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

Ink and its preparation method and gas sensor thin film

An ink and ethanol aqueous solution technology, applied in ink, home appliances, applications, etc., can solve the problems of inability to measure the relative size of Marangoni flow and capillary flow, weaken the trend of coffee ring, and complicated operation, so as to inhibit the migration of solute and avoid Coffee ring effect, the effect of increasing the contact area

Active Publication Date: 2022-04-19
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the addition of various solvents can only weaken the tendency of coffee ring formation, and the relative size of Marangoni flow and capillary flow cannot be measured, and the regulation of the drying process has a certain blindness, and by adding and adjusting the solvent The operation of proportioning to suppress the coffee ring phenomenon is complicated and the efficiency is low

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
  • Ink and its preparation method and gas sensor thin film
  • Ink and its preparation method and gas sensor thin film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] Another embodiment of the present invention provides a method for preparing ink, comprising the following steps S1-S3:

[0051] S1, providing anisotropic α-Fe 2 o 3 nanoparticles.

[0052] In one embodiment, the preparation of anisotropic α-Fe 2 o 3 The steps of nanoparticles are: Fe(ClO 4 ) 3 The solution was added to dihydrogen phosphate and CO(NH 2 ) 2 (urea) in a mixed aqueous solution, mix well, react hydrothermally at 100°C to 160°C, separate the solid, wash and dry to obtain anisotropic α-Fe 2 o 3nanoparticles.

[0053] In one embodiment, the dihydrogen phosphate is KH 2 PO 4 or NaH 2 PO 4 .

[0054] In one embodiment, Fe(ClO 4 ) 3 The concentration of the solution is 0.05mol / L-0.2mol / L.

[0055] In one embodiment, dihydrogen phosphate and Fe(ClO 4 ) 3 The molar ratio of (0.02~0.06):1; CO(NH 2 ) 2 with Fe(ClO 4 ) 3 The molar ratio is (1~1.5):1.

[0056] In this way, by controlling the amount of raw materials used in the reaction process, h...

Embodiment 1

[0076] (1) Ellipsoid α-Fe 2 o 3 Preparation of nanoparticles

[0077] ① Fe(ClO 4 ) 3 Add to NaH 2 PO 4 , CO(NH 2 ) 2 In the mixed aqueous solution, mix and stir for 30 minutes, so that the phases of the system are evenly mixed. Subsequently, the above-mentioned precursor yellow solution was transferred to a hydrothermal reaction kettle, kept in an oven at 100° C. for 24 h, and then naturally cooled to room temperature to obtain a red mixture. Among them, Fe(ClO 4 ) 3 0.1mol / L, NaH 2 PO 4 with Fe(ClO 4 ) 3 The molar ratio of CO(NH 2 ) 2with Fe(ClO 4 ) 3 The molar ratio is 1.2:1.

[0078] ②The obtained red substance was centrifuged, washed 3 times with absolute ethanol, and dried at 40°C for 12 hours to obtain ellipsoidal α-Fe with high purity and good dispersibility. 2 o 3 nanoparticles.

[0079] (2) Mesoporous α-Fe 2 o 3 @m-SnO 2 Colloidal particle preparation

[0080] 0.1gα-Fe 2 o 3 Disperse in 90mL ethanol solution (volume fraction of absolute etha...

Embodiment 2

[0088] (1) Ellipsoid α-Fe 2 o 3 Preparation of nanoparticles

[0089] ① Fe(ClO 4 ) 3 Added to KaH 2 PO 4 , CO(NH 2 ) 2 In the mixed aqueous solution, mix and stir for 45 minutes, so that all phases of the system are mixed evenly. Subsequently, the above-mentioned precursor yellow solution was transferred to a hydrothermal reaction kettle, kept in an oven at 160° C. for 4 h, and then naturally cooled to room temperature to obtain a red mixture. Among them, Fe(ClO 4 ) 3 0.1mol / L, KaH 2 PO 4 with Fe(ClO 4 ) 3 The molar ratio is 0.06:1, CO(NH 2 ) 2 with Fe(ClO 4 ) 3 The molar ratio is 1.5:1

[0090] ② The obtained red substance was centrifuged and washed 3 times with absolute ethanol. The resulting material was dried at 60°C for 1 h.

[0091] (2) Mesoporous α-Fe 2 o 3 @m-SnO 2 Colloidal particle preparation

[0092] 0.1gα-Fe 2 o 3 Disperse in 90mL ethanol solution (volume fraction of absolute ethanol: 50vol%) and ultrasonically disperse for 30min; 1.5g ur...

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

No PUM Login to View More

Abstract

The invention relates to an ink, a preparation method thereof and a gas sensor film. Wherein, the preparation method of described ink comprises the following steps: providing anisotropic α-Fe 2 o 3 Nanoparticles; in the α-Fe 2 o 3 The surface of nanoparticles forms SnO with mesoporous structure 2 shell, resulting in α-Fe with a core-shell structure 2 o 3 / SnO 2 Nanocomposite particles; the α-Fe with core-shell structure 2 o 3 / SnO 2 The nanocomposite particles are dispersed in water to obtain a dispersion liquid, and then a solvent is added and mixed uniformly to obtain the ink. The ink prepared by the method is uniform and stable, and is suitable for inkjet printing. The ink combines two gas-sensitive materials into one body, can suppress the coffee ring effect, and improves the uniformity and sensitivity of the gas-sensitive sensor film.

Description

technical field [0001] The invention relates to the technical field of gas sensor manufacturing, in particular to an ink, a preparation method thereof and a gas sensor film. Background technique [0002] Semiconductor gas sensors mainly use transition metal oxide semiconductor materials as gas sensing materials. SnO commonly used as gas sensing material 2 (SnO2) gas-sensitive film has the advantages of responding to many gases and has a wide detection range, but it also has the disadvantages of low selectivity and weak working stability. α-Fe 2 o 3 (α-phase ferric oxide, commonly known as hematite) is a typical n-type (electron depletion layer) semiconductor, which has the advantages of good optical band gap, corrosion resistance, environmental friendliness, and easy synthesis and preparation. It is widely used in photoelectrochemical, gas sensor and other fields, but it has the disadvantage of poor sensitivity. [0003] Inkjet printing has excellent characteristics suc...

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): C09D11/38C09D11/36C09D11/30
CPCC09D11/38C09D11/36C09D11/30
Inventor 韩平唐卫东杨曦
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com