Hydrothermal synthesis and gas sensing properties of hexagonal and orthorhombic WO3 nanostructures
Source abstract
Abstract
Abstract Hollow cauliflower-like hexagonal WO 3 and cuboid-like orthorhombic WO 3 nanostructures were successfully synthesized via a simple hydrothermal method with the assistance of different surfactants. The products were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The possible formation mechanisms of the different WO 3 morphologies were proposed and the gas sensing properties were also investigated. Our research indicated that the different morphology and crystal phase were crucial for the dissimilarity of the gas sensing performance. The novel cauliflower-like WO 3 sensor exhibited excellent CO sensing properties at 270 °C with higher and faster response, which may benefit from the hollow porous structure and the (001) reactive surfaces of the hexagonal phase. The sensing mechanism was discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Transition Metal Oxide Nanomaterials · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Gas sensors based on nanostructured materials10.1039/b704562j ↗
2. Solgel-based hydrothermal method for the synthesis of 3D flower-like ZnO microstructures composed of nanosheets for photocatalytic applications10.1016/j.ceramint.2013.10.140 ↗
3. Effect of cation intercalation on the growth of hexagonal WO3 nanorods10.1021/jp301210q ↗
4. Hydrothermal synthesis of assembled WO3·H2O nanoflowers with enhanced gas sensing performance10.1016/j.matlet.2016.02.077 ↗
5. Formation of WO3 nanotube-based bundles directed by NaHSO4 and its application in water treatment10.1039/C2TA00382A ↗
6. Complexing surfactants-mediated hydrothermal synthesis of WO3 microspheres for gas sensing applications10.1016/j.matlet.2015.10.067 ↗
7. Gas sensors using hierarchical and hollow oxide nanostructures: overview10.1016/j.snb.2009.04.026 ↗
8. Hydrothermal synthesis of self-assembled hierarchical tungsten oxides hollow spheres and their gas sensing properties10.1021/am508121p ↗
9. The high-temperature phases of WO310.1006/jssc.1999.8173 ↗
10. Hydrothermal synthesis, characterization of h-WO3 nanowires and gas sensing of thin film sensor based on this powder10.1016/j.tsf.2014.12.037 ↗
11. Green synthesis of hexagonal-shaped WO3·0.33H2O nanodiscs composed of nanosheets10.1021/cg800609n ↗
12. Systematic investigation on the gas-sensing performance of TiO2 nanoplate sensors for enhanced detection on toxic gases10.1016/j.materresbull.2015.09.012 ↗
13. Synthesis of tin dioxide octahedral nanoparticles with exposed high-energy {2 21} facets and enhanced gas-sensing properties10.1002/anie.200903926 ↗
14. Hierarchically designed ZnO nanostructure based high performance gas sensors10.1039/C4RA08732A ↗
15. Enhanced ethanol sensing performance of mesoporous Sn-doped ZnO10.1016/j.mssp.2015.10.001 ↗
16. Controlling the morphologies of WO3 particles and tuning the gas sensing properties10.1039/c2nj40600d ↗
17. Hydrothermal synthesis and gas sensing properties of WO3·H2O with different morphologies10.1016/j.physe.2013.09.005 ↗
18. Heterogeneous metal-oxide nanowire microsensor array for gas sensing10.1088/2053-1591/1/2/025002 ↗
19. Conversion of ethanol to acetone & other produces using nano-sensor SnO2 (110): ab initio DFT
20. Mechanism of CO and O3 sensing on WO3 surfaces: first principle study10.1016/j.snb.2011.08.018 ↗
21. CO sensing mechanism with WO3 based gas sensors10.1016/j.snb.2010.09.040 ↗
22. Enhanced CO gas sensing properties of Pt-functionalized WO3 nanorods10.1016/j.tca.2011.12.002 ↗
23. Pt/WO3 thin films prepared by photochemical metal-organic deposition (PMOD) and its evaluation as carbon monoxide sensor10.1016/j.poly.2012.04.028 ↗
24. Fine-tuning of ceramic-based chemical sensors via novel microstructural modification Ⅰ: low level CO sensing by tungsten oxide, WO310.1016/j.snb.2005.12.043 ↗
25. Low temperature CO sensitive nanostructured WO3 thin films doped with Fe10.1016/j.snb.2011.11.038 ↗
26. Fast identification of CO by using single Pt-modified WO3 sensing film based on optical modulation
27. Highly sensitive and ultra-fast responding gas sensors using self-assembled hierarchical SnO2 spheres10.1016/j.snb.2008.11.016 ↗
28. One-step synthesis of 3D flower-like Zn2SnO4 hierarchical nanostructures and their gas sensing properties10.1016/j.ceramint.2014.09.136 ↗
29. The influence of film structure on In2O3 gas response10.1016/j.tsf.2004.02.018 ↗
30. DFT investigation on CO sensing characteristics of hexagonal and orthorhombic WO3 nanostructures10.1016/j.spmi.2014.11.027 ↗
31. Migrations of oxygen vacancy in tungsten oxide (WO3): a density functional theory study10.1016/j.commatsci.2014.04.018 ↗