The Functionalized Single-Walled Carbon Nanotubes Gas Sensor With Pd Nanoparticles for Hydrogen Detection in the High-Voltage Transformers

Sirui Tang; Weigen Chen; He Zhang; Zihao Song; Yanqiong Li; Yu Wang

doi:10.3389/fchem.2020.00174

Frontiers in Chemistry (Apr 2020)

The Functionalized Single-Walled Carbon Nanotubes Gas Sensor With Pd Nanoparticles for Hydrogen Detection in the High-Voltage Transformers

Sirui Tang,
Weigen Chen,
He Zhang,
Zihao Song,
Yanqiong Li,
Yu Wang

Affiliations

Sirui Tang: State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China
Weigen Chen: State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China
He Zhang: State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China
Zihao Song: State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China
Yanqiong Li: School of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing, China
Yu Wang: Shanghai Urban Construction Vocational College, Shanghai, China

DOI: https://doi.org/10.3389/fchem.2020.00174
Journal volume & issue: Vol. 8

Abstract

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Single-walled carbon nanotubes (SWCNTs) have been widely discussed and applied as novel gas sensing nanomaterials. Hydrogen is one of the remarkable fault characteristic gases in high-voltage oil-paper insulated transformers. In this paper, 3.07 wt% Pd nanoparticles (NPs) were used to decorate SWCNTs. The unloaded, the carboxylated, and the Pd-doped SWCNTs were fabricated into three planar gas sensors, and their gas sensing properties to hydrogen were studied. Gas sensing mechanism was analyzed. Results show that the optimal operating temperature of a Pd-doped SWCNTs-based gas sensor is 125°C lower than that of the unloaded SWCNTs-based gas sensor, and it shows the highest gas sensing response value. This is attributed to the decreasing work function of Pd, which reduces the hole carries in the nanotubes.

Published in Frontiers in Chemistry

ISSN: 2296-2646 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://journal.frontiersin.org/journal/chemistry

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