MOF-derived α-Fe2O3 porous spindle combined with reduced graphene oxide for improvement of TEA sensing performance

被引:90
|
作者
Wei, Qi [1 ]
Sun, Jing [1 ]
Song, Peng [1 ]
Li, Jia [1 ]
Yang, Zhongxi [1 ]
Wang, Qi [1 ]
机构
[1] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Shandong, Peoples R China
来源
基金
中国国家自然科学基金;
关键词
Metal organic frameworks; alpha-Fe2O3; spindles; Reduced graphene oxide nanocomposite; Heterojunction; Gas sensor; METAL-ORGANIC FRAMEWORKS; TIN OXIDE; GAS; HOLLOW; SENSOR; NANOSTRUCTURES; COMPOSITE; NANOCOMPOSITES; FABRICATION; NANOFIBERS;
D O I
10.1016/j.snb.2019.127306
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Recently, metal organic frameworks (MOFs) received more and more attentions in gas sensors due to their characterizations of well-defined morphologies and open-metal sites. Here, pure alpha-Fe2O3 spindles were prepared by using the Fe-MIL-88 as precursor and the product was successfully combined with 1 wt% reduced graphene oxide (rGO) through a simple solvothermal method. The element compositions and microstructures were characterized by a series of techniques. According to the consequences, pure alpha-Fe2O3 spindles exhibited porous nanostructures and were adhered adequately on the surface of rGO. And the length-width ratio of most a-Fe2O3 spindles is about 4:1. Furthermore, the sensor based on rGO/alpha-Fe2O3 nanocomposites displayed better gas sensing performances than pure alpha-Fe2O3 spindles and the sensitivity increased from 12.18 to 34.33 towards 100 ppm triethylamine (TEA) at 300 degrees C. At the same time, rGO/alpha-F(e)2O(3) nanocomposites also possessed superior selectivity and short response/recover times. The enhanced sensors performance can be ascribed to the porous nanostructures and P/N heterojunction between alpha-Fe2O3 and rGO.
引用
收藏
页数:10
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