Preparation method of a three-dimensional bouquet-structured α-molybdenum carbide@carbon with high-efficiency light-to-heat conversion properties

A light-to-heat conversion and molybdenum carbide technology, which is applied in the direction of carbon preparation/purification, chemical instruments and methods, tungsten/molybdenum carbides, etc., can solve the problems of harsh preparation conditions, affecting application effects, and easy spontaneous combustion, etc., to reduce Material cost, good reproducibility, effect of reduced usage

Active Publication Date: 2021-06-22
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention aims to solve the technical problems that existing molybdenum carbide preparation methods have disadvantages such as harsh preparation conditions, easy agglomeration, easy spontaneous combustion, and small specific surface area, which greatly affect its application effect in the field of solar seawater desalination, and provide a Preparation method of a three-dimensional bouquet-structured α-molybdenum carbide@carbon with high-efficiency light-to-heat conversion properties

Method used

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  • Preparation method of a three-dimensional bouquet-structured α-molybdenum carbide@carbon with high-efficiency light-to-heat conversion properties
  • Preparation method of a three-dimensional bouquet-structured α-molybdenum carbide@carbon with high-efficiency light-to-heat conversion properties
  • Preparation method of a three-dimensional bouquet-structured α-molybdenum carbide@carbon with high-efficiency light-to-heat conversion properties

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specific Embodiment approach 1

[0021] Specific implementation mode 1: This implementation mode is a preparation method of a three-dimensional bouquet structure α-molybdenum carbide@carbon with high-efficiency light-to-heat conversion characteristics, which is specifically carried out according to the following steps:

[0022] 1. Add molybdenum powder and aqueous hydrogen peroxide solution with a mass fraction of 30% to the liquid alcohol in turn, stir for 24h~48h, then add melamine, continue stirring for 0.5h~48h, and then centrifuge at a speed of 3000rpm~5000rpm for 5min~ 10min, dry at last, obtain molybdenum precursor;

[0023] The mass of described molybdenum powder and mass fraction are 1g:(0.5mL~50mL);

[0024] The mass of described molybdenum powder and the volume ratio of liquid alcohol are 1g:(10mL~500mL);

[0025] The mass ratio of described molybdenum powder and melamine is 1:(1~50);

[0026] 2. Mechanically mix the molybdenum precursor obtained in step 1 with urea, then place the mixture in a c...

specific Embodiment approach 2

[0027] Embodiment 2: This embodiment differs from Embodiment 1 in that the liquid alcohol described in step 1 is one or a mixture of absolute ethanol, ethylene glycol and isopropanol. Others are the same as the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the drying temperature in step 1 is 40°C. Others are the same as those in Embodiment 1 or 2.

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Abstract

A method for preparing a three-dimensional flower bouquet structure α-molybdenum carbide@carbon with high-efficiency light-to-heat conversion properties, involving an α-MoC with high-efficiency light-to-heat conversion properties 1‑x Preparation method of @C. The present invention aims to solve the technical problems that the existing molybdenum carbide preparation method has harsh preparation conditions, easy agglomeration, easy spontaneous combustion, and small specific surface area, which greatly affects its application effect in the field of solar seawater desalination. The α-MoC of the three-dimensional bouquet structure prepared by the present invention 1‑x The specific surface area of ​​@C is 300~600m 2 g ‑1 , the pore volume is 2~5cm 3 g ‑1 , and has superhydrophobicity; the three-dimensional bouquet structure α‑MoC 1‑x @C at low load 0.01~1mgcm ‑2 , the absorbance in the range of 200-2500nm is 92%, under simulated sunlight (1kW·m ‑2 ) under the distilled water rate of 1.77kgm ‑2 h ‑1 .

Description

technical field [0001] The invention relates to an α-MoC with high-efficiency light-to-heat conversion characteristics 1-x Preparation method of @C. Background technique [0002] Seawater desalination is an effective way to solve the water crisis. Conventional seawater desalination technologies such as multi-effect distillation and multi-stage flash evaporation can achieve desalination of seawater, but the problems of high energy consumption and high cost limit their wide application. Solar seawater desalination is a seawater desalination technology driven by solar energy, which is an important direction for the development of low energy consumption, green and economical seawater desalination technology. Although inorganic semiconductor light-to-heat conversion materials show certain photodistillation ability due to the advantages of low cost, easy-to-adjust morphology, and high light absorption rate, they are currently limited by problems such as poor repeatability, small...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/949C01B32/05C02F1/14C02F103/08
CPCC01P2002/80C01P2002/84C01P2004/03C01P2004/04C01P2006/12C01P2006/14C01P2006/17C02F1/14C02F2103/08C01B32/05C01B32/949Y02A20/124Y02A20/142Y02A20/212
Inventor 于淼朱林孙晔孙磊张弘姜婷婷
Owner HARBIN INST OF TECH
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