Method for preparing molybdenum trioxide nanowire by sol-gel method

A molybdenum trioxide, sol-gel technology, applied in the direction of molybdenum oxide/molybdenum hydroxide, etc., can solve the problems of irregular product structure distribution, high requirements on experimental equipment, limited industrial application, etc., and achieves low requirements on experimental equipment and is widely popularized Application value, high uniformity effect

Pending Publication Date: 2022-07-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have shortcomings to a certain extent. For example, the distribution of the product structure obtained by the hydrothermal method is irregular, resulting in a limited application range. On the other hand, the requirements for experimental equipment are high, which limits industrial applications.
The above methods are complicated to operate, time-consuming, and require high experimental equipment, which limits the application of large-area preparation

Method used

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  • Method for preparing molybdenum trioxide nanowire by sol-gel method
  • Method for preparing molybdenum trioxide nanowire by sol-gel method
  • Method for preparing molybdenum trioxide nanowire by sol-gel method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Mix 0.5 mol of anhydrous ammonium molybdate and 1.5 mol of anhydrous citric acid, stir magnetically for 4 hours at room temperature, dissolve in 5 mL of N,N-dimethylformamide (DMF) solvent, and let stand for 24 hours at room temperature Then, with the sufficient progress of the hydrolysis and polycondensation reactions, a uniform sol-gel precursor is formed.

[0045] The silica glass substrate with N 2 Plasma cleaning was performed for 1 min, and 300 μL of the precursor solution after aging (aging temperature was room temperature for 24 h) was taken to completely cover the silica glass substrate, and then spin-coating at 1000 rpm for 10 s. Finally, sintered in a 673K ​​muffle furnace for 15 min to obtain a thin film sample.

[0046] figure 2 It is the XRD picture of the molybdenum trioxide nanowire prepared in Example 1. It can be seen from the figure that all the characteristic diffraction peaks of the prepared sample and the pure-phase molybdenum trioxide JCPDS card...

Embodiment 2

[0052] Mix 0.5 mol of anhydrous ammonium molybdate and 2 mol of anhydrous citric acid, stir magnetically for 4 hours at room temperature, dissolve in 5 mL of ethylene glycol methyl ether (2-ME) solvent, stand at room temperature for 24 hours, With the full progress of the hydrolysis and polycondensation reactions, a uniform sol-gel precursor is formed.

[0053] The silica glass substrate with N 2 Plasma cleaning was performed for 1 min, and 300 μL of the precursor solution after aging (aging temperature was room temperature for 24 h) was taken to completely cover the silica glass substrate, and then spin-coating at 1000 rpm for 10 s. Finally, sintered in a 673K ​​muffle furnace for 15 min to obtain a thin film sample.

Embodiment 3

[0055] Mix 0.5 mol of anhydrous ammonium molybdate and 2.5 mol of anhydrous citric acid, stir magnetically for 4 hours at room temperature, dissolve in 5 mL of N,N-dimethylacetamide (DMAC) solvent, and let stand for 24 hours at room temperature Then, with the sufficient progress of the hydrolysis and polycondensation reactions, a uniform sol-gel precursor is formed.

[0056] The silica glass substrate with N 2 After plasma cleaning for 1 min, take 300 μL of the precursor solution after aging (the aging temperature is room temperature, and the time is 24 h) to completely cover the silica glass substrate, and then spin-coating at 1000 rpm for 10 s. Finally, sintered in a 673K ​​muffle furnace for 15 min to obtain a thin film sample.

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Abstract

The invention discloses a method for preparing molybdenum trioxide nanowires by a sol-gel method, and belongs to the technical field of preparation of molybdenum trioxide nanomaterials. The specific preparation method comprises the following steps: mixing anhydrous ammonium molybdate and anhydrous citric acid according to a molar ratio of 1: 3-1: 5 at room temperature, then dissolving the mixture in an organic solvent, and standing the obtained reaction system at room temperature to obtain a sol-gel precursor; and aging the sol-gel precursor, coating the sol-gel precursor on a silica glass substrate, and sintering to obtain the molybdenum trioxide nanowire film. The molybdenum trioxide nanowire with the orthogonal cubic structure is efficiently prepared by adopting a sol-gel method, and the preparation method is the simplest preparation method at present, has the characteristics of short time consumption, easiness in control, low cost and no pollution, has low requirements on experimental equipment, and is suitable for large-area preparation industry.

Description

technical field [0001] The invention relates to the technical field of preparation of molybdenum trioxide nanomaterials, in particular to a method for preparing molybdenum trioxide nanowires by a sol-gel method. Background technique [0002] Nanomaterials have attracted extensive attention due to their special physical and chemical properties. In terms of physical properties, as the particle size of the material decreases, the surface energy and surface tension of the ions increase, and the specific surface area also increases. And when the particle size is comparable to the superconducting coherence wavelength, Bohr radius and electron de Broglie wavelength, nanomaterials will exhibit obvious electronic effects. In terms of chemical properties, compared with bulk materials of the same composition, the adsorption force of nanomaterials is greatly improved, and the reactivity and chemical reaction characteristics are higher. Nanomaterials have the characteristics of small pa...

Claims

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Application Information

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IPC IPC(8): C01G39/02
CPCC01G39/02C01P2002/72C01P2004/03C01P2004/04C01P2004/16
Inventor 卫婷婷杨银润丛树仁许方杰兰婷李忠芳宋庆和
Owner KUNMING UNIV OF SCI & TECH
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