Enhanced H{sub 2}S gas sensing properties of multiple-networked Pd-doped SnO{sub 2}-core/ZnO-shell nanorod sensors
- Department of Materials Science and Engineering, Inha University, Incheon 402-751 (Korea, Republic of)
Pd-doped SnO{sub 2}-core/ZnO-shell nanorods were synthesized by using a three-step process: thermal evaporation of Sn powders in an oxygen atmosphere, atomic layer deposition of ZnO, and Pd diffusion followed by annealing. The sensitivity of the multiple networked SnO{sub 2}-core/ZnO-shell nanorod sensor to H{sub 2}S gas was found to be improved further significantly by Pd doping. The Pd-doped SnO{sub 2}-core/ZnO-shell nanorod sensor showed sensitivities of 6.4, 15.4, and 36.2% at H{sub 2}S concentrations of 20, 50, and 100 ppm at room temperature. The sensitivity of the nanorods was improved by more than 10 times at a H{sub 2}S concentration of 100 ppm. The sensitivity enhancement of the SnO{sub 2}-core/ZnO-shell nanorods by Pd doping may be attributed to the spillover effect, active reaction site generation, and the enhancement of chemisorption and dissociation of gas.
- OSTI ID:
- 22215484
- Journal Information:
- Materials Research Bulletin, Vol. 47, Issue 10; Conference: IFFM2011: 2011 international forum on functional materials, Jeju Island (Korea, Republic of), 28-31 Jul 2011, AFM-2: 2. special symposium on advances in functional materials, Jeju Island (Korea, Republic of), 28-31 Jul 2011; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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