Hydrogen sulfide gas detection method based on nanosheet composite membrane and sensor

A gas sensor and nanosheet technology, applied in the field of chemical/biological sensing, can solve the problem that hydrogen sulfide gas sensing and detection has not been reported

Pending Publication Date: 2020-09-22
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However based on Au / SnO-SnO 2 The use of nanosheet composite membranes for the sensing and detection of hydrogen sulfide gas has not been reported

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
  • Hydrogen sulfide gas detection method based on nanosheet composite membrane and sensor
  • Hydrogen sulfide gas detection method based on nanosheet composite membrane and sensor
  • Hydrogen sulfide gas detection method based on nanosheet composite membrane and sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The water used in the examples is ultrapure water (resistivity ≥ 18.3 MΩ·cm).

[0042] 1. Experimental process

[0043] 1. Au / SnO-SnO 2 Preparation of nanosheet composites

[0044] Synthesis of Au / SnO-SnO by Hydrothermal Method 2 nanocomposites. 0.0008mol SnCl 2 2H 2 O and 0.0032mol urea were dissolved in 60mL deionized water, and stirred evenly to form a white turbid liquid. Add 108 μL of 24 mM chloroauric acid solution to the white turbid solution, and the white turbid solution turns into light pink turbid solution. Transfer the obtained light pink turbid liquid into a 100mL polytetrafluoroethylene autoclave, react at 180°C for 16h, centrifuge after cooling, wash with deionized water and absolute ethanol several times in sequence, and dry at 50°C for 24h. Gray black powder after grinding, Au / SnO-SnO 2 Nanosheets (Au / SnO-SnO 2 NS). As a comparison, SnO-SnO was prepared by the same method as above without adding chloroauric acid. 2 Nanosheets (SnO-SnO 2 NS)...

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
The inside diameter ofaaaaaaaaaa
Outer diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a hydrogen sulfide gas detection method based on a nanosheet composite membrane and a sensor. The method comprises the steps of preparing an Au / SnO-SnO2 nanosheet composite material, preparing the hydrogen sulfide gas sensor based on the Au / SnO-SnO2 nanosheet composite membrane and detecting H2S. Results show that the sensor has excellent H2S sensing performance. Under theconditions that the working temperature is 240 DEG C and the environment temperature is 25 DEG C, the prepared sensor has a good linear response relationship to H2S within the range of 1-100 ppm, andthe detection lower limit is as low as 0.7 ppm. The sensor has a short response-recovery time, the response time is 22 s, the recovery time is 63 s, and the sensor is not affected by environmental humidity and has high reproducibility, selectivity and stability. When the sensor is applied to monitoring of H2S in the atmospheric environment, a H2S response signal is only attenuated by 4.69% within90 days, which indicates that the sensor has a long-term stable and continuously operable service life and has wide practical application prospects.

Description

technical field [0001] The invention belongs to the technical field of chemical / biological sensing, and in particular relates to a hydrogen sulfide gas detection method and a sensor based on a nanosheet composite membrane. Background technique [0002] Hydrogen sulfide (H 2 S) is a toxic colorless gas, because hydrogen sulfide is an acute toxic substance, even inhaling a small amount of high concentration hydrogen sulfide can cause death in a short time. Low concentrations of hydrogen sulfide can also damage the eyes, respiratory system and central nervous system. Therefore, the development of a high-performance hydrogen sulfide gas sensor is very important for environmental protection and human life and health. [0003] In recent years, metal oxide semiconductors such as SnO 2 , ZnO, WO 3 , CuO, Co 3 o 4 , NiO and In 2 o 3 etc. Due to the advantages of low cost, high sensitivity, simple manufacture and good chemical stability, they are widely used in the detection of...

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): G01N27/12C04B41/88B22F9/24B82Y30/00B82Y40/00B82Y15/00
CPCB22F9/24B82Y15/00B82Y30/00B82Y40/00C04B41/009C04B41/5116C04B41/88G01N27/127C04B35/10C04B41/505
Inventor 肖忠良黄颖邹浩云曹忠唐彤雨毛先辉龙姝
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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