| Literature DB >> 24355775 |
Do Dang Trung1, Nguyen Duc Hoa2, Pham Van Tong1, Nguyen Van Duy1, T D Dao3, H V Chung3, T Nagao3, Nguyen Van Hieu4.
Abstract
Decoration of noble metal nanoparticles (NPs) on the surface of semiconducting metal oxide nanowires (NWs) to enhance material characteristics, functionalization, and sensing abilities has attracted increasing interests from researchers worldwide. In this study, we introduce an effective method for the decoration of Pd NPs on the surface of SnO2 NWs to enhance CO gas-sensing performance. Single-crystal SnO2 NWs were fabricated by chemical vapor deposition, whereas Pd NPs were decorated on the surface of SnO2 NWs by in situ reduction of the Pd complex at room temperature without using any linker or reduction agent excepting the copolymer P123. The materials were characterized by advanced techniques, such as high-resolution transmission electron microscopy, scanning transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The Pd NPs were effectively decorated on the surface of SnO2 NWs. As an example, the CO sensing characteristics of SnO2 NWs decorated with Pd NPs were investigated at different temperatures. Results revealed that the gas sensor exhibited excellent sensing performance to CO at low concentration (1-25ppm) with ultrafast response-recovery time (in seconds), high responsivity, good stability, and reproducibility.Entities:
Keywords: CO gas sensor; Pd NPs decoration; SnO(2) nanowire
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Year: 2013 PMID： 24355775 DOI： 10.1016/j.jhazmat.2013.11.054
Source DB: PubMed Journal: J Hazard Mater ISSN： 0304-3894 Impact factor: 10.588