α-MnO2 Nanowires as Potential Scaffolds for a High-Performance Formaldehyde Gas Sensor Device
Source abstract
Abstract
Herein, we report a chemi-resistive sensing method for the detection of formaldehyde (HCHO) gas. For this, α-MnO2 nanowires were synthesized hydrothermally and examined for ascertaining their chemical composition, crystal phase, morphology, purity, and vibrational properties. The XRD pattern confirmed the high crystallinity and purity of the α-MnO2 nanowires. FESEM images confirmed a random orientation and smooth-surfaced wire-shaped morphologies for as-synthesized α-MnO2 nanowires. Further, the synthesized nanowires with rounded tips had a uniform diameter throughout the length of the nanowires. The average diameter of the α-MnO2 nanowires was found to be 62.18 nm and the average length was ~2.0 μm. Further, at an optimized temperature of 300 °C, the fabricated HCHO sensor based on α-MnO2 nanowires demonstrated gas response, response, and recovery times of 19.37, 18, and 30 s, respectively.
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Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Chemical Sensor Technologies · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 11001, Saudi Arabia
Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Saudi Arabia
Department of Chemistry, Jagdish Chandra DAV College Dasuya, Punjab 144205, India
Department of Electrical Engineering, Najran University, Najran 11001, Saudi Arabia
Department of Physics, Faculty of Science and Arts, Najran University, Najran 11001, Saudi Arabia
Department of Physics, College of Science, King Faisal University, Hofuf 31982, Saudi Arabia
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
New & Renewable Energy Material Development Center (NewREC), Jeonbuk National University, Jeonbuk 56332, Korea
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