Palladium modified carbonized electrospun polyacrylonitrile nanofiber for sulfur dioxide determination

Synergistic CNFs/CoS2/MoS2 Flexible Films with Unprecedented Selectivity for NO Gas at Room Temperature

“…Carbon nanofibers (CNFs) represent one of the candidate materials for flexible gas sensors owing to a number of advantages including a large specific surface area, a high aspect ratio, flexibility, and compatibility with many matured low-cost manufacturing techniques such as electrospinning and hydrothermal processes . CNFs could be modified with different materials by various physical and chemical methods, such as chemical group functionalization, conductive polymer composites, and doping of metal nanoparticles and metal oxides. , On the other hand, MoS 2 nanosheets, as the representative two-dimensional (2D) transition-metal dichalcogenides, have a large area–volume ratio and high sensitivity and selectivity . Because the density of states of multilayer MoS 2 is 3 times higher than that of single-layer sheets, multilayer MoS 2 usually shows higher current flow ability, which can be used as an integrated photosensitive and gas-sensing device.…”

“…Because the density of states of multilayer MoS 2 is 3 times higher than that of single-layer sheets, multilayer MoS 2 usually shows higher current flow ability, which can be used as an integrated photosensitive and gas-sensing device. Furthermore, many novel metal, metal oxide, and metal sulfide nanoparticles/quantum dots have been explored as sensitizers or catalysts for enhancing the sensitivity and selectivity of gas sensors. , …”

“…14 CNFs could be modified with different materials by various physical and chemical methods, such as chemical group functionalization, 9 conductive polymer composites, 15 and doping of metal nanoparticles and metal oxides. 16,17 On the other hand, MoS 2 nanosheets, as the representative two-dimensional (2D) transition-metal dichalcogenides, have a large area−volume ratio and high sensitivity and selectivity. 18 Because the density of states of multilayer MoS 2 is 3 times higher than that of single-layer sheets, multilayer MoS 2 usually shows higher current flow ability, which can be used as an integrated photosensitive and gassensing device.…”

“…Furthermore, many novel metal, metal oxide, and metal sulfide nanoparticles/quantum dots have been explored as sensitizers or catalysts for enhancing the sensitivity and selectivity of gas sensors. 16,19 Herein, a simple template strategy was developed to prepare hierarchically porous flexible composites (CNFs/CoS 2 /MoS 2 ) as gas sensors via electrospinning, heat treatment, and hydrothermal methods. The CNFs act as a flexible conductive ■ RESULTS AND DISCUSSION Synthesis and Characterization of the CNFs/CoS 2 / MoS 2 Composite Films.…”

Optimization of Working Conditions by Response Surface Methodology of Sulfur Dioxide Gas Sensors Based on Au/CoO‐2La2WO6 Nanoparticles

“…Operating the methods above is very complicated since they require not only collection and preparation of samples, but also large‐scale analytical instruments. Many techniques, such as solid electrolyte, fluorescence, nanomaterials, optoelectronic fiber, ion mobility, electrochemiluminescence (ECL), ion‐exchange membrane, photoacoustic spectroscopy, colorimetric visual detection, [43] and functional polymer [44] have been used to study the rapid measurement of sulfur dioxide. Cataluminescence (CTL), a kind of luminescence emitted from heterogeneous catalytic oxidation reactions on gas‐solid interface, is a promising technology for making gas sensors .…”