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Cuprous oxide nanowires/nanoparticles decorated on reduced graphene oxide nanosheets: Sensitive and selective H2S detection at low temperature
- Source :
- Materials Letters. 254:336-339
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Hydrogen sulfide (H2S) is a colorless gas with a smell of rotten eggs which poses great threat on human health and environmental protection. Traditional metal oxide based H2S sensors always suffer from undesirable selectivity and elevated operation temperature. To overcome these obstacles, in this report cuprous oxide nanowires/nanoparticles (Cu2O) anchored onto reduced graphene oxide nanosheets (rGO) were prepared to serve as the sensing layer. Multiple characterization techniques such as SEM, TEM, FTIR, and XRD were utilized to explore the sensor performance toward H2S gas. Compared to the partial recovery at 25 °C, the prepared rGO/Cu2O sensor showed a response of 20% toward 1 ppm H2S at 40 °C, together with full restoration, excellent repeatability, long-term stability and selectivity. Favorable film porosity, highly conductive rGO nanosheets and nanometer size effect of Cu2O materials were responsible for these inspiring results, paving the avenue for future trace H2S detection in the aspects of higher sensitivity and lower power-consumption.
- Subjects :
- Materials science
Graphene
Mechanical Engineering
Hydrogen sulfide
Nanowire
Oxide
Nanoparticle
Nanotechnology
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
law.invention
chemistry.chemical_compound
chemistry
Mechanics of Materials
law
General Materials Science
Fourier transform infrared spectroscopy
0210 nano-technology
Porosity
Selectivity
Subjects
Details
- ISSN :
- 0167577X
- Volume :
- 254
- Database :
- OpenAIRE
- Journal :
- Materials Letters
- Accession number :
- edsair.doi...........a337577a03d4efd04afbbcd97f6a9366