Electrospun Granular Hollow SnO₂ Nanofibers Hydrogen Gas Sensors Operating at Low Temperatures

Abstract

In this paper, we present H 2 gas sensors based on hollow and filled, wellaligned electrospun SnO 2 nanofibers, operating at a low temperature of 150 °C. SnO 2 nanofibers with diameters ranging from 80 to 400 nm have been successfully synthesized in which the diameter of the nanofibers can be controlled by adjusting the concentration of polyacrylonitrile in the solution for electrospinning. The presence of this polymer results in the formation of granular walls for the nanofibers. We discussed the correlation between nanofibers morphology, structure, oxygen vacancy contents and the gas sensing performances. X-ray photoelectron spectroscopy analysis revealed that the granular hollow SnO 2 nanofibers, which show the highest responses, contain a significant number of oxygen vacancies, which are favorable for gas sensor operating at low temperatures.

Strategies for designing metal oxide nanostructures

“…[147][148][149]. Krishnamoorthy et al [147] developed a modified electrospinning set up with a multi-nozzle spinneret and a drum collector for the large-scale production of aligned SnO2 naonfibers.…”

The Analysis and Research for the Plate Differential Oxygen Gas Sensor of Auto Based on the Temperature Field and Thermal Stress Field

“…By 2014, it reached 154 million vehicles, and by May 2015, it had more than 162 million vehicles [21]. Since 2010, the average annual growth rate of car ownership in the country has exceeded 15% [1][2][3].A large number of cars provide convenience for people's life. At the same time, it also brings many negative effects, such as traffic accidents, energy consumption, exhaust gas and noise pollution.…”

Facile synthesis of mesoporous SnO2 microspheres using bioactive yeast cell

“…It has been studied extensively in the fields of gas sensors [1][2][3][4][5][6][7], photocatalysis [8], super capacitor [9,10] and high-capacity anode material for lithium-ion batteries [11,12]. As we all know, new structures often play an important role in deciding the properties of materials.…”

“…As we all know, new structures often play an important role in deciding the properties of materials. In order to improve the performance of SnO 2 , SnO 2 products with different structures have been successfully developed including nanoparticles [1], nanoflowers [2], nanowires [4], porous structure [5,6], hollow nanofibers [7], hollow spheres [13][14][15][16][17][18][19][20] in the past few years, and all these special structures also show unique performance. Especially, due to the hollow structure and high specific surface area, SnO 2 hollow spheres have been synthesized by template-directed synthesis [13][14][15][16][17], self-assembly [18] and hydrothermal processing [19,20].…”