Preparation of Yb-doped SnO2 hollow nanofibers with an enhanced ethanol–gas sensing performance by electrospinning

DFT calculation and analysis of the gas sensing mechanism of methoxy propanol on Ag decorated SnO2 (110) surface

“…On the other hand, doping with noble metals is an efficient way to improve the gas sensing properties of pure SnO 2 , for which Ag is an excellent candidate. [13][14][15][16] Although it is well known that Ag can improve the gas sensing performance of SnO 2 , the enhancement mechanism remains unclear. It has been generally ascribed to a catalytic effect; however, the atomic conguration and chemical environment at the material surface, which might have a strong effect on the sensing properties, are hard to characterize, hence posing an essential challenge to the understanding of the gas sensing mechanism of the Ag/SnO 2 system.…”

2D SnO2 Nanosheets: Synthesis, Characterization, Structures, and Excellent Sensing Performance to Ethylene Glycol

“…As a classic gas-sensing material, SnO 2 has been widely used in gas sensors due its lower cost, higher chemical sensitivity, faster gas response, and good stability. Generally, SnO 2 displays excellent gas sensing properties to volatile organic compound vapors and toxic gases, such as isopropanol [ 5 ], ethanol [ 10 ], ammonia [ 11 ], formaldehyde [ 12 ], and so on. However, there are still some problems that need to be solved for SnO 2 gas sensors, such as the poor selectivity, slow response or recovery speed, and lower response.…”

“…As is well known, many factors, such as grain size, microstructures, morphologies, and so on, all have a great influence on the gas-sensing performance of SnO 2 sensors [ 13 ]. Recently, SnO 2 , with various nanostructures and morphologies, including nanoparticles [ 14 ], nanosheets [ 1 ], nanowires [ 15 ], nanorods [ 16 ], nanofibers [ 10 ], nanospheres [ 17 ], and nanofilms [ 18 ], have been developed to investigate the effects of the structure and morphology on the gas-sensing performance. Among them, nanosheets have aroused people’s interest because of the large and continuous surface which provides a higher specific surface and contains an abundance of active sites which are a benefit to physical and chemical adsorption.…”

The Effect of Eu Doping on Microstructure, Morphology and Methanal-Sensing Performance of Highly Ordered SnO2 Nanorods Array

“…In recent years, many surveys have shown that the rare earth elements doped into the metal oxide structure can overcome disadvantages and improve the gas response, such as poor sensitivity and selectivity of sensors [31]. The effects of doping La [32], Yb [33], Pr [34], Ce [35], and Sm [36] have been reported, which indicate positive effect on enhancing gas sensing of SnO 2 nanomaterials. Europium ion with 4f 7 electronic configuration usually exists in the form of triply ionized ion (Eu 3+ ) [37], which shows fast oxygen ion mobility and predominant catalytic properties.…”