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

High-sensitivity gas detection material and preparation method thereof

A gas detection and sensitive technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc. Sensitivity and responsiveness, improved dispersibility, effect of increased dispersibility

Inactive Publication Date: 2020-08-14
莱西市星脉先进材料技术中心
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a graphene / metal oxide / metal sulfide highly sensitive gas detection material, which overcomes the problems of long response recovery time, poor stability and short life of gas sensors prepared by traditional single metal oxide semiconductors, and at the same time In the preparation process, by adding a composite modifier, the technical problem that the dispersion of nanomaterials is easy to agglomerate is solved, so that the gas sensor made of this ternary composite gas detection material has better sensitivity and responsiveness for gas detection.

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
  • High-sensitivity gas detection material and preparation method thereof
  • High-sensitivity gas detection material and preparation method thereof
  • High-sensitivity gas detection material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: A kind of highly sensitive gas detection material, is made of graphene / metal oxide / metal sulfide, is characterized in that: metal sulfide is CdS, metal oxide is TiO 2 , the specific preparation steps of the composite gas detection material include:

[0029] Step A: Utilize improved Hummer method to prepare graphene oxide and configure graphene oxide solution; Step B: prepare CdS nanowire material; Step C: graphene and TiO 2 Recombination of quantum wires; Step D: Graphene / TiO 2 / CdS ternary composite gas detection material film preparation.

[0030] Step A is specifically: heat the graphene oxide prepared by the Hummer method in an oven at 200° C. for 2 hours to partially reduce the prepared graphene oxide, put 30 mg of graphene oxide in a small beaker and add 20 ml of no Water and ethanol were ultrasonically oscillated, and 8ml of concentrated HCL and 3ml of distilled water were added to continue oscillating for 3 hours to form a graphene oxide solution...

Embodiment 2

[0040] Embodiment 2: A kind of highly sensitive gas detection material, is made of graphene / metal oxide / metal sulfide, is characterized in that: metal sulfide is CdS, metal oxide is TiO 2 , the specific preparation steps of the composite gas detection material include:

[0041] Step A: Utilize improved Hummer method to prepare graphene oxide and configure graphene oxide solution; Step B: prepare CdS nanowire material; Step C: graphene and TiO 2 Recombination of quantum wires; Step D: Graphene / TiO 2 / CdS ternary composite gas detection material film preparation.

[0042] Step A is specifically: heat the graphene oxide prepared by the Hummer method in an oven at 200° C. for 2 hours to partially reduce the prepared graphene oxide, put 30 mg of graphene oxide in a small beaker and add 20 ml of no Water and ethanol were ultrasonically oscillated, and 8ml of concentrated HCL and 3ml of distilled water were added to continue oscillating for 3 hours to form a graphene oxide solution...

Embodiment 3

[0049] Embodiment 3: a kind of highly sensitive gas detection material, is made of graphene / metal oxide / metal sulfide, is characterized in that: metal sulfide is CdS, metal oxide is TiO 2 , the specific preparation steps of the composite gas detection material include:

[0050] Step A: Utilize improved Hummer method to prepare graphene oxide and configure graphene oxide solution; Step B: prepare CdS nanowire material; Step C: graphene and TiO 2 Recombination of quantum wires; Step D: Graphene / TiO 2 / CdS ternary composite gas detection material film preparation.

[0051] Step A is specifically: heat the graphene oxide prepared by the Hummer method in an oven at 200° C. for 2 hours to partially reduce the prepared graphene oxide, put 30 mg of graphene oxide in a small beaker and add 20 ml of no Water and ethanol were ultrasonically oscillated, and 8ml of concentrated HCL and 3ml of distilled water were added to continue oscillating for 3 hours to form a graphene oxide solution...

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 a graphene / metal oxide / metal sulfide high-sensitivity gas detection material and a preparation method thereof. The graphene / TiO2 / CdS ternary composite gas detection material is prepared through a series of processes. The characteristics of quick response time, reflected by metal sulfide in the aspect of gas detection and good dispersity of metal oxide nanoparticles and large surface area of graphene are utilized, and the problems of poor responsivity, poor stability and short service life of a gas sensor prepared from a traditional single metal oxide semiconductor aresolved synergistic action of the metal sulfide, the metal oxide nanoparticles and the graphene; and the TiO2 nanoparticles have favorable dispersity by adding the composite modifier so that the gas detection element prepared from the ternary composite gas detection material has higher sensitivity and better selectivity and stability for gas detection.

Description

technical field [0001] The invention belongs to the technical field of gas detection material preparation technology, and in particular relates to a preparation method of a highly sensitive gas detection material whose sensitivity, responsiveness and selectivity are superior to general gas detection materials. Background technique [0002] Gas detection material is a kind of functional material. When this material encounters a specific gas, its physical and chemical properties will change with the type and concentration of the external gas under certain conditions. According to this, its As a gas sensor sensing device. Foreign countries began to study gas detection materials in the 1930s. At present, with the increasing requirements of modern society for the detection, control and alarm of flammable, explosive, toxic and harmful gases, the development of gas detection materials Performance and types have been developed to a certain extent. Metal oxide semiconductors are th...

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
IPC IPC(8): C01G23/047C01B32/184C01G11/02B82Y40/00B82Y30/00C01B32/198
CPCB82Y30/00B82Y40/00C01B32/184C01B32/198C01G11/02C01G23/047C01P2004/03C01P2004/80
Inventor 李军
Owner 莱西市星脉先进材料技术中心