Green Synthesis of Ni-SnO2 Nanoparticles for Improved Gas Sensing Applications
摘要
This study explores the synthesis of SnO2 Nanoparticles (NPs) using eco-friendly methods and evaluates their efficacy in sensing sulfur dioxide (SO2). Citrus sinensis was used to prepare bare and Ni-incorporated SnO2 nanoparticles, which were then thoroughly tested for their ability to sense SO2 gas. The tetragonal rutile phase and nanocrystalline structure of the SnO2 particles were verified by X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy. UV–Visible spectroscopy observations supported the creation of many defects and oxygen vacancies inside the SnO2 structure, as well as the presence of Ni incorporation. The synthesized nanoparticles were spin-coated onto gold interdigitated electrodes to create sensors for gas sensing measurements, at different temperatures. The sensors parameters including response time and recovery time towards 100 ppm of sulphur dioxide (SO2) were found to be greatly improved for 2% Ni doped SnO2 sensor. Bare SnO2 and Ni-incorporated SnO2 sensors exhibit the comparatively similar sensing response of 2.35% and 2.18% at an operating temperature of 100 °C towards 100 ppm of SO2 gas respectively. Ni-incorporated SnO2 sensor shows the improved response time of 142.10 s and recovery time of 50.86 s as compared to bare SnO2 sensor. This study highlights the potential of Ni-incorporated SnO2 nanoparticles, synthesized through an environmentally friendly method, for advanced gas sensing applications.