and grow graphene oxide onto the surface of the substrate. The specific process is: first vapor-deposit copper electrodes on the glassy carbon substrate, and then grow graphene oxide (GO) onto the substrate by vapor-phase chemical deposition according to the above method. On the substrate, the specific steps are as follows: the preparation steps of GO are as follows:

[0062] Firstly, a layer of Cu electrode film with a thickness of about 10nm is evaporated on the glassy carbon substrate through vacuum thermal evaporation equipment; then, it is placed in a chemical vapor deposition (CVD) tube furnace, vacuumed, heated to 380°C, and put into Ethylene and argon mixed gas, the molar ratio is 1:8, the gas flow rate is 9mL / min, and the time is 35min, so as to obtain graphene with a thickness of 1-3 layers; the graphene is oxid...

Embodiment 3

[0067] A preparation method of water purification composite material, comprising the following steps:

[0068] 1, get polyester (PET) film to make substrate, adopt the method identical with embodiment 2 to grow graphene oxide to substrate surface, the physical parameter of the obtained two-dimensional layered graphene oxide is also with embodiment 2;

[0069] 2. Preparation of MoS 2 2D materials:

[0070] Weigh 1g MoS 2 The solid was added to 200mL NMP for ultrasonication for 10h, and the ultrasonic power was 500W. After the ultrasonication was completed, it was centrifuged at a speed of 3000rpm for 30min. After centrifugation, the supernatant was collected and further centrifuged at a speed of 8000rpm to collect the lower precipitate to obtain the exfoliated sheet MoS 2 Two-dimensional materials; among them, the prepared MoS 2 The thickness of the two-dimensional material is 1-3nm, the number of layers is 1-3 layers, its band gap is 1.8eV, the valence band energy is -5.7eV...

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Abstract

The invention provides a water purification composite material. The water purification composite material comprises a substrate and a first two-dimensional material layer and a second two-dimensional material layer which are laminated on the substrate in order, wherein the materials of the first two-dimensional material layer and the second two-dimensional material layer are different, which are respectively selected from one of black phosphorus, graphene, graphene oxide, graphdiyne, transition metal chalcogenide, transition metal oxide and transition metallic carbide; a band gap of a first two-dimensional material and a second two-dimensional material is 0.3-0.4 eV; and a valence band and a conduction band of the second two-dimensional material are respectively higher than or respectively lower than the valence band and the conduction band of the first two-dimensional material. The specific surface area of the water purification composite material is large, and can use the sun radiation from a UV wave band to a far-infrared wave band, more separation charge carriers are generated, the migration rate of the charge carriers is high, the charge carrier composite is avoided, and the water purification efficiency is increased. The invention also provides a preparation method and an application of the water purification composite material.

Description

technical field [0001] The invention relates to the technical field of water purification, in particular to a water purification composite material and its preparation method and application. Background technique [0002] With the rapid development of the global economy, the problem of water pollution has become increasingly prominent. Many health problems of the human body are caused by drinking unclean water. Therefore, water purification has become an urgent problem related to human health. [0003] Usually people use photocatalyst materials to convert solar energy into chemical energy to achieve water purification. The traditional photocatalyst materials, such as: TiO 2 , ZnO and other band gaps are too wide, can only absorb the ultraviolet band of sunlight, the utilization rate of solar energy is low, and the bactericidal effect is poor. Later, people used organic dye sensitization and quantum dot sensitization technology to expand the spectral response range of phot...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F1/30
CPCC02F1/30C02F1/467
Inventor 张晗仇萌张家宜
Owner 深圳市元宇智科技有限公司
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