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Gas sensors convert gas-related information into usable data by monitoring changes in conductivity and chemical reactions resulting from the adsorption of gas molecules. Recently, perovskites have emerged as promising candidate materials for gas sensors, owing to their polar reactivity, chemical responsiveness, and sensitivity. These characteristics enable the detection of the presence and concentration of various gases. This article provides a concise review of recent advancements in perovskite-based gas sensors. First, the chemical composition, structure, and preparation methods of perovskites, as well as the effects of their structure on gas sensing performance, are examined. The key performance parameters of the sensor and the sensing mechanism of the perovskite-based gas sensor are discussed. Then the development of gas sensors based on different structural types of perovskites, including single-component perovskites, mixed-component perovskites, and metal-oxide perovskites, is discussed. Finally, the challenges and opportunities for gas sensors based on perovskites are summarized and prospected.
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http://dx.doi.org/10.1039/d4mh01306a | DOI Listing |
Mar Pollut Bull
March 2025
Estonian Marine Institute, University of Tartu, Mäealuse 14, 12618 Tallinn, Estonia.
It is time consuming and expensive to monitor extensive areas of coastal waters with sufficient frequency using in situ (ship based) methods. Satellite remote sensing is much more cost effective. Satellites can detect Optically Active Constituents (OACs) in water.
View Article and Find Full Text PDFHeliyon
February 2025
Department of Physics, Faculty of Science, University of Lagos, Nigeria.
Indoor physical intrusion detector systems are rendered ineffective and inefficient if the frequency of false alarms is high. The sensor technology deployed and the sensor architecture implemented determines the sensitivity of the intrusion alarm systems and the rate of false alarms. Here we report the development of an innovative smart reliable, easily deployable, indoor physical intrusion detector and intruder immobilizer system for security applications.
View Article and Find Full Text PDFChemosensors (Basel)
May 2024
Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76010, USA.
Colorimetric chemical sensing of target gases, such as hydrogen peroxide vapors, is an evolving area of research that implements responsive materials that undergo molecule-specific interaction, resulting in a visible color change. Due to the intuitive nature of an observable color change, such sensing systems are particularly desirable as they can be widely deployed at low cost and without the need for complex analytical instrumentation. In this work, we describe our development of a new spray-on sensing material that can provide a colorimetric response to the presence of a gas-phase target, specifically hydrogen peroxide vapor.
View Article and Find Full Text PDFSci Rep
March 2025
Laboratory of Materials, Signals, Systems and Physical Modeling, Faculty of Science, University Ibn Zohr, Agadir, Morocco.
This study explores the development of highly sensitive hydrogen sulfide (HS) gas sensors employing hierarchical aluminum-doped zinc oxide (AZO) nanostructures. Vertically oriented AZO nanoplatelets with Al/ZnO molar ratios of 4% and 6% were successfully synthesized using an automated successive ionic layer adsorption and reaction (SILAR) technique. The morphological features of the AZO films significantly changed with the Al content.
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March 2025
State Key Laboratory of Functional Materials and Devices for Special Environments Conditions, Xinjiang Key Laboratory of Electronic Information Materials & Devices, Xinjiang Technical Institute of Physics & Chemistry of CAS, 40-1 South Beijing Road, Urumqi, 830011, People's Republic of China.
The accurate and expeditious detection of minute biomolecules within human body fluids holds paramount significance in the advancement of novel electrode materials. In this research, a novel non-enzyme electrochemical sensor was constructed. It was founded on Au@Ni-MOF (Ni(CHCO)) hybrids, with Ni(II) (nickel acetate) serving as the precursor.
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