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

A kind of preparation method of bismuth vanadate-polyacid gas sensing nanocomposite material

A nanocomposite material and gas sensing technology, which is applied in the field of preparation of bismuth vanadate-polyacid gas sensing nanocomposite materials, can solve problems such as affecting electron transmission, poor performance, and weakening of gas sensing detection signals

Inactive Publication Date: 2019-08-02
NORTHEAST NORMAL UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. In the bismuth vanadate material, after the electrons transition to the conduction band, the electrons and holes are easy to recombine, which affects the transmission of electrons and leads to the weakening of the gas sensing detection signal
[0005] 2. The bismuth vanadate gas sensors that have been published so far often have gas-sensing performance only under high temperature conditions, but their performance is poor at room temperature, which is not conducive to real-time monitoring of the measured gas

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 kind of preparation method of bismuth vanadate-polyacid gas sensing nanocomposite material
  • A kind of preparation method of bismuth vanadate-polyacid gas sensing nanocomposite material
  • A kind of preparation method of bismuth vanadate-polyacid gas sensing nanocomposite material

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0030] Put the interdigitated electrode with the composite film into the sealed quartz reaction container for testing, one of the gold electrodes of the interdigitated electrode is connected to the working electrode of the electrochemical workstation with a wire, the other gold electrode and the counter electrode and the reference The electrodes are connected. A voltage of 0.1V was applied between the two electrodes, and a stable photocurrent value was obtained under the irradiation of a xenon lamp. When injecting 5ppm, 10ppm, 20ppm, 30ppm and 50ppm nitrogen dioxide gas into the quartz reaction vessel, the current between the two electrodes increases obviously. (see attached Image 6 ).

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 provides a method for preparing a bismuth vanadate-polyacid gas sensing composite nano-material. A prepared polyacid modified bismuth vanadate nano-rod composite gas sensitive material can be used in a photoelectric gas sensor. The gas sensitive material is a bismuth vanadate-polyacid composite nano-material which is formed by using a bismuth vanadate nano-rod as a main body and modifying with Keggin-type phosphotungstic acid. In a room temperature environment, under irradiation of a xenon lamp, the sensor has a remarkable sensing detection function for toxic nitrogen dioxide gas. The method for preparing the bismuth vanadate-polyacid gas sensing composite nano-material is simple, has low cost, can be used for effectively detecting low-concentration nitrogen dioxide gas in the air at room temperature, and is applicable to development and production of a novel high-performance gas sensor.

Description

[0001] Inventor: Xu Lin Zhang Qian technical field [0002] The invention belongs to the technical field of gas sensors, and relates to a preparation method of a bismuth vanadate-polyacid gas sensing nanocomposite material. Background technique [0003] A gas sensor refers to a device or device that converts the measured gas concentration into an electrical output that has a certain relationship with it. It uses the physical and chemical properties of various gases to convert the changes of the monitored gases in the environment into easy-to-handle electrical signals, so that people can control and apply them correctly and effectively. It is the primary link to realize automatic detection and automatic control. Bismuth vanadate is a new type of high-efficiency semiconductor photoelectric functional material. Because of its visible light absorption capacity, stable chemical properties, low price, and environmental protection, it is important in solar cells and photocatalytic...

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): G01N27/30C01G31/00C01G41/00B82Y30/00B82Y15/00
CPCB82Y15/00B82Y30/00C01G31/00C01G41/00C01P2002/72C01P2002/82C01P2004/03C01P2004/12C01P2004/52C01P2004/61C01P2004/80G01N27/305
Inventor 许林张倩
Owner NORTHEAST NORMAL UNIVERSITY