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Chemosensors
Special Issues
Functional Nanomaterial-Based Gas Sensors
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Functional Nanomaterial-Based Gas Sensors

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Nanostructures for Chemical Sensing".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 2219

Special Issue Editor

Dr. Juanyuan Hao

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Interests: two-dimensional materials; semiconducting materials; heterostructure; gas sensors; flexible materials

Special Issue Information

Dear Colleagues,

Gas sensors have played an important role in modern society with wide applications in many fields, including real-time air quality monitoring, medical diagnosis, food safety, and public security. The functional materials are key components in gas sensors. Therefore, developing new functional nanomaterials with a high sensing performance is required to develop and ensure the widespread application of gas sensors. The aim of this Special Issue is to collect current fundamental studies regarding advanced gas sensors based on new functional nanomaterials, including metal sulfide, metal oxides, carbon-based materials and their nanocomposites, among others. Research on novel sensing principles or functions at the nanoscale is also encouraged. Both original research findings and review articles are welcome. Potential topics include, but are not limited to, the following:

  • Functional nanomaterials with novel gas sensing properties.
  • Functional nanomaterial hybrids/heterostructures with enhanced sensing properties (selectivity, operating temperature, sensitivity, frequency response, linearity range, stability, and accuracy, among others).
  • Correlation between structures and properties of functional nanomaterials and their sensing performance
  • Functional nanomaterials could be used in multifunctional gas sensors and flexible sensors.

Dr. Juanyuan Hao
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Chemosensors is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • gas sensors
  • metal oxides
  • metal sulfides
  • carbon-based materials
  • new functional nanomaterials
  • nanocomposites
  • flexible sensor

Published Papers (2 papers)

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Research

15 pages, 6985 KiB  
Article
Study of the Gas Sensing Performance of Ni-Doped Perovskite-Structured LaFeO3 Nanospheres
by Fanli Meng, Zhenhua Yu, Renze Zhang, Hongliang Gao and Zhenyu Yuan
Chemosensors 2024, 12(4), 65; https://doi.org/10.3390/chemosensors12040065 - 16 Apr 2024
Viewed by 395
Abstract
This study synthesizes Ni-doped perovskite-structured LaFeO3 composite materials via a one-step hydrothermal method, characterizes the morphology and structure of the materials, and tests their gas sensing performance. The test results show that compared to pure LaFeO3 material, the gas sensing performance [...] Read more.
This study synthesizes Ni-doped perovskite-structured LaFeO3 composite materials via a one-step hydrothermal method, characterizes the morphology and structure of the materials, and tests their gas sensing performance. The test results show that compared to pure LaFeO3 material, the gas sensing performance of Ni-doped LaFeO3 material is improved in all aspects. Specifically, LFO-Ni2% exhibits a response as high as 102 towards 100 ppm of triethylamine at 190 °C, along with better selectivity and stability. Furthermore, the gas sensing mechanism is investigated. On one hand, doping with an appropriate proportion of Ni can lead to the formation of more-complete and smaller-sized microsphere structures with pores. This is beneficial for the adsorption of oxygen from the air onto the material surface, as well as for the diffusion of the target gas to the surface of the material, thereby enhancing gas sensitivity performance. On the other hand, the doped Ni enters the interior of the LaFeO3 crystal, replacing some of the cations in LaFeO3, increasing the concentration of charge carriers in the material, and reducing the material’s resistance. The sample can adsorb more oxygen, promoting the reaction between adsorbed oxygen and the target gas, and thereby improving the gas sensitivity performance of the sample. Full article
(This article belongs to the Special Issue Functional Nanomaterial-Based Gas Sensors)
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13 pages, 3139 KiB  
Article
Nanorods Assembled Hierarchical Bi2S3 for Highly Sensitive Detection of Trace NO2 at Room Temperature
by Yongchao Yang, Chengli Liu, You Wang and Juanyuan Hao
Chemosensors 2024, 12(1), 8; https://doi.org/10.3390/chemosensors12010008 - 04 Jan 2024
Cited by 3 | Viewed by 1523
Abstract
The bismuth sulfide nanostructure has become a promising gas sensing material thanks to its exceptional intrinsic properties. However, pristine Bi2S3 as a room-temperature sensing material cannot achieve the highly sensitive detection of ppb-level NO2 gas. Herein, 1D nanorods with [...] Read more.
The bismuth sulfide nanostructure has become a promising gas sensing material thanks to its exceptional intrinsic properties. However, pristine Bi2S3 as a room-temperature sensing material cannot achieve the highly sensitive detection of ppb-level NO2 gas. Herein, 1D nanorods with self-assembled hierarchical Bi2S3 nanostructures were obtained via a simple hydrothermal process. The as-prepared hierarchical Bi2S3 nanostructures exhibited outstanding NO2 sensing behaviors, such as a high response value (Rg/Ra = 5.8) and a short response/recovery time (τ90 = 28/116 s) upon exposure to 1 ppm NO2. The limit of detection of hierarchical Bi2S3 was down to 50 ppb. Meanwhile, the sensor exhibited excellent selectivity and humidity tolerance. The improved NO2 sensing properties were associated with the self-assembled hierarchical nanostructures, which provided a rich sensing active surface and accelerated the diffusion and adsorption/desorption processes between NO2 molecules and Bi2S3 materials. Additionally, the sensing response of hierarchical Bi2S3 nanostructures is much higher at 100% N2 atmosphere, which is different from the chemisorption oxygen model. Full article
(This article belongs to the Special Issue Functional Nanomaterial-Based Gas Sensors)
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