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首页> 外文期刊>RSC Advances >Ultrasensitive room-temperature ethanol detection based on Au functionalized nanoporous SnO2/C60/SnO2 composites
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Ultrasensitive room-temperature ethanol detection based on Au functionalized nanoporous SnO2/C60/SnO2 composites

机译：基于Au功能化的SnO 2 / C 60 / SnO 2 复合材料的超灵敏室温乙醇检测

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摘要

We have realized extremely sensitive, selective sub-ppm level ethanol gas detection through an Au functionalized nanoporous SnO2/C60/SnO2 sensing composite. This new type of hierarchically nanoporous SnO2 composite film supports both the Au@SnO2/C60 layer with closely packed open macropores (～300 nm) and the bottom SnO2 layer with highly ordered nanopores (8–10 nm). The structure, crystallinity and composition of the hierarchical structured Au@SnO2/C60/SnO2 nanocomposite films are characterized by XRD, Raman, HRTEM, and SAED. The interaction between the Au/SnO2 and C60/SnO2 heterojunctions in light of transfer of charge carriers and modulation of potential barriers plays a crucial role in enhancing the detecting performance. The sensing properties of the Au@SnO2/C60/SnO2 nanocomposite sensor are investigated by exposing it to ethanol gas with a concentration range from 0.5 ppm to 50 ppm. Furthermore, the gas sensor exhibits ultrahigh sensitivity to ethanol gas with a response value of up to 16.8 at 0.5 ppm and a short recovery time of 9 seconds at room temperature.
机译：我们已经通过Au功能化的纳米多孔SnO 2 / small> C 60 实现了极其灵敏的选择性亚ppm级乙醇气体检测small> / SnO 2 感应复合材料。这种新型的分层纳米多孔SnO 2 复合膜同时支持Au @ SnO 2 / C 60 层具有紧密堆积的开孔（约300 nm），底部SnO 2 层具有高度有序的纳米孔（8– 10 nm）。分层结构的Au @ SnO 2 / C 60 / SnO 的结构，结晶度和组成 2 纳米复合薄膜的特征在于XRD，拉曼，HRTEM和SAED。 Au / SnO 2 与C 60 / small / SnO 2 之间的相互作用鉴于电荷载流子的转移和势垒的调节，sub> 异质结在提高检测性能中起着至关重要的作用。 Au @ SnO 2 / C 60 / SnO 2 <通过将/ sub> 纳米复合传感器暴露于浓度范围为0.5 ppm至50 ppm的乙醇气体中进行研究。此外，该气体传感器对乙醇气体表现出超高的灵敏度，在0.5 ppm时的响应值高达16.8，在室温下的恢复时间仅为9秒。

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