Palladium Hexagonal Nanoparticles/Carbon Nanotubes/Cellulose Nanocrystals Integrated over Paper for Wearable Hydrogen Sensing with Fast Response by Bridging Behavior

IF 8 1区 化学 Q1 CHEMISTRY, ANALYTICAL
Zhenxu Li, Dongliang Feng, Zhu Zhang, Xinhua Zhao, Xiaxia Xing, Dachi Yang
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引用次数: 0

Abstract

Wearable hydrogen (H2) sensing with fast response and excellent flexibility is highly desired for those workers who are exposed to flammable and explosive H2, however, it needs further exploring. Here, wearable H2 sensing with fast response at room temperature (~25 °C) has been developed by integrating palladium hexagonal nanoparticles/carbon nanotubes/cellulose nanocrystals over filter paper (P-Pd HNPs/CNTs/CNCs). By optimizing the wet-chemical approach, Pd HNPs (edge length, ~7.33 nm) have been synthesized via the simultaneous reduction of CNCs and ethanol, resulting in a random dispersion around the surface of cross-linked CNTs. Beneficially, P-Pd HNPs/CNTs/CNCs shows fast response/recovery time (3 s/3 s) to 0.5 v/v% H2 and can detect 50 ppm H2. Additionally, it exhibits excellent wearable sensing durability, including the resistance to freezing, pressing and peeling off the sensing materials. Theoretically, such fast-response H2 sensing can be interpreted that H2 is adsorbed over Pd to form PdHx intermediates, and the “bridging behavior” between CNCs and CNTs facilitates the H2 diffusion and promotes electron hopping and tunneling. Potentially, this “bridging behavior” that contributes to fast-response H2 sensing might be applied to other sensing materials for wearable gas detection.

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来源期刊
Sensors and Actuators B: Chemical
Sensors and Actuators B: Chemical 工程技术-电化学
CiteScore
14.60
自引率
11.90%
发文量
1776
审稿时长
3.2 months
期刊介绍: Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.
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