Cited 9 time in webofscience Cited 10 time in scopus

Colorimetric hydrogen gas sensor based on PdO/metal oxides hybrid nanoparticles

Title
Colorimetric hydrogen gas sensor based on PdO/metal oxides hybrid nanoparticles
Authors
Kim, Young KwangHwang, Sung-HoJeong, Soon MoonSon, Ka YoungLim, Sang Kyoo
DGIST Authors
Hwang, Sung-HoJeong, Soon MoonLim, Sang Kyoo
Issue Date
2018-10
Citation
Talanta, 188, 356-364
Type
Article
Article Type
Article
Keywords
HydrogenColorimetric sensorPalladium oxideZinc oxideTHIN-FILMSCATALYSTSPDTECHNOLOGYCOMPOSITESUPPORTSAFETY
ISSN
0039-9140
Abstract
We have synthesized new colorimetric hydrogen-sensing materials, PdO/metal oxide hybrid nanoparticles, in which palladium oxide was loaded upon surface of substrate materials via an acid-base reaction between a H2PdCl4 solution and substrate materials, ZnO, MgO, TiO2, and SiO2 respectively at 25 °C. The colorimetric hydrogen gas sensing properties of all the samples, PdO/ZnO, PdO/MgO, PdO/TiO2 and PdO/SiO2, were characterized and compared in order to investigate how hydrogen gas sensitivity would be affected by surface property of substrate materials. It was confirmed that the amount of the loaded PdO, which was thought to be closely related with the colorimetric hydrogen sensitivity, was quite different according to the substrate materials and was increased with increasing of the basicity of substrate materials (ZnO > MgO > TiO2 > SiO2). Consequently, among the PdO/metal oxide hybrid nanoparticles, the largest amount of PdO was observed to be loaded on ZnO substrate nanoparticles due to its highest basicity. The best colorimetric hydrogen gas sensing properties (color difference, ΔE = 71.57) was observed in PdO/ZnO hybrid nanoparticles, showing the most prominent color change from brown to black, when the sample was exposed to hydrogen gas of 4 vol% balanced with nitrogen for 2 min. © 2018
URI
http://hdl.handle.net/20.500.11750/6665
DOI
10.1016/j.talanta.2018.06.010
Publisher
Elsevier BV
Related Researcher
Files:
There are no files associated with this item.
Collection:
Smart Textile Convergence Research Group1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE