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CN-121990633-A - Preparation method and application of three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification

CN121990633ACN 121990633 ACN121990633 ACN 121990633ACN-121990633-A

Abstract

A preparation method and application of a three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification are disclosed, wherein polyoxometallate and aniline are dissolved in a solvent system and uniformly mixed, then the obtained solution is uniformly poured on a melamine foam substrate, after full impregnation, the three-dimensional porous photo-thermal material is subjected to solvothermal reaction in a reaction kettle, and after the reaction is finished, the three-dimensional porous photo-thermal material modified by polyoxometallate dominant self-assembly is obtained through washing and drying. The three-dimensional porous photo-thermal material with the self-assembly modification mainly based on polyoxometallate has the advantages that photo-thermal site construction and surface hydrophobic modification are perfectly fused, so that the efficient wrapping and hydrophobic modification of the photo-thermal material on the surface of the three-dimensional porous adsorbent are realized, and meanwhile, the solar steam generation and crude oil recovery are realized.

Inventors

  • CHENG SIHANG
  • LIU CUIMEI

Assignees

  • 渤海大学

Dates

Publication Date
20260508
Application Date
20260304

Claims (10)

  1. 1. The preparation method of the three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification is characterized by comprising the following steps of: According to the mol volume of polyoxometallate H 3 PMo 12 O 40 and aniline of 0.1 (5-15) mmol/mu L, dissolving polyoxometallate and aniline in a solvent system, uniformly mixing, uniformly pouring the obtained solution on a melamine foam substrate, fully soaking, performing solvothermal reaction in a reaction kettle, washing and drying after the reaction is finished, and obtaining the polyoxometallate-dominated self-assembled modified three-dimensional and porous photo-thermal material.
  2. 2. The preparation method of the three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification, which is disclosed in claim 1, is characterized in that the reaction temperature is 140 ℃ and the reaction time is 3h.
  3. 3. The method for preparing a three-dimensional porous photothermal material based on polyoxometallate-dominant hydrophilic-hydrophobic modification according to claim 1, wherein the molar volume of the polyoxometallate and aniline is 0.01 mmol/μl.
  4. 4. The preparation method of the three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification, which is disclosed in claim 1, is characterized in that the molar volume ratio of polyoxometallate to solvent is 0.1:8mmol/mL.
  5. 5. The method for preparing the three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification according to claim 1, wherein the solvent system is a mixed system of Oleic Acid (OA) and ethanol solution.
  6. 6. The method for preparing a three-dimensional porous photothermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification according to claim 4, wherein a volume ratio of Oleic Acid (OA) to ethanol solution is 1:3.
  7. 7. The method for preparing a three-dimensional porous photothermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification according to claim 1, wherein the solvent system is 8mL, and the size of the melamine foam is 2cm multiplied by 1cm.
  8. 8. The preparation method of the three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification, which is disclosed in claim 1, is characterized in that water and absolute ethyl alcohol are used for alternatively soaking and washing for 3 times during washing.
  9. 9. Use of a three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification prepared by the preparation method of claim 1 in solar steam generation and sea water desalination.
  10. 10. Use of a three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification prepared by the preparation method of claim 1 for treating offshore spills and desalination of sea water.

Description

Preparation method and application of three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification Technical Field The invention belongs to the field of solar photo-thermal conversion, relates to a preparation method and application of a three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification, and in particular relates to solar photo-thermal sea water desalination and offshore spilled oil recovery driven by the photo-thermal material. Background With the growth of global population and the acceleration of industrialization and urbanization processes, the increasing shortage of fresh water resources has become an important challenge for social development. The traditional sea water desalting technology such as reverse osmosis, electrodialysis and distillation has the problems of high energy consumption, high running cost, water environment pollution and the like, and the practical application is severely limited. The solar light driving interface evaporation technology is expected to become an effective scheme for solving the shortage of global water resources because the technology can utilize renewable solar energy to drive seawater to evaporate so as to obtain fresh water, and can directly produce fresh water with the minimum carbon footprint. The existing common photo-thermal conversion materials (such as graphene, carbon nano tube, nano gold, nano silver, nano oxide, nano silicon and the like) still face the problem of insufficient heat energy transmission efficiency from the active material to water molecules. By optimizing the components of the photo-thermal conversion material and the water vapor transmission structure, the solar energy interface evaporation efficiency is expected to be further improved. However, in practical application scenarios, solar desalination faces more serious environmental challenges. On the one hand, the sea water desalination is faced with the problems of salt accumulation, greasy dirt or marine dirt, etc., resulting in the problems of blockage and corrosion. On the other hand, frequent occurrence of heavy crude oil leakage, including offshore oil fields, cargo transported by tankers, and fuel used by ships, results in formation of a fouling layer on the ocean surface. When the photothermal material is contacted with oil-containing seawater, crude oil with high viscosity can be adsorbed and wrapped on the surface and the inner pore canal of the material. Although the photo-thermal adsorbent with the three-dimensional porous structure can realize crude oil absorption and sea water desalination by reducing the viscosity of crude oil and under solar radiation, the material has poor functional performance due to the factors of complex preparation process, easy falling of photo-thermal components, high difficulty in hydrophobic modification of the whole surface and the like. Therefore, the novel photo-thermal functional material with high photo-thermal conversion efficiency, hydrophilic-hydrophobic functional sites, stable structure and simple preparation process is constructed, and the dual-functional application of solar photo-thermal sea water desalination and crude oil recovery is realized, so that the method has important significance. Disclosure of Invention The invention aims to solve the technical problem of providing a preparation method and application of a three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification, which can realize efficient wrapping and hydrophobic modification of the photo-thermal material on the surface of a three-dimensional porous adsorbent and realize solar steam generation and crude oil recovery. The technical scheme of the invention is as follows: the preparation method of the three-dimensional porous photo-thermal material based on polyoxometallate dominant hydrophilic-hydrophobic modification is characterized by comprising the following steps of: Dissolving polyoxometallate and aniline in a solvent system according to the molar volume of polyoxometallate H 3PMo12O40 to 15 mmol/mu L, uniformly mixing, uniformly pouring the obtained solution on a melamine foam substrate, fully soaking, performing solvothermal reaction in a reaction kettle, washing and drying after the reaction is finished, and obtaining the polyoxometallate-dominated self-assembled modified three-dimensional and porous photo-thermal material. Further, the reaction temperature was 140 ℃ and the reaction time was 3h. Further, the molar volume of the polyoxometallate and aniline is 0.01 mmol/μl. Further, the molar volume ratio of polyoxometalate to solvent was 0.1:8mmol/mL. Further, the solvent system is a mixed system of Oleic Acid (OA) and ethanol solution. Further preferably, the volume ratio of Oleic Acid (OA) to ethanol solution is 1:3. Further, the solvent system was 8mL and the melamine fo