Enhanced Optical Sensing of Butanone Gas Using CuOHF Nanosheet-Modified Fiber Optic Evanescent-Wave Absorption Sensor

This article introduces a groundbreaking optical fiber sensor designed for the efficient detection of butanone gas. Leveraging copper hydroxyl fluoride (CuOHF) as a highly sensitive material, the sensor exploits evanescent-wave absorption and interference effects within the optical fiber. Experimental outcomes reveal the exceptional performance of the CuOHF fiber optic sensor. Pioneering the use of hydroxyfluoride in fiber optic sensors, especially for butanone gas detection, the CuOHF sensor boasts a high sensitivity of 0.0018 dB/ppm, reliably detecting concentrations as low as 1 ppm. The sensor exhibits rapid response and recovery times, coupled with good selectivity. The abundance of hydroxyl groups on the CuOHF surface enhances interactions with butanone gas molecules. The low electron affinity of fluorine augments surface adsorption stability, while interfacial effects facilitate efficient optical signal transmission. The high reactivity of the sensor ensures efficient and rapid adsorption and desorption of butanone gas molecules. The study underscores the novelty and potential of CuOHF fiber optic sensors in butanone gas detection, providing a dependable solution for precise monitoring. The success of this research holds significance for advancing a broader spectrum of applications in fiber optic sensing and gas detection within the realm of optics.