A comparative study on surface morphological investigations of ferric oxide for LPG and opto-electronic humidity sensors
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Abstract
Abstract In the present work nanostructured ferric oxides were synthesized via hydroxide precipitation method without using any surfactant and size selection medium. The surface morphologies and structure of samples were analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The structural analysis confirmed the formation of Fe 2 O 3 with α-phase and rhombohedral structure. Optical and thermal properties were investigated by using UV–visible absorption spectroscopy and differential scanning calorimetry (DSC) techniques. Pelletizations of materials were done using hydraulic press and these pellets were investigated with the exposition of liquefied petroleum gas. Variations in resistance of the pellet with time for different concentrations of LPG were recorded at room temperature (27 °C). The maximum value of average sensitivity was found ∼5 for 5 vol.% of LPG. Our results show that the LPG sensing behavior was inspired by the different kinds of surface morphologies of Fe 2 O 3 and inferred that the spherical porous nanoparticles synthesized via hydroxide precipitation process (S-3) had best response to LPG.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · ZnO doping and properties
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References (47)
Show source-provided references
1. EPR Studies on sol–gel derived Fe2O3 nanocrystals in SiO2 matrix
2. Synthesis of nanocrystalline Ni1−xCOxMnxFe2−xO4: a material for LPG Gas sensing10.1016/S0925-4005(02)00429-X ↗
3. Preparation and characterization of ferrites as gas sensor materials10.1023/A:1006716721984 ↗
4. Gas-sensing properties of zinc ferrite nanoparticles synthesized by the molten-salt route10.1111/j.1551-2916.2008.02475.x ↗
5. Nanocrystalline nickel ferrite thick film as an efficient gas sensor at room temperature10.1016/j.snb.2007.11.003 ↗
6. Facile synthesis of nanocrystalline spinel NiFe2O4 via a novel soft chemistry route10.1016/j.matlet.2007.01.111 ↗
7. Porous nickel ferrite for semiconducting gas sensor
8. The influence of substitution of iron ions on the electron hopping in magnetite10.1088/0022-3719/13/13/015 ↗
9. Surface characterization of titanated α-Fe2O310.1021/la00059a042 ↗
10. Preparation, characterization and thermal studies of γ-Fe2O3 and CuO dispersed polycarbonate nanocomposites10.1007/s10973-009-0475-8 ↗
11. Molecular composition of iron oxide nanoparticles precursors for magnetic drug targeting, as characterized by confocal Raman microspectroscopy10.1039/b419004a ↗
12. Magnetic and transport properties of nanostructured ferric oxide produced by mechanical attrition10.1063/1.2227669 ↗
13. Effect of cobalt doping on the magnetic properties of super paramagnetic γ-Fe2O3 polystyrene nanocomposites10.1016/j.jmmm.2004.06.055 ↗
14. Size dependent magnetic properties of iron oxide nanoparticles10.1016/S0304-8853(02)01066-1 ↗
15. Cobalt doped γ-Fe2O3 nanoparticles: synthesis and magnetic properties10.1088/0957-4484/16/4/029 ↗
16. Strain induced anomalous red shift in mesoscopic iron oxide prepared by a novel technique10.1007/s12034-008-0120-3 ↗
17. Synthesis and enhanced ethanol sensing properties of α-Fe2O3/ZnO heteronanostructures10.1016/j.snb.2009.04.011 ↗
18. Ethanol sensors based on nano-sized α-Fe2O3 with SnO2, ZrO2, TiO2 solid solutions10.1016/S0925-4005(03)00191-6 ↗
19. Mechanism of H2S oxidation by ferric oxide and hydroxide surfaces10.1021/jp980361p ↗
20. γ-Fe2O3 and γ-Fe2O3–TiO2 ultrafine particle films as reducing gas sensor
21. Monodisperse hematite porous nanospheres: synthesis, characterization, and applications for gas sensors10.1088/0957-4484/19/12/125606 ↗
22. Preparation and gas-sensing properties of α-Fe2O3 thin films10.1007/BF02653327 ↗
23. Room temperature synthesis of γ-Fe2O3 by sonochemical route and its response towards butane10.1016/j.snb.2007.10.057 ↗
24. Synthesis, characterization and gas sensing properties of undoped and Co-doped γ-Fe2O3-based gas sensors10.1016/j.matlet.2005.10.051 ↗
25. Size control synthesis of uniform β-FeOOH to high coercive field porous magnetic α-Fe2O3 nanorods10.1021/jp808589y ↗
26. The preparation and gas-sensing properties of NiFe2O4 nanocubes and nanorods10.1016/j.snb.2006.10.020 ↗
27. Synthesis and enhanced ethanol sensing characteristics of α-Fe2O3/SnO2 core–shell nanorods
28. Wide band gap semiconductor nano rod and thin film gas sensors10.3390/s6060643 ↗
29. Fe2O3/ZnO core–shell nanorods for gas sensors10.1016/j.snb.2005.11.050 ↗
30. Different morphologies of ZnO nanorods and their sensing property10.1016/j.snb.2010.02.011 ↗
31. Microwave-assisted wet chemical synthesis: advantages, significance and steps to industrialization10.4236/jmmce.2003.22009 ↗
32. Sonochemical synthesis of nanosized hollow hematite10.1021/ja0676657 ↗
33. A new combustion route to γ-Fe2O3 synthesis10.1007/BF02704010 ↗
34. Fabrication and gas sensing properties of Ni-doped gamma-Fe2O3 by anhydrous solvent method10.1016/j.matlet.2006.03.112 ↗
35. Synthesis of Fe2O3/TiO2 nanorod–nanotube arrays by filling TiO2 nanotubes with Fe10.1088/0957-4484/19/31/315601 ↗
36. Conduction model of metal oxide gas sensors10.1023/A:1014405811371 ↗
37. Preparation, characterization and gas sensitive properties of nano-crystalline Cr2O3–Fe2O3 mixed oxides10.1007/BF02877825 ↗
38. A novel method for the preparation of nanosized TiO2 thin films10.1002/adma.19960080410 ↗
39. Preparation of extremely small ZnO particles, fluorescence phenomena and size quantization effects10.1016/0009-2614(85)87255-9 ↗
40. Photoactivity of transparent nanocrystalline Fe2O3 electrodes prepared via anodic electrodeposition10.1021/cm803099k ↗
41. Characterization of nanocrystalline γ-Fe2O3 prepared by wet chemical method10.1557/JMR.1999.0210 ↗
42. Lead adsorption study on combustion derived γ-Fe2O3 surface10.1007/s12034-010-0001-4 ↗
43. Gas sensing properties of porous Cu, Cd and Zn ferrites
44. Synthesis of nanostructured cobalt titanate and its application as liquefied petroleum gas sensor at room temperature10.1166/sl.2011.1508 ↗
45. Synthesis of nanorods and mixed shaped copper ferrite and their applications as liquefied petroleum gas sensor10.1016/j.apsusc.2011.07.094 ↗
46. Optical humidity sensors based on titania films fabricated by sol–gel and thermal evaporation methods10.1088/0957-0233/18/1/032 ↗
47. Sol–gel processed (Mg–Zn–Ti) oxide nanocomposite film deposited on prism base as an opto-electronic humidity sensor10.1016/j.snb.2010.05.046 ↗