Enhanced performance of γ-Fe 2 O 3 :WO 3 nanocomposite towards selective acetone vapor detection
Source abstract
Abstract
Abstract Metal oxide nanocomposite sensors based on γ-Fe 2 O 3 and WO 3 were investigated in acetone vapor of various concentrations (1–100 ppm) at operating temperatures between 250 and 350 °C. The composites were prepared by simple solid state mixing and porous thick-film gas sensors were fabricated on alumina substrates. The γ-Fe 2 O 3 :WO 3 (50:50) nanocomposite showed a marked enhancement in sensing response down to 1 ppm acetone vapor detection at 300 °C. The response was ~2-fold better compared to pure WO 3 or pure γ-Fe 2 O 3 with a very fast response (1 s) and very short recovery time (3 s). No appreciable sensitivity was observed towards alcohol vapor (an interfacing agent for diabetics) and in moisture (present in breath). The enhanced performance was due to n–n heterojunction effect.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Chemical Sensor Technologies · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. The clinical potential of exhaled Breath for diabetes mellitus10.1016/j.diabres.2012.02.006 ↗
2. Highly sensitive carbon nanotubes–SnO2nanocomposite sensor for acetone detection in diabetes mellitus breath10.1016/j.snb.2014.08.082 ↗
3. A study on breath acetone in diabetic patients using a cavity ring down breath analyzer: exploring correlations of breath ace-tone with blood glucose and glycohemoglobin A1C10.1109/JSEN.2009.2035730 ↗
4. Metal oxide sensors10.1016/0925-4005(96)80098-0 ↗
5. Metal oxide gas sensors: sensitivity and influencing factors10.3390/s100302088 ↗
6. Metal oxide semi-conductor gas sensors in environmental monitoring10.3390/s100605469 ↗
7. Selective-hydrogen sensing at room temperature with Pt-coated InN nanobelts10.1063/1.3033548 ↗
8. Gas sensors in a dynamic operation mode10.1088/0957-0233/19/5/055205 ↗
9. Low temperature methane sensing byelectrochemically grown and surface modified ZnO thin films10.1016/j.snb.2008.07.021 ↗
10. A highly sensitive ethanol sensor based on mesoporous ZnO–SnO2 nanofibers10.1088/0957-4484/20/7/075501 ↗
11. Role of hetero-junctions in oxide semiconductor gas sensors10.1016/S0921-5107(96)01648-0 ↗
12. Highly sensitive mixed oxide sensors for the detection of ethanol10.1016/S0925-4005(02)00220-4 ↗
13. A nanoscale metal oxide-based heterojunctions for gas sensing: a review10.1016/j.snb.2014.07.074 ↗
14. Gas sensing studies of a n-n hetero-junction array based on WO3 and ZnO Composites10.1109/JSEN.2014.2324285 ↗
15. Mixed oxides as gas sensors10.1016/S0040-6090(01)00987-7 ↗
16. ZnO–SnO2 based composite type gas sensor for selective hydrogen Sensing10.1016/j.snb.2013.12.093 ↗
17. A selective NH3 gas sensor based on Fe2O3–ZnO nanocomposites at room temperature10.1016/j.snb.2005.08.010 ↗
18. Preparation,characterization of WO3–SnO2 nanocomposites and their sensing properties for NO210.1016/j.snb.2010.08.007 ↗
19. Highly sensitive and selective trimethylamine sensor using one-dimensional ZnO–Cr2O3 hetero-nanostructures10.1088/0957-4484/23/24/245501 ↗
20. Electrospun nanfibers of CuO–SnO2 nanocomposite as semiconductor gas sensors for H2S detection10.1016/j.snb.2012.09.035 ↗
21. Enhanced gas sensing properties by SnO2 nanosphere functionalized TiO2 nanobelt10.1039/c2jm15017d ↗
22. Nonaqueous synthesis of Ag-functionalized In2O3/ZnO nanocomposites for highly sensitive formaldehyde sensor10.1016/j.snb.2015.09.107 ↗
23. Synthesis and characterization of ITO-ZnO nanocomposite and its application as NO2 gas sensor10.1016/j.ceramint.2015.01.098 ↗
24. Facile synthesis of α-Fe2O3@SnO2 core–shell heterostructure nanotubes for high performance gas sensors10.1016/j.snb.2015.01.130 ↗
25. Effect of composition and temperature on conductive and sensing properties of CeO2+In2O3 nanocomposite films10.1016/j.snb.2014.12.022 ↗
26. Oxidizing gas sensing properties of the n-ZnO/p-Co3O4 composite nanoparticle network sensor10.1016/j.snb.2015.08.006 ↗
27. Synthesis, characterization and gas-sensing properties of SILAR deposited ZnO-CdO nano-composite thin film10.1016/j.snb.2014.09.111 ↗
28. Enhanced acetone response in co- precipitated WO3 nanostructures upon indium doping10.1016/j.snb.2014.11.138 ↗
29. Ferroelectric WO3 nanoparticles for acetone selective detection10.1021/cm800761e ↗
30. Si:WO3 sensors for highly selective detection of acetone for easy diagnosis of diabetes by breath analysis10.1021/ac902695n ↗
31. Pure and Pt-loaded gamma iron oxide as sensor for detection of sub ppm level of acetone10.1016/j.snb.2011.03.047 ↗
32. Preparation of iron oxide thin film by metal organic deposition fom Fe(III)-acetylacetonate: a study of photocatalytic properties10.1016/S0040-6090(00)01547-9 ↗
33. Nickel-doped tin oxide nanofibers prepared by electrospinning for acetone sensing10.1016/j.snb.2013.08.098 ↗
34. Ethanol monitoring by ZnFe2O4 thin film obtained by spray pyrolysis10.1016/j.snb.2012.09.061 ↗
35. Synthesis, characterization and low concentration ethanol sensing performance of sol–gel derived La(III) doped tin oxide
36. A. Sen, H.S. Maiti, The effect of palladium incorporation on methane sensitivity of antimony doped tin dioxide, Mats
37. Preparation, characterization and acetone sensing properties of Ce-doped SnO2 hollow spheres10.1016/j.snb.2012.07.115 ↗
38. Theory of power laws for semiconductor gas sensors10.1016/j.snb.2007.07.036 ↗
39. WO3 nanocrystals: synthesis and application in highly sensitive detection of acetone10.1016/j.snb.2011.02.047 ↗