Highly sensitive room-temperature CO gas sensors: Pt and Pd nanoparticle-decorated In 2O 3 flower-like nanobundles

Hsiang Yu Lai, Chun-Hua Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

We discovered a promising room-temperature CO sensing capability of Pt or Pd nanoparticle-functionalized In 2O 3 flower-like nanobundles (NBs) composed of parallel nanoparticle-chains. The highly branched In 2O 3 flower-like NBs synthesized through the process of hydrolysis of InCl 3 in NaBH 4 aqueous solution and the subsequent heat treatment provided an extremely porous matrix required for high-performance gas sensors. The Pt and Pd nanoparticles uniformly deposited on the In 2O 3 NBs evidently play a key role in enhancing the sensitivity and response, and most importantly lowering the operating temperature to 25 °C for the detection of CO gas. The present innovative hybrid nanostructures offer a potential platform for room-temperature oxide-based gas nanosensors. Moreover, the resulting sensing behaviours lead to a better understanding of using and designing such nanosensors for a number of gas sensory applications.

Original languageEnglish
Pages (from-to)13204-13208
Number of pages5
JournalJournal of Materials Chemistry
Volume22
Issue number26
DOIs
StatePublished - 14 Jul 2012

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