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Method for preparing molybdenum trioxide material with orthorhombic phase single crystal nano belt structure

A technology of single crystal nanometer and molybdenum trioxide, which is applied in the field of inorganic non-metallic nanomaterials and nanometers, which can solve the problems of safety and difficult control of acidification operation, expensive preparation equipment, high reaction temperature, etc., and achieve easy control of process and simple preparation equipment , the effect of low reaction temperature

Inactive Publication Date: 2011-08-03
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing an orthorhombic single crystal nanoribbon structure molybdenum trioxide material, which solves the problems of expensive preparation equipment, high reaction temperature, strict process control requirements and low yield in the existing thermal evaporation method. High energy consumption; the safety of the hydrothermal method and the problem that the acidification operation is not easy to control

Method used

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  • Method for preparing molybdenum trioxide material with orthorhombic phase single crystal nano belt structure
  • Method for preparing molybdenum trioxide material with orthorhombic phase single crystal nano belt structure
  • Method for preparing molybdenum trioxide material with orthorhombic phase single crystal nano belt structure

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Embodiment 1

[0031] Dissolve ammonium heptamolybdate in deionized water after grinding to obtain a concentration of 20g / 100ml ammonium heptamolybdate solution and age for 2 days, then add the same volume of deionized water; acidify the above solution with nitric acid while stirring, The concentration of nitric acid is 3mol / L, and the addition is 1 time of the ammonium heptamolybdate solution, and the stirring is continued for 30min to obtain a transparent molybdic acid sol; the ethanol solution of template agent CTAB is added to the molybdic acid sol, and the CTAB concentration is 2mol / L, The amount added is 0.1 times the volume of the sol, and stirred vigorously for 1 hour;

[0032]Move the molybdic acid sol containing the template agent into a polytetrafluoroethylene-lined stainless steel reactor, conduct a hydrothermal reaction at 120°C for 36 hours, cool to room temperature, and obtain a hydrothermal product; filter the obtained hydrothermal reaction product, first Wash with absolute e...

Embodiment 2

[0035] Dissolve ammonium heptamolybdate in deionized water after grinding to obtain a concentration range of 50g / 100ml ammonium heptamolybdate solution and age for 8 days, then add the same volume of deionized water; acidify the above solution with nitric acid while stirring , the concentration of nitric acid is 7mol / L, the addition is 3 times of the ammonium heptamolybdate solution, and the stirring is continued for 90min to obtain a transparent molybdic acid sol; the ethanol solution of template agent CTAB is added to the molybdic acid sol, and the CTAB concentration is 5mol / L , the amount added is 0.5 times the volume of the sol, and vigorously stirred for 5 hours;

[0036] Move the molybdic acid sol containing the template agent into a polytetrafluoroethylene-lined stainless steel reaction kettle, conduct a hydrothermal reaction at 180°C for 12 hours, cool to room temperature, and obtain a hydrothermal product; filter the obtained hydrothermal reaction product, first Wash ...

Embodiment 3

[0038] Dissolve ammonium heptamolybdate in deionized water after grinding to obtain a concentration range of 40g / 100ml ammonium heptamolybdate solution and age for 6 days, then add the same volume of deionized water; acidify the above solution with nitric acid while stirring , the nitric acid concentration is 5mol / L, the addition is 2 times of the ammonium heptamolybdate solution, and the stirring is continued for 60min to obtain a transparent molybdic acid sol; the ethanol solution of the template agent CTAB is added to the molybdic acid sol, and the CTAB concentration is 4mol / L , the amount added is 0.4 times the volume of the sol, and vigorously stirred for 4 hours;

[0039] Move the molybdic acid sol containing the template agent into a polytetrafluoroethylene-lined stainless steel reaction kettle, conduct a hydrothermal reaction at 150°C for 24 hours, cool to room temperature, and obtain a hydrothermal product; filter the obtained hydrothermal reaction product, first Wash...

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Abstract

The invention discloses a method for preparing a molybdenum trioxide material with an orthorhombic phase single crystal nano belt structure. The method comprises the following steps: preparing molybdenum acid sol from ammonium heptamolybdate acidified by nitric acid; adding a template agent cetyltrimethylammonium bromide; and carrying out hydrothermal reaction, filtering, washing and drying so as to obtain the orthorhombic phase single crystal nano belt. In the method for preparing the molybdenum trioxide material with the orthorhombic phase single crystal nano belt structure, the ammonium heptamolybdate and the nitric acid are used as raw materials, the cetyltrimethylammonium bromide is used as the template agent, the acidification procedure is simple, process is easy to control, the reaction temperature is low, and the width and thickness of the product are small; the nano belt is of a single crystal structure and has good topography; and the preparation process is short in process flow period, the yield is high, the preparation equipment is simple and the cost is low. By using the method, the molybdenum trioxide material with the orthorhombic phase single crystal nano belt structure, which has width of 50-100nm, length of 1-10 mu m and thickness of 30-60nm, is obtained, and the powder grain size of the molybdenum trioxide nano belt is even.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic nanomaterials and nanotechnology, and relates to a method for preparing a molybdenum trioxide material, in particular to a method for preparing a molybdenum trioxide material with an orthogonal phase single crystal nanobelt structure. Background technique [0002] Orthorhombic MoO 3 Nanomaterials (α-MoO 3 ), which belongs to wide bandgap semiconductor (Eg=3.05eV), is caused by distortion [MoO 6 ] The octahedrons are connected with common edges in one direction, and connected with common vertices in the other direction to form a two-dimensional infinitely stretched plane layer, and the layers are combined by weak van der Waals force. Orthorhombic MoO 3 Nanobelts have remarkable field emission performance, photoluminescence performance, photochromic performance, electrochromic performance, reversible photochromic performance, gas sensitivity performance, flame retardancy and smoke suppressio...

Claims

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Application Information

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IPC IPC(8): C01G39/02B82Y40/00
Inventor 高宾张晓军
Owner XI'AN POLYTECHNIC UNIVERSITY
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