Ar plasma treatment on ZnO–SnO2 heterojunction nanofibers and its enhancement mechanism of hydrogen gas sensing
Source abstract
Abstract
Abstract In this study, ZnO–SnO2 heterojunction nanofibers were fabricated using electrospinning and treated by Ar plasma. The post treatment demonstrated the ability to regulate adsorbed oxygen of nanofibers and thus affecting the gas sensing performance. The results revealed that the gas sensing performances increased with the increase of plasma treatment time at first, then showed a downward trend. The setting for the best H2 gas performance was 20 min of plasma treatment, under which the response of the sample was 80% higher and the response time was two thirds shorter than those of the untreated sample. The explanation can be that appropriate plasma treatment can increase the oxygen vacancy on the surface of heterojunction nanofibers as well as the resistance modulation range in the air; however, excessive plasma treatment can result in the reduction of the resistance modulation range in the air by reducing the metal oxide to metal.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Sensor and Energy Harvesting Materials · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Synergistic effects in gas sensing semiconducting oxide nano-heterostructures: a review10.1016/j.snb.2019.01.049 ↗
2. Gas sensing mechanisms of metal oxide semiconductors: a focus review10.1039/C9NR07699A ↗
3. Synergistic effects of codecoration of oxide nanoparticles on the gas sensing performance of In2O3 nanorods10.1016/j.snb.2015.12.098 ↗
4. Highly selective and sensitive xylene sensors using Cr2O3-ZnCr2O4 hetero-nanostructures prepared by galvanic replacement10.1016/j.snb.2016.05.104 ↗
5. Progress in the development of semiconducting metal oxide gas sensors: a review10.1088/1361-6501/aa7443 ↗
6. SnO2 nanoparticles-reduced graphene oxide nanocomposites for NO2 sensing at low operating temperature10.1016/j.snb.2013.08.067 ↗
7. Designed synthesis of In2O3 beads@TiO2-in2O3 composite nanofibers for high performance NO2 sensor at room temperature10.1021/acsami.5b09496 ↗
8. The role of NiO doping in reducing the impact of humidity on the performance of SnO2-based gas sensors: synthesis strategies, and phenomenological and spectroscopic studies10.1002/adfm.201101154 ↗
9. Methanol, ethanol and hydrogen sensing using metal oxide and metal (TiO2-Pt) composite nanoclusters on GaN nanowires: a new route towards tailoring the selectivity of nanowire/nanocluster chemical sensors10.1088/0957-4484/23/17/175501 ↗
10. Hybrid Co3O4/SnO2 core-shell nanospheres as real-time rapid-response sensors for ammonia gas10.1021/acsami.6b00305 ↗
11. Effective ammonia detection using n-ZnO/p-NiO heterostructured nanofibers10.1109/JSEN.2016.2517085 ↗
12. Selective detection of formaldehyde gas using a Cd-doped TiO2-SnO2 sensor10.3390/s91109029 ↗
13. Room-temperature gas sensing of ZnO-based gas sensor: a review10.1016/j.sna.2017.10.021 ↗
14. Gas-sensing properties of SnO2-TiO2-based sensor for volatile organic compound gas and its sensing mechanism10.1016/j.physb.2009.11.086 ↗
15. Electrospun ZnO/TiO2 composite nanofibers as a bactericidal agent10.1039/c1cc12872h ↗
16. XPS and optical studies of different morphologies of ZnO nanostructures prepared by microwave methods10.1016/j.ceramint.2012.08.075 ↗
17. XPS study of the surface chemistry of L-CVD SnO2 thin films after oxidation10.1016/j.tsf.2005.04.014 ↗
18. Hierarchical composites of MoS2 nanoflower anchored on SnO2 nanofiber for methane sensing10.1016/j.ceramint.2019.07.342 ↗
19. Hydrogen sensing properties of pure and composites of ZnO and SnO2 particles: understanding sensing mechanism10.1166/sl.2017.3870 ↗
20. Low-temperature prototype hydrogen sensors using Pd-decorated SnO2 nanowires for exhaled breath applications10.1016/j.snb.2017.06.141 ↗
21. Detection of hydrogen with SnO2-coated ZnO nanorods10.1016/j.apsusc.2006.10.056 ↗
22. Bifunctional sensing mechanism of SnO2-ZnO composite nanofibers for drastically enhancing the sensing behavior in H2 gas10.1021/acsami.5b01817 ↗
23. Hydrogen induced metallicity on the ZnO(1010) surface10.1103/PhysRevLett.95.266104 ↗
24. Computational study of surface orientation effect of rutile TiO2 on H2S and CO sensing mechanism10.1016/j.apsusc.2019.143619 ↗