The solvothermal synthesis of the cobweb-like WO3 and its enhanced gas-sensing property

摘要

Owing to the slenderness of the single spider silk and the fluffy arrangement of numerous monomers, the cobweb has the sufficient contact with the water vapor in air and can form dewdrops on it. Enlightened by this, WO3 nanowires with a great length-diameter ratio and a non-compact assembly are inferred to possess an excellent gas-sensing property. As a proof-of-concept, the cobweb-like WO3 was firstly synthesized through a facile solvothermal method using the water-ethanol mixed solution. The subsequent gas-sensing measurements testified this kind of cobweb-like WO3 indeed displays an enhanced sensitivity towards the ethanol at a relatively low temperature. (C) 2016 Elsevier B.V. All rights reserved.