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Photo-thermal conversion material with nano heterostructure as well as preparation method and application thereof

A technology of photothermal conversion materials and nano-heterostructures, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problem that the photothermal enhancement effect has not been reported, and the preparation process is not easy to large-scale and large-scale. Area production, complex preparation process, etc.

Active Publication Date: 2021-09-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although one-dimensional CNT (carbon nanotube) and two-dimensional rGO (reduced graphene oxide) have been widely used as photothermal conversion materials for solar interface seawater evaporators due to their excellent light absorption properties, but using their one-dimensional / two-dimensional The photothermal enhancement effect after compounding has not been reported so far
[0005] Document 1 (Advanced Sustainable Systems (2019)) records that gold nanoparticles are used, and gold nanospheres and nanostars are assembled into a nanocolloid ridge / disordered nanohole array structure using the light-trapping Papilio Paris forewing as a template; Document 2 (Nano Energy (2019)) describes the use of cordierite honeycomb ceramics and CuFeMnO 4 , and a layer of CuFeMnO is covered on the surface of the cordierite honeycomb ceramic substrate 4 To manufacture multifunctional honeycomb ceramic plates, the honeycomb light-trapping structure is beneficial to light harvesting and energy recovery; however, these methods require controlled synthesis of multi-metal oxides, and the preparation process of specific structures is relatively complicated and needs to be carried out step by step, and the attempts The preparation process is not easy for large-scale and large-area production, and then converted into photothermal conversion materials with practical application value

Method used

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  • Photo-thermal conversion material with nano heterostructure as well as preparation method and application thereof
  • Photo-thermal conversion material with nano heterostructure as well as preparation method and application thereof
  • Photo-thermal conversion material with nano heterostructure as well as preparation method and application thereof

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Embodiment 1

[0050] A method for preparing a light-to-heat conversion material with a nano-heterostructure, the steps are as follows:

[0051] (1) Prepare precursor CNT aqueous solution, precursor GO aqueous solution and HS nutrient solution respectively;

[0052] The preparation process of the precursor CNT aqueous solution is as follows: take MWCNT and add it to deionized water, stir, then add PVP, stir, and use a cell pulverizer to ultrasonically react with a power of 450w for 2 hours at a temperature of 25°C to obtain a uniformly dispersed precursor CNT Aqueous solution; the mass volume ratio of MWCNT, deionized water and PVP is 0.4g:50mL:10g;

[0053] The preparation process of the precursor GO aqueous solution is as follows: take GO and add it to deionized water, stir, then add PVP, stir, and use a cell pulverizer with a power of 450w to ultrasonically react for 2 hours at a temperature of 25°C to obtain a uniformly dispersed precursor GO. Aqueous solution; the mass volume ratio of ...

Embodiment 2

[0065] A method for preparing a light-to-heat conversion material with a nano-heterostructure, the steps are as follows:

[0066] (1) Prepare precursor CNT aqueous solution, precursor GO aqueous solution and HS nutrient solution respectively;

[0067] The preparation process of the precursor CNT aqueous solution is as follows: take MWCNT and add it to deionized water, stir, then add PVP, stir, and use a cell pulverizer to ultrasonically react for 1.9 hours with a power of 460w at a temperature of 26°C to obtain a uniformly dispersed precursor CNT aqueous solution; the mass volume ratio of MWCNT, deionized water and PVP is 0.4g:50mL:11g;

[0068] The preparation process of the precursor GO aqueous solution is as follows: take GO and add it to deionized water, stir, then add PVP, stir, and use a cell pulverizer to ultrasonically react for 1.9 hours with a power of 455w at a temperature of 26°C to obtain a uniformly dispersed precursor GO aqueous solution; the mass volume ratio ...

Embodiment 3

[0080] A method for preparing a light-to-heat conversion material with a nano-heterostructure, the steps are as follows:

[0081] (1) Prepare precursor CNT aqueous solution, precursor GO aqueous solution and HS nutrient solution respectively;

[0082] The preparation process of the precursor CNT aqueous solution is as follows: take MWCNT and add it to deionized water, stir, then add PVP, stir, and use a cell pulverizer with a power of 465w for 1.8h at a temperature of 27°C to obtain a uniformly dispersed precursor CNT aqueous solution; the mass volume ratio of MWCNT, deionized water and PVP is 0.4g:50mL:12g;

[0083] The preparation process of the precursor GO aqueous solution is as follows: take GO and add it to deionized water, stir, then add PVP, stir, and use a cell pulverizer to ultrasonically react with a power of 460w for 1.9h at a temperature of 27°C to obtain a uniformly dispersed precursor GO aqueous solution; the mass volume ratio of GO, deionized water and PVP is ...

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Abstract

The invention relates to a photo-thermal conversion material with a nano heterostructure and a preparation method and application thereof. The photo-thermal conversion material with a nano heterostructure is composed of a bacterial cellulose membrane and rGO and CNT distributed in the bacterial cellulose membrane. The rGO and the CNT form a heterostructure. In other words, the CNT grows on the surface of the rGO in situ to form an artificial wrinkle structure. The method comprises the following steps of: adding a bacillus xylinus original bacteria solution, a precursor CNT aqueous solution and a precursor GO aqueous solution into an HS nutrient solution for inoculation to obtain a bacterial cellulose composite membrane, and reducing GO in the bacterial cellulose composite membrane to obtain the photothermal conversion material with a nano heterostructure. According to the application, the photo-thermal conversion material with a nano heterostructure, the bacterial cellulose membrane and polystyrene foam are sequentially assembled together from top to bottom to form a solar interface seawater evaporator. A good light trapping phenomenon is shown through the heterostructure, energy lost due to reflection of sunlight is reduced, and the light absorption efficiency of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of light-to-heat conversion materials, and relates to a light-to-heat conversion material with a nano-heterostructure and its preparation method and application, in particular to a light-to-heat conversion material with a one-dimensional / two-dimensional nano-heterostructure and Its preparation method and application. Background technique [0002] The lack of drinking water is a problem related to human survival on a global scale. This problem has been greatly exacerbated by climate change, population growth, and water pollution in recent years. Meanwhile, solar-evaporative seawater desalination is seen as a very promising means of alleviating drinking water scarcity worldwide. [0003] Solar water evaporation is to convert solar energy into heat energy to the greatest extent, and heat the water body with the converted heat energy to generate water vapor. At this stage, there are three main ways of water e...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08K3/04C08J5/18C12P19/04C12N1/20C12R1/01
CPCC08J5/18C12P19/04C12N1/20C08J2301/02C08K3/041C08K3/042C08K2201/011C08K2201/005Y02A20/212
Inventor 金梦甜蔡一啸王华平陈仕艳屈向阳郑海林
Owner DONGHUA UNIV
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