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论文类型：期刊论文

发表时间：2017-08-01

发表刊物：SENSORS

收录刊物：Scopus、SCIE、EI、PubMed

卷号：17

期号：8

ISSN号：1424-8220

关键字：electrospinning; composite hetero-nanofibers; homotype heterojunction; indoor volatile organic gases; gas sensing properties; gas sensing mechanism

摘要：In2O3/SnO2 composite hetero-nanofibers were synthesized by an electrospinning technique for detecting indoor volatile organic gases. The physical and chemical properties of In2O3/SnO2 hetero-nanofibers were characterized and analyzed by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), Energy Dispersive X-Ray Spectroscopy (EDX), specific surface Brunauer-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS). Gas sensing properties of In2O3/SnO2 composite hetero-nanofibers were measured with six kinds of indoor volatile organic gases in concentration range of 0.5-50 ppm at the operating temperature of 275 degrees C. The In2O3/SnO2 composite hetero-nanofibers sensor exhibited good formaldehyde sensing properties, which would be attributed to the formation of n-n homotype heterojunction in the In2O3/SnO2 composite hetero-nanofibers. Finally, the sensing mechanism of the In2O3/SnO2 composite hetero-nanofibers was analyzed based on the energy-band principle.