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A kind of preparation method of tantalum oxyfluoride nanosheet

A technology of nanosheets and nanopowders, applied in chemical instruments and methods, inorganic chemistry, tantalum compounds, etc., can solve the problems of less synthesis research, powders that cannot be used in photocatalysis and electrocatalysis, low specific surface area, etc., and achieve purity high effect

Active Publication Date: 2022-05-20
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on TaO 2 There are very few synthetic studies of F, Frevel and Rinn in the paper "The crystal structure of NbO 2 Fand TaO 2 In F”, dissolve metal tantalum powder in a Pt crucible filled with concentrated hydrofluoric acid, then slowly evaporate to dryness at 80°C, and calcinate the obtained white powder at 250°C in an air atmosphere for 1 hour to obtain TaO 2 F powder, but prepared TaO 2 F particle size is large and highly aggregated
TaO with large particle size and low specific surface area 2 F powder cannot be used in the field of photocatalysis and electrocatalysis

Method used

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  • A kind of preparation method of tantalum oxyfluoride nanosheet
  • A kind of preparation method of tantalum oxyfluoride nanosheet
  • A kind of preparation method of tantalum oxyfluoride nanosheet

Examples

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Embodiment 1

[0026] TaO is prepared in this embodiment 2 The method of F nanosheets is as follows: (NH4) prepared by hydrothermal method 2 Ta 2 O 3 F 6 Nanomaterials are used as precursors. In an air atmosphere (containing oxygen), the temperature rises to 400°C at a heating rate of 5°C / min and holds for 3 hours. After cooling in the furnace, TaO is obtained. 2 F nanosheets.

[0027] (NH4) used in this example 2 Ta 2 O 3 F 6 The preparation method of the precursor is as follows:

[0028] Metal tantalum powder, 40% hydrofluoric acid, analytically pure acetic acid, urea and deionized water are used as raw materials. The steps are as follows: (1) mix hydrofluoric acid and metal tantalum powder with a molar ratio of (3-12): 1, and fully stir until the metal tantalum powder is dissolved; (2) mix deionized water and glacial acetic acid according to the volume ratio ( 0.17~6): 1 Mix evenly; gradually drop the acetic acid solution into the mixed solution obtained in step (1) to obtain a ...

Embodiment 2

[0032] The difference between this example and Example 1 is that (NH4) will be prepared by hydrothermal method 2 Ta 2 O 3 F 6 The nano-powder is used as a precursor; in an air atmosphere (containing oxygen), the temperature is raised to 500 °C at a heating rate of 5 °C / min for 3 hours. TaO can be obtained 2 F nanosheets. Others are the same as in Example 1.

[0033] The prepared TaO 2 The X-ray diffraction phase analysis (XRD) of the F powder was carried out, and the XRD spectrum obtained by the test is as follows image 3 shown. The corresponding diffraction card is PDF-01-076-2370, there is no other impurity phase in this pattern, and the intensity of the XRD peak is high. Description of TaO obtained after heat treatment 2 F has good crystallinity and is a single-phase, high-purity, almost no impurity phase.

[0034] Figure 4 for the prepared TaO 2 Typical Scanning Electron Microscopy (SEM) image of the F sample showing the TaO formed 2 The F powder has a nano-...

Embodiment 3

[0036] The difference between this example and Example 1 is that (NH4) will be prepared by hydrothermal method 2 Ta 2 O 3 F 6 The nano-powder is used as a precursor; in an air atmosphere (containing oxygen), the temperature is raised to 350°C at a heating rate of 1°C / min and kept for 5 hours. TaO can be obtained 2 F nanosheets. Others are the same as in Example 1.

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Abstract

The invention provides a TaO 2 The preparation technology of F nanosheet belongs to the technical field of nanomaterial preparation; specifically relates to (NH4) 2 Ta 2 o 3 f 6 Heat treatment method as a precursor. It is characterized in that: the (NH 4 ) 2 Ta 2 o 3 f 6 Nano-powder as a precursor; (1) in an air (containing oxygen) atmosphere, raise the temperature to 350-500°C at a rate of 1-100°C / min, and keep it warm for 0.5-5 hours; or (2) in argon Under the atmosphere (inert oxygen-free atmosphere), increase the temperature to 350-700°C at a rate of 1-10°C / min, and keep it warm for 0.5-5 hours to obtain TaO 2 F nanosheets; have great application potential in the field of photocatalysis and electrocatalysis.

Description

technical field [0001] The present invention relates to a kind of TaO 2 The preparation method of F nanosheet belongs to the technical field of nanomaterial preparation, and specifically relates to a heat treatment method of a precursor. Background technique [0002] With the rapid development of social economy, environmental pollution and energy shortage have become two major problems to be solved in the world, prompting people to seek and utilize low-cost, high-efficiency and environmentally friendly sustainable energy conversion technologies. In order to solve the problem of increasing energy consumption and environmental pollution, the development of renewable resources such as clean water energy and solar energy has attracted the attention of mankind. Among them, electrolysis of water is considered to be one of the most effective methods for large-scale hydrogen production. The noble metals platinum and ruthenium oxide are currently the most efficient electrocatalysts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G35/00B01J27/12
CPCC01G35/00B01J27/12C01P2004/20B01J35/33B01J35/39
Inventor 李俐耿欣温广武邱鹏程杨玉茹
Owner SHANDONG UNIV OF TECH