Enhanced H{sub 2}S gas sensing properties of multiple-networked Pd-doped SnO{sub 2}-core/ZnO-shell nanorod sensors

Journal Article · Mon Oct 15 04:00:00 EDT 2012 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.04.038· OSTI ID:22215484

Kim, Hyunsu; Jin, Changhyun; Park, Sunghoon ^[1]; Lee, Chongmu ^[1]

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1. 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, Journal Name: Materials Research Bulletin Journal Issue: 10 Vol. 47; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
DOPED MATERIALS
ELECTRICAL PROPERTIES
ELECTRON DIFFRACTION
EVAPORATION
NANOSTRUCTURES
OXYGEN
SEMICONDUCTOR MATERIALS
SENSITIVITY
SENSORS
TIN OXIDES
ZINC OXIDES