Excellent long-term stable H2S gas sensor based on Nb2O5/SnO2 core-shell heterostructure nanorods

Ni-doped Al2O3 sensor for effective SO3 gas adsorption and sensing

“…High temperatures lead to the desorption of oxygen species and stifles the reaction of gas molecules and the surface due to the high activation energy. 16 Among the three sensors, the high Ni-doped sensor showed a higher response of 77.14 towards 20 ppm at 90 °C. Also, a sensor response of 48.38 was observed at room temperature.…”

“…Hence, altering the surface area and morphology could improve the performance of alumina in its adsorption applications (gas sensing). 16 Nickel (Ni) has certain properties that are beneficial to sensor application, such as low-humidity and catalytic nature. Moreover, Ni interacts with oxygen vacancies and shows an enhanced adsorption of oxygen species.…”

Nanoscale Ag-Decorated Hollow Porous CuO/SnO2 Heterojunctions for Isopropanol Detection

“…Furthermore, when the MOS are in contact with the noble metals, a Schottky barrier forms at the heterogeneous interfaces. − The catalytic effect of noble metals can enhance the activity of chemical reactions, reduce the operating temperature, and improve the sensitivity of gas sensors. − Thus, fabricating sensors with excellent performance by combing multiple heterojunctions with the 3D hierarchical architectures is necessary. Many p-n SnO 2 -based heterojunction sensors and noble metal-loaded n-n SnO 2 -based heterojunction sensors have been extensively investigated, and exciting results have been obtained. ,,− However, studies on Ag-decorated p-CuO/n-SnO 2 heterojunctions combined with the coralloid hollow porous structure (HPs) are relatively rare, especially for IPA.…”

Surface Enhancement Effects of Tiny SnO2 Nanoparticle Modification on α-Fe2O3 for Room-Temperature NH3 Sensing

“…Standard gas detection methods, such as chromatography, mass spectrometry, and optical sensors, often involve complex instruments and high detection costs. , In contrast, resistive semiconductor sensors offer several advantages, including high efficiency, low cost, fast response, and small size, making them highly desirable for gas detection applications. − Semiconductor metal oxides are widely utilized as sensitive materials in the manufacture of resistive gas sensors due to their simple structure, flexibility in manufacturing, and cost effectiveness. − However, a significant drawback is their requirement of high operating temperatures, typically ranging from 200 to 500 °C, leading to increased power consumption. − Therefore, there is a pressing need for gas sensors that exhibit high sensitivity to target gases at room temperature. One promising semiconductor metal oxide is α-Fe 2 O 3 , which exhibits excellent stability and possesses a band gap of 2.2 eV. , It has received widespread attention and research due to its low cost, excellent thermal stability, and adjustable active sites.…”