A three-dimensional integrated light-to-heat conversion material and its preparation method

A photothermal conversion material and integrated technology, applied in chemical instruments and methods, metal material coating process, general water supply saving, etc., can solve problems such as inappropriate photothermal seawater desalination, uneven graphene growth, and complex preparation. , to achieve the effect of excellent self-cleaning ability, stable evaporation rate and fast preparation

Active Publication Date: 2022-04-19
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The material uses processes such as vacuum defoaming and curing, and the preparation is complicated.
Moreover, the prepared material has high thermal conductivity. Although the high thermal conductivity makes the material have good light-to-heat conversion ability, the heat generated in practical application will be quickly transferred to the whole seawater or other materials in contact with the material. In terms of materials, it causes high heat loss, so it is not suitable for the field of photothermal seawater desalination
Moreover, this patent uses absolute ethanol as a carbon source to grow graphene, and graphene grows unevenly and has a large number of defects.

Method used

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  • A three-dimensional integrated light-to-heat conversion material and its preparation method

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Embodiment 1

[0031] Preparation process in embodiment 1 is:

[0032] The first step: nickel foam pretreatment

[0033]Sonicate 3*3cm nickel foam in dilute hydrochloric acid (3mol / L), acetone, absolute ethanol, and deionized water for 5 minutes respectively.

[0034] The second step: CVD growth of graphene

[0035] First, put nickel foam into a tube furnace and heat it to 1035°C at 10°C / min under an atmosphere of argon (300sccm); secondly, heat-preserve and anneal foamed nickel at a temperature of 1035°C and a mixed atmosphere of argon (50sccm) and hydrogen (50sccm) 15 minutes; after the annealing is completed, the gas atmosphere in the tube furnace remains unchanged, and the temperature drops to 1000°C; after reaching the growth temperature of 1000°C, methane is introduced as a carbon source, and the mixed gas in the tube furnace becomes 20sccm hydrogen, 50sccm Argon and 100 sccm methane, incubation for 20 minutes. After the growth is completed, stop feeding hydrogen and methane, and sl...

Embodiment 2

[0042] The difference between embodiment 2 and embodiment 1 is that the hydrothermal time reduces, specifically as follows:

[0043] The first step: nickel foam pretreatment

[0044] Nickel foam was ultrasonically treated in dilute hydrochloric acid (3mol / L), acetone, absolute ethanol and deionized water for 5 minutes respectively.

[0045] The second step: CVD growth of graphene

[0046] First, put nickel foam into a tube furnace and heat it to 1035°C at 10°C / min under an atmosphere of argon (300sccm); secondly, heat-preserve and anneal foamed nickel at a temperature of 1035°C and a mixed atmosphere of argon (50sccm) and hydrogen (50sccm) 15 minutes; after the annealing is completed, the gas atmosphere in the tube furnace remains unchanged, and the temperature drops to 1000°C; after reaching the growth temperature of 1000°C, methane is introduced as a carbon source, and the mixed gas in the tube furnace becomes 20sccm hydrogen, 50sccm Argon and 100 sccm methane, incubation ...

Embodiment 3

[0053] The difference between embodiment 3 and embodiment 1-2 is to reduce the hydrothermal time again, specifically as follows:

[0054] The first step: nickel foam pretreatment

[0055] Nickel foam was ultrasonically treated in dilute hydrochloric acid (3mol / L), acetone, absolute ethanol and deionized water for 5 minutes respectively.

[0056] The second step: CVD growth of graphene

[0057] First, put nickel foam into a tube furnace and heat it to 1035°C at 10°C / min under an atmosphere of argon (300sccm); secondly, heat-preserve and anneal foamed nickel at a temperature of 1035°C and a mixed atmosphere of argon (50sccm) and hydrogen (50sccm) 15 minutes; after annealing, the gas atmosphere in the tube furnace remains unchanged, and the temperature drops to 1000°C; after reaching the growth temperature of 1000°C, methane is introduced as a carbon source, and the mixed gas in the tube furnace becomes 20sccm hydrogen, 50sccm Argon and 100 sccm methane, incubation for 20 minut...

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Abstract

The invention discloses a three-dimensional integrated light-to-heat conversion material and a preparation method thereof. It prepares a foamed nickel graphene material by CVD on a pretreated foamed nickel substrate, and then prepares Ni-G-MoO3 by hydrothermal ‑x, the gas required for CVD is argon, high-purity hydrogen and high-purity methane; the performance parameters of the material are: thickness 0.5mm, evaporation rate under one light intensity is 1.50kg / m2h, efficiency is 95.8%, cycle stability More than 36h, hydrophilicity and hydrophobicity are superhydrophilicity. The invention combines graphene, molybdenum oxide and porous nickel foam through CVD and oxidation processes, which ensures that the material has a strong interfacial bonding force, and has super-hydrophilicity after one-step hydrothermal treatment, which can ensure the porous water absorption capacity of the material , At the same time, after the graphene covers the nickel foam surface, it can protect the application of the overall material in the marine environment and increase the service life of the material.

Description

technical field [0001] The invention relates to a photothermal conversion material and a preparation method, belonging to the field of seawater desalination. Specifically, it discloses a light-to-heat conversion material with a heterogeneous structure obtained by using CVD and hydrothermal methods and a preparation method. The material has the characteristics of high efficiency and high hydrophilicity. Background technique [0002] With the world's population increasing and freshwater resources increasingly scarce, water scarcity is considered one of the world's most serious challenges. Solar-powered seawater desalination technology using solar energy, an abundant and environmentally friendly energy source, seems to be an effective way to alleviate the shortage of fresh water resources. With the gradual progress of research in this area, the solar desalination technology through local heating of the air-water interface has been proposed and has received more and more attent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/14C01B32/186C01G39/02C23C16/26C23C18/12C02F103/08
CPCC02F1/14C01B32/186C01G39/02C23C16/26C23C18/1216C01P2004/03C02F2103/08Y02P20/129Y02A20/212Y02A20/124Y02A20/142
Inventor 崔洪芝魏娜赵明岗宫李科徐瑞琪李琪
Owner OCEAN UNIV OF CHINA
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