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Photothermal composite material, and preparation method and application thereof

A composite material and photothermal technology, applied in chemical instruments and methods, other chemical processes, general water supply conservation, etc., can solve problems such as inability to efficiently complete seawater desalination and purification, low photothermal conversion efficiency, etc., and achieve large-scale The effect of production, improvement of desalination efficiency and simple technology

Active Publication Date: 2019-08-09
SHENZHEN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a photothermal composite material and its preparation method and application, aiming to solve the problem that the existing photothermal materials have low photothermal conversion efficiency and cannot efficiently complete seawater desalination and purification. The problem

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  • Photothermal composite material, and preparation method and application thereof
  • Photothermal composite material, and preparation method and application thereof
  • Photothermal composite material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A method for preparing a photothermal composite material, comprising the following steps:

[0047] 1) Pre-mix tetrabutyl titanate and ethanol at a mass ratio of 4:1 to prepare a mixed solution;

[0048] 2) Clean the melamine nano-sponge with ethanol in advance and dry it naturally, cut the dried melamine nano-sponge into discs with a radius of 1.5 cm and a thickness of 1 cm for use; the melamine nano-sponge Soaking in the mixed solution for 10 hours, using warm water at 60°C to heat the soaked sponge with hot steam, so that the tetrabutyl titanate adsorbed in the sponge is hydrolyzed into titanium dioxide, and a photothermal composite material precursor is obtained;

[0049] 3) In an argon-protected tube furnace, the temperature was raised to 300°C at a heating rate of 5°C / min to carbonize the photothermal composite material precursor to obtain the photothermal composite material, denoted as MT -300.

[0050] Electron microscanning is carried out to the photothermal c...

Embodiment 2

[0052] 1) Pre-mix tetrabutyl titanate and ethanol at a mass ratio of 3:1 to prepare a mixed solution;

[0053] 2) Clean the melamine nano-sponge with ethanol in advance and dry it naturally, cut the dried melamine nano-sponge into discs with a radius of 1.5 cm and a thickness of 1 cm for use; the melamine nano-sponge Soaking in the mixed solution for 10 hours, using warm water at 50°C to heat the soaked sponge with hot steam, so that the tetrabutyl titanate attached to the sponge is hydrolyzed into titanium dioxide, and a photothermal composite material precursor is obtained;

[0054] 3) In an argon-protected tube furnace, heat up to 400°C at a heating rate of 5°C / min to carbonize the precursor of the photothermal composite material to prepare the photothermal composite material, denoted as MT -400.

Embodiment 3

[0056] 1) Pre-mix tetrabutyl titanate and ethanol at a mass ratio of 3:1 to prepare a mixed solution;

[0057] 2) Clean the melamine nano-sponge with ethanol in advance and dry it naturally, cut the dried melamine nano-sponge into discs with a radius of 1.5 cm and a thickness of 1 cm for use; the melamine nano-sponge Soaking in the mixed solution for 12 hours, using warm water at 40°C to heat the soaked sponge with hot steam, so that the tetrabutyl titanate attached to the sponge is hydrolyzed into titanium dioxide, and a photothermal composite material precursor is obtained;

[0058] 3) In an argon-protected tube furnace, the temperature was raised to 500°C at a heating rate of 5°C / min to carbonize the precursor of the photothermal composite material to obtain the photothermal composite material, denoted as MT -500.

[0059] The photothermal composite material prepared in Example 1-Example 3 is used as the photothermal seawater desalination material, and the seawater is desa...

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Abstract

The invention discloses a photothermal composite material, and a preparation method and an application thereof. The method comprises the following steps: premixing tetrabutyl titanate with an alcoholsolvent according to a predetermined ratio to prepare a mixed solution; soaking sponge in the mixed solution, and heating the soaked sponge by using hot steam to obtain a photothermal composite precursor; and placing and carbonizing the photothermal composite precursor in an argon-protected tubular furnace to prepare the photothermal composite material. The preparation method of the photothermal composite material has the advantages of low cost, simple technology and realization of large-scale production, and the obtained photothermal composite material has a high light absorption capacity, ahigh water transportation capacity and a high photothermal conversion efficiency, and can be applied to photothermal seawater desalination treatment in order to effectively improve the seawater desalination efficiency.

Description

technical field [0001] The invention relates to the field of photothermal materials, in particular to a photothermal composite material and a preparation method thereof. Background technique [0002] With the continuous development of society, the environmental pollution problem has become an important factor restricting development. Among them, the shortage of water resources caused by water pollution has made people pay more attention to the control of water pollution. Seawater purification and desalination, as a method for efficiently obtaining freshwater resources, has attracted widespread attention from researchers. [0003] However, the current traditional seawater desalination methods, such as multi-effect distillation, osmotic membrane, and multi-stage flash evaporation, all have problems such as bulky, high energy consumption, large carbon emissions, and low desalination efficiency. Seawater desalination technology using solar photodistillation is low-carbon and e...

Claims

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Application Information

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IPC IPC(8): C09K3/00C02F1/14C02F103/08
CPCC09K3/00C02F1/14C02F2103/08Y02A20/142Y02A20/212Y02A20/124Y02P20/10
Inventor 曾昱嘉龙垚伽黄绍龙李凯敏
Owner SHENZHEN UNIV
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