当前位置: X-MOL 学术J. Mater. Sci. Mater. Electron. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Improved ethanol gas-sensing properties of optimum Fe–ZnO mesoporous nanoparticles
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-01-10 , DOI: 10.1007/s10854-019-02852-2
Yue Shen , Qinyi Li , Tai Li , Meng Cao , Feng Gu , Linjun Wang , Da-Ming Zhu

Abstract

Fe-doped ZnO (Fe–ZnO) mesoporous nanoparticles have been synthesized via a facile hydrothermal method, which utilizes pluronic triblock copolymer polyethylene glycol–polypropylene glycol–polyethylene glycol (PEO-PPO-PEO) as the pore-forming agent. Fe–ZnO composites have an unique porous structure. Their pore sizes increase with Fe-doping concentration and reach a maximum as Fe concentration is 15 at.%; the specific surface area of synthesized mesoporous Fe–ZnO nanoparticles reaches a maximum as the Fe concentration is about 11 at.%. Electron microscopy, vapor pressure isotherm measurements and photoluminescence (PL) were used to characterize synthesized Fe–ZnO composites. Fe–ZnO-based gas sensors exhibit excellent response in detecting ethanol; the sensing response of Fe(11 at.%)–ZnO reaches 319.8, which is significantly higher than most of the ZnO-based gaseous sensors. The improved sensitivity is ascribed to the increase of oxygen-related defects and specific surface area of Fe–ZnO composites.



中文翻译:

最佳Fe-ZnO介孔纳米粒子的乙醇气敏特性改善

摘要

掺铁的ZnO(Fe–ZnO)介孔纳米粒子是通过简便的水热方法合成的,该方法利用普朗尼克三嵌段共聚物聚乙二醇–聚丙二醇–聚乙二醇(PEO-PPO-PEO)作为成孔剂。Fe-ZnO复合材料具有独特的多孔结构。它们的孔径随Fe掺杂浓度的增加而增加,并在Fe浓度为15 at。%时达到最大值。当Fe浓度约为11 at。%时,合成的中孔Fe-ZnO纳米粒子的比表面积达到最大值。电子显微镜,蒸气压等温线测量和光致发光(PL)用于表征合成的Fe–ZnO复合材料。基于Fe–ZnO的气体传感器在检测乙醇中表现出出色的响应;Fe(11 at。%)– ZnO的传感响应达到319.8,远高于大多数基于ZnO的气态传感器。灵敏度的提高归因于与氧有关的缺陷和Fe-ZnO复合材料比表面积的增加。

更新日期:2020-01-11
down
wechat
bug