Unlock instant, AI-driven research and patent intelligence for your innovation.

Porous zinc oxide sensor, preparation method and application

A sensor and porous structure technology, applied in the field of quantitative analysis of nanoporous materials, can solve the problems of slow response at room temperature, the sensitivity of the sensor to putrescine and cadaverine needs to be improved, and limit the mass production and use of sensors, so as to achieve good processability and excellent The effect of selective, simple method

Active Publication Date: 2022-05-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shi Yi's team developed a polyaniline sensor for room temperature to 5ppmNH 3 , putrescine and cadaverine have responses of 225%, 47% and 16% respectively, and can have obvious detection effects on actual beef, chicken and fish, but there are still slow response at room temperature, and the sensor is sensitive to putrescine cadaverine. The sensitivity of amine needs to be improved; Yang Ping group prepared C-N / SnO 2 / ZnO / Au material for the sensitive detection of triethylamine (5ppm, R a / R g =14), the response recovers quickly (~10s), and the linear curve of the actual fish concentration within seven days is good, but the application of precious metal gold limits the mass production and use of this type of sensor

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
  • Porous zinc oxide sensor, preparation method and application
  • Porous zinc oxide sensor, preparation method and application
  • Porous zinc oxide sensor, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085]Optimum working temperature test of the sensor: Weigh 3mg of porous zinc oxide solid sample into a 3mL centrifuge tube, add 1mL of absolute ethanol, and sonicate for 20min. Take 20 μL of the suspension with a pipette gun, evenly drop-coat it on the ceramic tube, and dry it in an oven at 50°C for 30 minutes. Connect the prepared sensor to a multimeter and fix it in an 18L airtight cavity. Adjust the heating power of the DC power supply to make the sensor perform sensing test at a certain temperature (80-400°C). Take 1.37uL putrescine each time with a micro-injector, the heating power of the external power supply is 15W, and the heating time is 1.5min, so that the concentration of putrescine in the final cavity is 10ppm. After turning off the heating power supply, time 2min as the response time, and record the resistance change of the multimeter. After the reaction is over, open the lid of the chamber, make the sensor contact with fresh air, the resistance rises, and rec...

Embodiment 2

[0087] Repeatability test of the sensor: Weigh 3mg of porous zinc oxide solid sample into a 3mL centrifuge tube, add 1mL of absolute ethanol, and sonicate for 20min. Take 20 μL of the suspension with a pipette gun, evenly drop-coat it on the ceramic tube, and dry it in an oven at 50°C for 30 minutes. Connect the prepared sensor to a multimeter and fix it in an 18L airtight cavity. Adjust the heating power of the DC power supply so that the sensor is tested at 150 °C. Take 1.37 μL putrescine each time with a micro-injector, and the heating power of the external power supply is 15W, and the heating time is 1.5min, so that the final concentration of triethylamine in the cavity is 10ppm. After turning off the heating power supply, time 2min as the response time, and record the resistance change of the multimeter. After the reaction is over, open the lid of the chamber, make the sensor contact with fresh air, the resistance rises, and record the time required for the resistance t...

Embodiment 3

[0089] Concentration test of putrescine by the sensor: Weigh 3mg of porous zinc oxide solid sample into a 3mL centrifuge tube, add 1mL of absolute ethanol, and sonicate for 20min. Take 20 μL of the suspension with a pipette gun, evenly drop-coat it on the ceramic tube, and dry it in an oven at 50°C for 30 minutes. Connect the prepared sensor to a multimeter and fix it in an 18L airtight cavity. Adjust the heating power of the DC power supply so that the sensor is tested at 150 °C. Take a certain amount of putrescine each time with a micro-injector, the heating power of the external power supply is 15W, and the heating time is 1.5min, so that the concentration of putrescine in the final cavity is 1-50ppm. After turning off the heating power supply, time 2min as the response time, and record the resistance change of the multimeter. After the reaction is over, open the lid of the chamber, make the sensor contact with fresh air, the resistance rises, and record the time required...

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a sensor, a preparation method and application of the sensor. The sensor comprises a ZnO nano material; the particle size is 1-20 [mu] m; the material has a porous structure; the material has mesopores, and the size of the mesopores is 2-50 nm; and the specific surface area is 10-200m < 2 > / g. The volatile salt-based total nitrogen sensor based on porous zinc oxide has the advantages of high sensitivity, high selectivity, strong repeatability and good stability, the power consumption of the sensor in the use process is greatly reduced, the use portability of the sensor is improved, and the volatile salt-based total nitrogen sensor based on porous zinc oxide has important practice and research values in the technical field.

Description

technical field [0001] The application relates to a porous zinc oxide sensor, a preparation method and an application, and belongs to the technical field of quantitative analysis methods for nanoporous materials. Background technique [0002] The issue of food safety has always been a hot spot for the government and society. In the process of food storage and transportation, food rot and decay are inevitable. Accompanied by decay and microbial metabolism, changes in the chemical composition of food can be caused, and a variety of spoilage products can be produced. Therefore, direct measurement of these spoilage products can be used as a basis for judging the quality of food. At present, the only physical and chemical index used to evaluate the freshness of meat in the national standard is total volatile basic nitrogen (TVBN), that is, basic nitrogen-containing substances such as ammonia and organic amines are produced during the decomposition of protein during the spoilage ...

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): G01N27/26G01N27/30
CPCG01N27/26G01N27/30Y02A50/20
Inventor 冯亮胡琪
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI