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Fabrication of metal-oxide nanotubes with quasi-one dimensional (Q1D) nanostructure is complex and expensive. In this work, mesoporous Al-doped SnO2 nanotubes were fabricated by a facile route of simple electrospinning. SEM and HRTEM characterizations of these nanotubes exhibited distinctive mesoporous hollow Q1D structure with 150 nm inner diameter and 250 nm outer diameter. The gas-sensing properties of the nanotubes with varying Al/Sn ratio were tested under variable temperature and formaldehyde (HCHO) concentration. At first, the gas-sensing response increased with the rise of Al amount and reached the maximum response value with the Al/(Al+Sn) ratio of 8:100. Then the response decreased with further increasing Al ratio in SnO2 nanotubes. The results indicated the novel application of electrospinning fabricated metal-oxide semiconductor nanotubes in gas-sensing field, and point towards a promising approach for improving gas response of electrospun materials.

B4.4 - Mesoporous Al-doped SnO2 nanotubes with enhanced gas-sensing properties fabricated by electrospinning