CuO/SnO<SUB>2</SUB> Mixed Nanofibers for H<SUB>2</SUB>S Detection
Akash KatochJae‐Hun KimSang Sub Kim
Abstract
In this work we report the synthesis of copper oxide/tin oxide (CuO/SnO2) mixed nanofibers and their gas sensing properties in terms of H2S gas. The CuO/SnO2 mixed nanofibers were synthesized by electrospinning technique using two needles. Based on the thermogravimetric-differential thermal analysis, the calcination temperature was optimized at 700 degrees C to acquire both phases of CuO and SnO2. With this method, intermixed nanofibers of SnO2 and CuO were obtained. The sensing properties of the CuO/SnO2 mixed nanofibers to H2S are investigated as functions of operating temperature and gas concentration. The CuO/SnO2 mixed nanofibers were highly sensitive towards H2S with a response 522 for 10 ppm H2S and a response time 1 s at 300 degrees C. The semiconductor-metal transition of CuO due to H2S is likely to the reason of the high H2S response. The results evidently demonstrate that the CuO/SnO2 mixed nanofibers synthesized with double needles are a promising sensor material for detection of H2S.
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