High gas sensor performance of WO3 nanofibers prepared by electrospinning

•Electrospinning is a well-known technique for the synthesis of WO3 1D fibers with unique morphological properties.•WO3 nanofibers can exhibit a high gas sensor response and good selectivity toward oxidizing gases.•Gas sensors for the detection of toxic gases as NO2 are widely studied using n-type semiconductors.•Selective detection is one of the most important gas sensing properties.