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Electrochemical and Semiconductor Gas Sensors and Their Applications

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1846

Special Issue Editor


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Guest Editor
State Key Lab of Mechanics and Control of Mechanical, Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: ultrasonic sensors and actuators; ultrasonic nanofabrication and ultrasonic micro/nano/molecular manipulations
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Special Issue Information

Dear Colleague,

Gas sensors have become an essential device technology in our modern era for various applications, such as environmental monitoring, smart homes, and industrial and medical purposes. In this respect, we are delighted to announce that our upcoming Special Issue will focus on the latest developments in fundamental and applied research related to two common types of gas sensors: electrochemical and semiconductor gas sensors.

Electrochemical gas sensors work by relying on a chemical reaction between the target gas and an electrolyte to generate an electrical signal, while semiconductor gas sensors utilize a semiconductor material, such as metal oxide, to detect changes in electrical conductivity when exposed to specific gases.

We invite both original research papers and review articles that showcase significant developments in these fields. We hope that this Special Issue will provide a comprehensive overview of the current state and future prospects regarding the aforementioned topics.

If you want to learn more information or need any advice, you can contact the Special Issue Editor Anika Deng via [email protected] directly.

Prof. Dr. Junhui Hu
Guest Editor

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Published Papers (1 paper)

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Research

19 pages, 12910 KiB  
Article
Experimental and Density Functional Theory Simulation Research on PdO–SnO2 Nanosheet Ethanol Gas Sensors
by Hao Wu, Jianwei Zhang, Huichao Zhu, Xiaogan Li, Hongxu Liu, Zhenan Tang, Guanyu Yao and Jun Yu
Sensors 2024, 24(15), 4970; https://doi.org/10.3390/s24154970 - 31 Jul 2024
Viewed by 1013
Abstract
Pure SnO2 and 1 at.% PdO–SnO2 materials were prepared using a simple hydrothermal method. The micromorphology and element valence state of the material were characterized using XRD, SEM, TEM, and XPS methods. The SEM results showed that the prepared material had [...] Read more.
Pure SnO2 and 1 at.% PdO–SnO2 materials were prepared using a simple hydrothermal method. The micromorphology and element valence state of the material were characterized using XRD, SEM, TEM, and XPS methods. The SEM results showed that the prepared material had a two-dimensional nanosheet morphology, and the formation of PdO and SnO2 heterostructures was validated through TEM. Due to the influence of the heterojunction, in the XPS test, the energy spectrum peaks of Sn and O in PdO–SnO2 were shifted by 0.2 eV compared with SnO2. The PdO–SnO2 sensor showed improved ethanol sensing performance compared to the pure SnO2 sensor, since it benefited from the large specific surface area of the nanosheet structure, the modulation effect of the PdO–SnO2 heterojunction on resistance, and the catalyst effect of PdO on the adsorption of oxygen. A DFT calculation study of the ethanol adsorption characteristics of the PdO–SnO2 surface was conducted to provide a detailed explanation of the gas-sensing mechanism. PdO was found to improve the reducibility of ethanol, enhance the adsorption of ethanol’s methyl group, and increase the number of adsorption sites. A synergistic effect based on the continuous adsorption sites was also deduced. Full article
(This article belongs to the Special Issue Electrochemical and Semiconductor Gas Sensors and Their Applications)
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