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N-type SnO2 nanosheets standing on p-type carbon nanofibers: a novel hierarchical nanostructures based hydrogen sensor

机译：站在p型碳纳米纤维上的N型SnO2纳米片：基于氢的传感器的新型分层纳米结构

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Highly-efficient chemical sensors based on various nanostructures have attracted considerable attention owing to their practical applications in industry and in the daily lives of human beings. One of the most interesting and urgent challenges is to synthesize hierarchical heterostructured nanomaterials with high performance. In this paper, hierarchical p-n junction nanostructures made of n-type SnO2 nanosheets standing on p-type carbon nanofibers have been successfully fabricated by combining electrospinning technique and hydrothermal method. The morphologies of the SnO2 nanosheets can be easily controlled through tuning the experimental conditions such as hydrothermal reaction time. The gas sensing performances based on the hierarchical nanostructures with hydrogen as target molecule have been evaluated. The expected sensing performances (e.g., low operating temperature, large response and fast response-recovery behaviors) have been achieved owing to the synergistic effect between SnO2 nanosheets, CNFs and the well-defined shaped hybrid nanostructures.
机译：由于其在工业和人类日常生活中的实际应用，基于各种纳米结构的高效化学传感器已引起了相当大的关注。最有趣和紧迫的挑战之一是合成具有高性能的分层异质结构纳米材料。本文结合电纺技术和水热法成功地制备了由站立在p型碳纳米纤维上的n型SnO2纳米片构成的分层p-n结纳米结构。通过调整实验条件（例如水热反应时间），可以轻松控制SnO2纳米片的形貌。已经评估了基于以氢为目标分子的分层纳米结构的气体传感性能。由于SnO2纳米片，CNF和形状明确的杂化纳米结构之间的协同效应，已经实现了预期的传感性能（例如，较低的工作温度，较大的响应和快速的响应恢复行为）。

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