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 H₂S is of great importance for the environment. In this paper, directly electrospinning technology on the ceramic tube is developed to improve the response of H₂S detector based on superlong SnO₂ 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 SnO₂ fiber H₂S detectors are fabricated, and 10% atom CuO-doped SnO₂ H₂S detector shows the highest response of 40 toward 1 ​ppm ​H₂S at 150 ​°C while the response is only 3.6 for the H₂S detector prepared in traditional route. In addition, the in-situ electrospinning H₂S detectors show faster response and recovery compared to the H₂S detectors fabricated by the conventional way. The high and fast response of H₂S 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.