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Enhanced ethanol sensing performances of hetero-assembly Zn1-xFexO/rGO nanocomposites
Sensors and Actuators B: Chemical ( IF 8.0 ) Pub Date : 2020-04-03 , DOI: 10.1016/j.snb.2020.128032
Qinyi Li , Yue Shen , Tai Li , Meng Cao , Feng Gu , Linjun Wang

Nanocomposites of Zn1-xFexO/reduced graphene oxide (Zn1-xFexO/rGO, x = 0∼0.15) with carpet-like mesoporous structures have been simply synthesized via a low temperature hydrothermal method. FESEM and TEM results show that the hetero-assembly trend of Zn1-xFexO and rGO is much more striking than that of Zn1-xFexO self-assembly at 100 °C hydrothermal condition. The specific surface area and pore size tests indicate that rGO leads to the formation of slit holes with inclined panel structure, providing a large specific surface area for the nanocomposites. Mesoporous Zn0.89Fe0.11O has been proved to have the optimal gas response to ethanol at high operating temperatures, while Zn0.89Fe0.11O/rGO-10 (the content of rGO is 10 %) composite has a remarkable gas response (4.37) at low operating temperature and low ethanol concentration (160 °C, 2 ppm). In addition, the charge transport process and potential mechanism of gas response enhancement of Zn1-xFexO/rGO composite have been discussed in detail, and this may be ascribed to the combined effect of P-N junctions and the interfacial coupling between Zn1-xFexO and rGO.



中文翻译:

异质组装Zn 1-x Fe x O / rGO纳米复合材料的乙醇感测性能增强

采用低温水热法简单地合成了具有地毯状介孔结构的Zn 1-x Fe x O /还原石墨烯纳米复合物(Zn 1-x Fe x O / rGO,x = 0〜0.15)。FESEM和TEM结果表明,在100°C水热条件下,Zn 1-x Fe x O和rGO的异质组装趋势要比Zn 1-x Fe x O自组装的异质组装趋势更为明显。比表面积和孔径测试表明rGO导致形成具有倾斜面板结构的狭缝孔,从而为纳米复合材料提供了较大的比表面积。介孔锌0.890.11已证明O在高温下对乙醇具有最佳的气体响应,而Zn 0.89 Fe 0.11 O / rGO-10(rGO的含量为10%)复合材料在低温下对气体具有出色的气体响应(4.37)。低乙醇浓度(160°C,2 ppm)。此外,还详细讨论了Zn 1-x Fe x O / rGO复合材料的电荷传输过程和增强气体响应的潜在机理,这可能归因于PN结和Zn 1之间的界面耦合的共同作用。-x Fe x O和rGO。

更新日期:2020-04-03
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