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Molybdate and preparation method thereof

A technology of molybdate and molybdenum source, which is applied in chemical instruments and methods, molybdenum compounds, inorganic chemistry, etc., can solve the problems of difficult synthesis and difficult synthesis of nanostructured molybdate materials

Inactive Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

literature( Chem. Commun. , 2008, 5601) reported that molybdate has a complex crystal structure, and nanostructured molybdate materials are relatively difficult to synthesize, especially hollow nanostructured molybdate materials are more difficult to synthesize

Method used

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  • Molybdate and preparation method thereof
  • Molybdate and preparation method thereof
  • Molybdate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take commercial molybdenum oxide powder 10mmol and add to 70ml of 30% H 2 o 2 solution, stirred at room temperature for 1 day, then transferred to a hydrothermal reaction kettle, and kept in an oven at 180°C for 24 hours. Then it is taken out, centrifuged, washed three times with deionized water, then washed three times with ethanol, and dried at low temperature to obtain a white powder, which is a molybdenum oxide nanometer square rod material.

[0034] Add the molybdenum oxide nano-square rod-shaped material prepared above into the mixed system of water and ethanol, the weight ratio of water and ethanol is 5 / 1, stir at 70°C for half an hour, and then add FeCl 3 Alcohol aqueous solution, added to the above suspension system, wherein, FeCl 3 with MoO 3The molar ratio is 2:3; then, aging for 24 hours to obtain a brownish-red suspension, centrifuged, washed three times with deionized water, then washed three times with ethanol, and dried at low temperature to obtain a ...

Embodiment 2

[0038] 2 M hydrochloric acid was added dropwise to 10 mmol of ammonium heptamolybdate solution, stirred at room temperature for 2 days, then 70 ml of the solution was transferred to a hydrothermal reaction kettle, and kept in an oven at 180°C for 24 hours. Then it is taken out, centrifuged, washed three times with deionized water, then washed three times with ethanol, and dried at low temperature to obtain a white powder, which is a molybdenum oxide nanometer square rod material.

[0039] Add the molybdenum oxide nano-square rod-shaped material prepared above into the mixed system of water and ethanol, the weight ratio of water and ethanol is 10 / 1, stir at 100°C for 1 hour, and then add FeCl 3 Alcohol aqueous solution, added to the above suspension system, FeCl 3 with MoO 3 The molar ratio is 1:1; then, aging for 24 hours to obtain a brown-red suspension, centrifuged, washed three times with deionized water, then washed three times with ethanol, and dried at low temperature t...

Embodiment 3

[0043] Take commercial molybdenum oxide powder 10mmol and add to 70ml of 30% H 2 o 2 solution, stirred at room temperature for 1 day, then transferred to a hydrothermal reaction kettle, and kept in an oven at 180°C for 24 hours. Then it is taken out, centrifuged, washed three times with deionized water, then washed three times with ethanol, and dried at low temperature to obtain a white powder, which is a molybdenum oxide nanometer square rod material.

[0044] Add the molybdenum oxide nanometer square rod material prepared above into the mixed system of water and propanol, the weight ratio of water and propanol is 5 / 1, stir at 70°C for half an hour, and then add FeCl 3 Alcohol aqueous solution, added to the above suspension system, wherein, FeCl 3 with MoO 3 The molar ratio is 3:4; then, aging for 24 hours to obtain a brown-red suspension, centrifuged, washed three times with deionized water, then washed three times with ethanol, and dried at low temperature to obtain a da...

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Abstract

The invention relates to molybdate and a preparation method thereof. The technical scheme of the preparation method comprises the following steps: 1) hydrothermal synthesis of monocrystalline molybdenum oxide nano tetragonal rods; 2) preparation of a MoO3 / MOx one-dimensional core-shell structure through surface hydrolysis and deposition; and 3) preparation of molybdate Mx(MoO4)y having a nano hollow structure through static air heat treatment. Thus, the molybdate having a nano hollow structure is synthesized; and the invention can be used for industrial production of molybdate having a nano hollow structure.

Description

technical field [0001] The invention relates to a molybdate and a preparation method thereof. Background technique [0002] Molybdate is an important family of inorganic materials. It has a wide range of applications in optics, microwaves, scintillators, sensors, semiconductors, catalysis, etc., and has attracted much attention and attention from interdisciplinary fields such as physics, chemistry, materials science, and biological sciences. . In the field of catalytic chemistry, molybdates are an important class of catalytic materials in the petrochemical industry. Among them, iron molybdate has been widely used in the production of industrial catalysts in the current selective oxidation of methanol to formaldehyde. There are two main methods for its synthesis: co-precipitation method and solid-phase reaction method. Industrial catalysts are generally prepared by co-precipitation method, and the preparation conditions have a great influence on the performance of the catal...

Claims

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Application Information

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IPC IPC(8): C01G39/00B82Y30/00
Inventor 丁维平郭学锋王立王仰东吕晓渊
Owner CHINA PETROLEUM & CHEM CORP
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