Room-temperature high-selectivity NO2 sensor based on three-dimensional Ti3C2Tx/rGO composite folded ball and preparation method thereof

A high-selectivity, sensor technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve problems such as stay

Inactive Publication Date: 2021-12-24
JILIN UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of surface defects caused by oxidation are the main reason for the improvement of gas sensor response, but the improvement of gas sensor performance only stays at the response value, and there is still a lot of room for improvement in selectivity, response recovery efficiency, etc.

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
  • Room-temperature high-selectivity NO2 sensor based on three-dimensional Ti3C2Tx/rGO composite folded ball and preparation method thereof
  • Room-temperature high-selectivity NO2 sensor based on three-dimensional Ti3C2Tx/rGO composite folded ball and preparation method thereof
  • Room-temperature high-selectivity NO2 sensor based on three-dimensional Ti3C2Tx/rGO composite folded ball and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of 3D Ti by Ultrasonic Spray Pyrolysis 3 C 2 T x / rGO composite wrinkled ball type 4 was used as the sensitive material, and the PI film with Au interdigitated electrodes was used as the substrate to fabricate a nitrogen dioxide sensor at room temperature, and the gas-sensing performance of the sensor was tested. The specific process is as follows:

[0053] (1) Weigh Ti 3 AlC 2 The powder is slowly added to the etching solution formed by mixing concentrated hydrochloric acid (mass fraction 35%) and lithium fluoride, Ti 3 AlC 2 The mass ratio of powder to lithium fluoride is 1:1, Ti 3 AlC 2 The mass volume ratio of powder to concentrated hydrochloric acid is 1g: 50mL; stir and react in a water bath at 40°C for 24 hours, and the product after the reaction is washed and centrifuged repeatedly with deionized water until the pH of the supernatant is 6; then the washed The product was dispersed in 60mL of deionized water, and after ultrasonic dispersion for...

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
widthaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a room-temperature high-selectivity NO2 sensor based on a three-dimensional Ti3C2Tx / rGO composite folded ball and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor is composed of a polyimide substrate with an Au interdigital electrode and sensitive electrodes prepared on the interdigital electrode and the substrate. The three-dimensional Ti3C2Tx / rGO composite folded ball is synthesized by adopting an ultrasonic spray pyrolysis technology, and on the basis of forming an anti-aggregation pleated ball to reduce the loss of the specific surface area, a uniform rGO / TiO2 heterojunction is also formed on the folded ball, so that sensing sites are increased. The material shows the property of a p-type semiconductor, and the response direction of NO2 is opposite to that of VOCs and NH3, so that the selectivity of NO2 is further enhanced undoubtedly. Meanwhile, the three-dimensional Ti3C2Tx / rGO composite folded ball has higher NO2 response and lower detection limit compared with a pure Ti3C2Txfolded ball and a pure rGO folded ball.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a sensor based on three-dimensional Ti 3 C 2 T x / rGO composite wrinkled spheres with high selectivity for NO at room temperature 2 Sensor and preparation method, the sensor is based on three-dimensional Ti 3 C 2 T x / rGO composite wrinkle ball is a sensitive layer, mainly used for wearable nitrogen dioxide detection. Background technique [0002] MXenes refers to the family of two-dimensional transition metal carbides, nitrides and carbonitrides, the name comes from its preparation process and properties ("Two-Dimensional Nanocrystals Produced by Exfoliation of Ti 3 AlC 2 ", Michael Naguib et al., Advanced Materials, Volume 23, Issue 37, Pages 4248-4253, August 22, 2011). MXenes have the general formula M n+1 x n T z , T means such as O 2- , OH - , F - and Cl - surface group (M represents a transition metal element, X represents carbon or nitrogen). At present...

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 Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 刘方猛杨子杰段羽卢革宇
Owner JILIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap