Ammonia Sensing Performance at Room Temperature of Ca-Doped CNFs/Al2O3 Gas Sensor DOI Creative Commons

He Gong,

Lingyun Ni,

Hongli Chao

et al.

ACS Omega, Journal Year: 2024, Volume and Issue: 9(42), P. 42932 - 42943

Published: Oct. 10, 2024

When NH3 in the environment exceeds a certain concentration, it may have adverse effects on human health. Ammonia gas sensors currently market usually work under high temperatures and are not only expensive but also poor performance terms of selectivity. Therefore, preparation an ammonia sensor that works at room temperature, is low cost, has sensitivity selectivity particularly important. This paper introduces temperature based Ca-doped CNFs/Al2O3 nanocomposite material, prepared using electrospinning, pre-oxidation, carbonization processes. The surface morphology, microstructure, chemical composition materials been characterized by scanning electron microscopy, Raman, X-ray photoelectron spectroscopy. excellent for to other volatile gases such as ethanol, dimethylformamide, HCl, methanol. At 100 ppm NH3, response value can reach 22.73, demonstrating repeatability long-term stability. Its affected environmental humidity, providing great convenience practical applications. In addition, we discuss sensing mechanism sensor. provides effective methods development high-performance expected play role field monitoring.

Language: Английский

Tm-Doped Zno Monolayers as Indoor Toxic Gas Sensors: A First-Principles Study DOI
Zengming Qin,

ZeJun Xu,

Xiufu Sun

et al.

Published: Jan. 1, 2025

Indoor air pollution, especially the pollution caused by volatile toxic gases, poses significant risks to health and therefore requires effective monitoring. Based on density functional theory, adsorption performance of ZnO with vacancy defects modified transition metals (Ag, Au, Pd, Rh Ru) for gases (C6H6, HCHO, NH3) was studied through systematic analysis structure, band charge transfer, states. The calculation results indicate that doping can form stable structures ZnO. For C6H6 gas molecules, although interactions in all TM-ZnO systems are mainly physical adsorption, HCHO NH3 molecules exhibit chemical behavior Rh-ZnO Ru-ZnO surfaces. conductivity model changes varying degrees. Except low sensitivity Pd-ZnO system, other high sensitivity. Furthermore, at room temperature, Au-ZnO/C6H6, Ru-ZnO/C6H6, Rh-ZnO/HCHO, Rh-ZnO/NH3 Ru-ZnO/NH3 good recovery times. study sensing mechanism is great significance. This research elucidates capability metal doped monolayers, laying foundation development indoor devices. These insights contribute advanced technologies.

Language: Английский

Citations

0
TM-Doped ZnO Monolayers as Indoor Toxic Gas Sensors: A First-Principles Study DOI

ZengMing Qin,

ZeJun Xu,

Xue‐Long Sun

et al.

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106539 - 106539

Published: April 1, 2025

Language: Английский

Citations

0
Adsorption of LIBs Thermal Runaway Gases on TM-Decorated HfS2 Surface: A DFT Study DOI
Xinchun Li, Pengtao Wang, Kun Xie

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(27), P. 14099 - 14109

Published: June 26, 2024

With the wide application of lithium-ion batteries (LIBs) in different fields, safety accidents occur frequently. Therefore, it is necessary to monitor thermal runaway gas for an early warning. In this article, adsorption properties characteristic gases LIBs are studied by density functional theory (DFT). The structure TM (Co/Rh/Ir)-decorated HfS2 (TM@HfS2) established, and its C2H4, CH4, CO studied. energy, charge transfer, band, DOS, difference density, work function, recovery time discussed detail. results show that Ir@HfS2 has strongest performance C2H4 CO, so can be stably adsorbed on surface monolayer. energy CH4 Co@HfS2 stronger than those Rh@HfS2 Ir@HfS2, but still very small. By applying biaxial strain Co@HfS2, we found increases with increase negative strain. This study provides a theoretical basis regulation transition metals.

Language: Английский

Citations

3
Adsorption behavior of SF6 partial discharge decomposition components on metal (Pt, Pd) modified ZnO surfaces DOI

Langlang Lv,

Kexin Zhu, Xiangyu Wang

et al.

Computational and Theoretical Chemistry, Journal Year: 2024, Volume and Issue: 1241, P. 114860 - 114860

Published: Sept. 11, 2024

Language: Английский

Citations

3
High Selectivity MEMS C2H2 Sensor for Transformer Fault Characteristic Gas Detection** DOI
Yifeng Xu, Haixia Mei, Bing Yu

et al.

Analysis & Sensing, Journal Year: 2024, Volume and Issue: 4(6)

Published: June 27, 2024

Abstract Acetylene (C 2 H ), as an important characteristic gas in transformer fault diagnosis, should be accurately detected and effectively distinguished from other dissolved gases (H , CH 4 C 6 CO, CO which is crucial to determine whether the occurs type, but also faces challenges now. The rational design employment of rare earth noble metals are expected address this issue. In work, SnO ‐3 at% Sm O 3 ‐1 PdO based MEMS sensor was prepared achieve high performance detection has a response value 56 50 ppm response/recovery time s/136 s, lower limit 1 ppm, power consumption 15.5 mW, weak cross sensitivity gases. Lewis acids bases theory used explain reason why benefit element improve selectivity . formation oxygen vacancies hetero junctions increased material. This study proved feasibility potential additives enable advanced gas‐sensitive materials for highly selective detection.

Language: Английский

Citations

2
Influence of pH on Room-Temperature Synthesis of Zinc Oxide Nanoparticles for Flexible Gas Sensor Applications DOI Creative Commons

Fazia Mechai,

Ahmad Al Shboul,

Mohand Outahar Bensidhoum

et al.

Chemosensors, Journal Year: 2024, Volume and Issue: 12(5), P. 83 - 83

Published: May 16, 2024

This research contributes to work on synthesizing zinc oxide nanoparticles (ZnO NPs) at room temperature (RT) and their utilization in flexible gas sensors. RT ZnO NP synthesis with a basicity solution (pH ≈ 13) demonstrates an efficient method for well-crystalline NPs (RT.pH13) comparable those synthesized by the hydrothermal (hyd.C). The RT.pH13 achieved high thermal stability minimal organic reside impurities (~4.2 wt%), 30–80 nm particle size distribution, specific surface area (14 m2 g−1). pre- post-calcinated were then incorporated into sensors sensing applications ambient conditions (RT relative humidity of 30–50%). pre-calcinated ZnO-based sensor demonstrated superior sensitivity styrene acetic acid lower dimethyl-6-octenal. calcinated (RT.pH13.C) exhibited acid, but heightened benzene, acetone, ethanol. suggests correlation between structural transformations following calcination. investigation mechanisms highlighted role properties sensors’ affinity molecules variations. study further explored mechanical flexibility, which is crucial Internet Things (IoT) applications.

Language: Английский

Citations

1
High response acetone sensor with ppb detection based on Pd-Pt/ZnO nanoflowers in-situ grown on planar substrates DOI
Yanhu Li, Mei Chen,

Linghong Xue

et al.

Materials Science in Semiconductor Processing, Journal Year: 2024, Volume and Issue: 186, P. 109100 - 109100

Published: Nov. 9, 2024

Language: Английский

Citations

1
Dual-configuration Pd4 facilitates Janus SnSSe monolayer capture of electrical equipment fault gases (C2H2, C2H4, CO): A DFT Study DOI

Guozhi Lin,

Haonan Xie, Hao Wu

et al.

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: unknown, P. 136015 - 136015

Published: Dec. 1, 2024

Language: Английский

Citations

1
Ammonia Sensing Performance at Room Temperature of Ca-Doped CNFs/Al2O3 Gas Sensor DOI Creative Commons

He Gong,

Lingyun Ni,

Hongli Chao

et al.

ACS Omega, Journal Year: 2024, Volume and Issue: 9(42), P. 42932 - 42943

Published: Oct. 10, 2024

When NH3 in the environment exceeds a certain concentration, it may have adverse effects on human health. Ammonia gas sensors currently market usually work under high temperatures and are not only expensive but also poor performance terms of selectivity. Therefore, preparation an ammonia sensor that works at room temperature, is low cost, has sensitivity selectivity particularly important. This paper introduces temperature based Ca-doped CNFs/Al2O3 nanocomposite material, prepared using electrospinning, pre-oxidation, carbonization processes. The surface morphology, microstructure, chemical composition materials been characterized by scanning electron microscopy, Raman, X-ray photoelectron spectroscopy. excellent for to other volatile gases such as ethanol, dimethylformamide, HCl, methanol. At 100 ppm NH3, response value can reach 22.73, demonstrating repeatability long-term stability. Its affected environmental humidity, providing great convenience practical applications. In addition, we discuss sensing mechanism sensor. provides effective methods development high-performance expected play role field monitoring.

Language: Английский

Citations

0