Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A preparation method of flower-shaped cuo microspheres and its application in formaldehyde gas sensor

A microsphere and flower-like technology, which is applied in the field of CuO microsphere preparation, can solve the problems of large-scale application and expensive detection equipment, and achieve good response-recovery characteristics and selectivity, good crystallization, and broad application prospects.

Active Publication Date: 2019-03-15
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common detection method for volatile organic compounds is an off-line detection method using solid-state extraction and gas chromatography combined analysis with reference to national standards, which has high technical requirements for operators, and the detection equipment is expensive and cannot be applied on a large scale

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A preparation method of flower-shaped cuo microspheres and its application in formaldehyde gas sensor
  • A preparation method of flower-shaped cuo microspheres and its application in formaldehyde gas sensor
  • A preparation method of flower-shaped cuo microspheres and its application in formaldehyde gas sensor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] (1) The preparation method of the flower-shaped CuO microspheres comprises the following steps:

[0034] Step 1: A certain amount of Cu(NO 3 ) 2 •3H 2 O, urea, and PEG20000 were dissolved in 80 mL of deionized water. Stir magnetically at room temperature for 30 minutes, and prepare a hydrothermal synthesis precursor reaction solution.

[0035] Step 2: Transfer the precursor reaction solution prepared in Step 1 into a polytetrafluoroethylene-lined stainless steel autoclave with a filling degree of 80% and seal it. Keep the temperature at 120-200°C for 12 hours, then cool down to room temperature with the furnace to obtain the reaction product.

[0036] Step 3: The reaction product obtained in Step 2 is centrifuged, washed repeatedly with distilled water and absolute ethanol, and then dried.

[0037] Step 4: Put the dried product in Step 3 into a muffle furnace and calcinate at 400° C. for 3 hours to obtain flower-shaped CuO microspheres.

[0038] (2) The steps of p...

Embodiment 1

[0044] (1) Preparation of flower-like CuO microspheres:

[0045] Step 1: 0.483 g Cu(NO 3 ) 2 ·3H 2 O, 0.36 g of urea, and 1.784 g of PEG20000 were dissolved in 80 mL of deionized water, and magnetically stirred at room temperature for 30 minutes to prepare a reaction solution of the precursor for hydrothermal synthesis.

[0046] Step 2: Transfer the precursor reaction solution prepared in Step 1 into a polytetrafluoroethylene-lined stainless steel autoclave with a filling degree of 80%, and seal it.

[0047] Step 3: Place the reaction kettle in Step 2 in an oven, keep it warm at 180° C. for 12 hours, and then cool it down.

[0048] Step 4: Centrifuge the reactant solution prepared in Step 3 to obtain a black precipitate, which is then repeatedly washed with distilled water and absolute ethanol.

[0049] Step 5: Place the product of Step 4 in a drying oven at a constant temperature at 80° C. for 24 hours for drying.

[0050] Step 6: Put the dried product in step 5 into a c...

Embodiment 2

[0055] (1) Preparation of flower-like CuO microspheres:

[0056] Step one, two are with embodiment 1.

[0057] Step 3: Place the reaction kettle in Step 2 in an oven, keep it warm at 120° C. for 12 hours, and then cool it down.

[0058] Steps 4, 5 and 6 are the same as in Example 1.

[0059] (2) Structural characterization of flower-like CuO microspheres

[0060] The morphology of the product was characterized by scanning electron microscopy. Such as image 3 As shown in (a), the product is a bulk material composed of nanoblocks.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A method for preparing flower-shaped CuO microspheres and its application in formaldehyde gas sensors, relating to the preparation of flower-shaped CuO microspheres and their application in gas sensors. The present invention uses Cu(NO 3 ) 2 ·3H 2 O was the copper source, urea and PEG20000 were the auxiliary additives, and the flower-like CuO microspheres assembled by nanostrips were obtained by hydrothermal reaction. The advantage of this preparation method is that the whole production process is simple and easy, the product has high purity and low cost, and is suitable for large-scale industrial production. The flower-like CuO microspheres prepared by the present invention have a unique spatial structure, which not only increases the specific surface area of ​​the material, but also builds well-developed hierarchical pore channels, which is conducive to the rapid adsorption and desorption of formaldehyde gas molecules, so that the sensor exhibits better performance. High sensitivity, good response-recovery characteristics and selectivity have broad application prospects in the manufacture of gas sensors.

Description

technical field [0001] The invention relates to a method for preparing CuO microspheres and its application in gas sensors, in particular to a method for preparing flower-shaped CuO microspheres and its application in formaldehyde gas sensors. Background technique [0002] Copper oxide (CuO) is a typical P-type narrow-band semiconductor material with a forbidden band width of 1.2eV. Because CuO has unique electrical, magnetic, and catalytic properties, it can be used as a multifunctional inorganic material with a wide range of uses: it has a wide range of applications in the fields of gas sensing, magnetic phase conversion, superconductivity, and catalysis. With the development of nanomaterial science and technology becoming more and more mature, nanotechnology has been applied to the preparation of CuO nanomaterials with better performance. Compared with conventional size CuO, nanoscale CuO material exhibits some unique properties, such as small size effect and quantum tun...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/02G01N33/00
CPCC01G3/02C01P2002/72C01P2004/03C01P2004/32C01P2004/61G01N33/0047
Inventor 孟丹张硕彭耀嘉牛文雪
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products