Directly electrospinning submillimeter continuous fibers on tubes to fabricate H2S detectors with fast and high response

Abstract

The fast and high response detection of neurotoxic H 2 S is of great importance for the environment. In this paper, directly electrospinning technology on the ceramic tube is developed to improve the response of H 2 S detector based on superlong SnO 2 fibers. The submillimeter continuous fibers are deposited directly on ceramic tubes by in-situ electrospinning method and can keep morphology of fibers during calcination. By employing this technology, CuO-doped SnO 2 fiber H 2 S detectors are fabricated, and 10% atom CuO-doped SnO 2 H 2 S detector shows the highest response of 40 toward 1 ​ppm ​H 2 S at 150 ​°C while the response is only 3.6 for the H 2 S detector prepared in traditional route. In addition, the in-situ electrospinning H 2 S detectors show faster response and recovery compared to the H 2 S detectors fabricated by the conventional way. The high and fast response of H 2 S detectors based on in-situ electrospinning can be ascribed to the continuous fiber structure and CuO modification. The present in-situ electrospinning technology may provide a new strategy for the development of other gas-detectors and bio-detectors with fast and high response.