Preparation method and application of multistage-structured flower-shaped molybdenum trioxide

A technology of molybdenum trioxide and flower shape, which is applied in the field of preparation of molybdenum trioxide, can solve the problems of complex process, high reaction temperature, and low sensitivity of propanol, and achieve simple and efficient preparation process, low hydrothermal temperature, good gas The effect of sensitivity

Inactive Publication Date: 2013-01-16
HEILONGJIANG UNIV
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of complex process, high reaction temperature and low sensitivity of molybdenum trioxide to propanol in the existing preparation method of molybdenum trioxide, and to provide a multi-level structure flower-shaped trioxide Preparation method and application of molybdenum

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  • Preparation method and application of multistage-structured flower-shaped molybdenum trioxide
  • Preparation method and application of multistage-structured flower-shaped molybdenum trioxide
  • Preparation method and application of multistage-structured flower-shaped molybdenum trioxide

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specific Embodiment approach 1

[0017] Specific embodiment one: the preparation method of multi-level structure flower-shaped molybdenum trioxide of the present embodiment is implemented according to the following steps:

[0018] 1. Transfer the glacial acetic acid solution of oxymolybdenum acetylacetonate with a molar concentration of 0.008-0.012 mol / L to the reaction kettle, heat and react at 140-160°C for 1-8 hours, and obtain a black powder;

[0019] 2. Wash the black powder obtained in step 1 with absolute ethanol for 3 to 5 times, and then vacuum-dry at 60 to 70° C. for 8 to 15 hours to obtain molybdenum trioxide with a multi-level flower shape.

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment is different from Embodiment 1 in that step 1 is heated and reacted at 145-153°C for 3-6 hours. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment is different from Embodiment 1 in that step 1 is heated and reacted at 151° C. for 4 hours. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides a preparation method and application of multistage-structured flower-shaped molybdenum trioxide, and relates to a preparation method and application of molybdenum trioxide. The invention aims to solve the problems that the process is complicated, the reaction temperature is high and molybdenum trioxide applied to a gas-sensitive element is low in propanol sensitivity in the existing preparation method of molybdenum trioxide. The preparation method comprises the following steps: heating a molybdenyl acetylacetonate glacial acetic acid solution, washing with anhydrous alcohol, and drying to obtain the multistage-structured flower-shaped molybdenum trioxide. The application comprises the following steps: mixing the multistage-structured flower-shaped molybdenum trioxide with glass powder, adding terpineol, blending into a paste, coating on the surfaces of a ceramic tube having two metal electrodes, drying, performing thermal treatment, and then implanting heater strips to obtain a gas-sensitive element. According to the invention, the preparation method of multistage-structured flower-shaped molybdenum trioxide adopts a simple hydrothermal method, the hydrothermal temperature is low, and the molybdenum trioxide applied to the gas-sensitive element is favorable in propanol sensitivity. The invention is applicable to the fields of gas-sensitive sensors, catalysis and chemical adsorption.

Description

technical field [0001] The invention relates to a preparation method and application of molybdenum trioxide. Background technique [0002] In recent years, molybdenum oxide has been widely used in catalysis, sensors, battery materials, magnetic recording materials and color-changing materials due to its excellent physical and chemical properties. People have used different methods to prepare multi-level molybdenum trioxide materials with different building blocks, such as: nano-sheet helical multi-level structure and nano-rod multi-level structure molybdenum trioxide, and there are many nanoribbon structures Molybdenum trioxide material with hierarchical structure has not been reported yet. In addition, the preparation process of the above-mentioned several hierarchical structure materials has disadvantages such as high reaction temperature and the need to add templates. A recent literature reports the preparation method of molybdenum trioxide with sea urchin-like multi-le...

Claims

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Application Information

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IPC IPC(8): C01G39/02B82Y30/00B82Y40/00
Inventor 徐英明宋肖肖霍丽华程晓丽张现发高山赵辉
Owner HEILONGJIANG UNIV
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