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C-doped and N-doped reduced graphene oxide/TiO2 composites with exposed (001) and (101) facets controllably synthesized by a hydrothermal route and their gas sensing characteristics

文献类型：期刊论文

作者Yan, Wen-Yuan1; Zhou, Qi1; Chen, Xing1,2; Huang, Xing-Jiu2; Wu, Yu-Cheng1,3
刊名SENSORS AND ACTUATORS B-CHEMICAL
出版日期2016-07-01
卷号230期号:无页码:761-772
关键词Tio2 Nanocrystals Nitrogen Doping Reduced Graphene Oxide Isopropanol Gas Sensing
DOI10.1016/j.snb.2016.02.133
文献子类Article
英文摘要Element doping and controllably facet exposing are efficient solutions for enhancing gas sensing performances of TiO2 nanomaterials. In this study, C-doped and N-doped reduced graphene oxide/TiO2 composites with special exposed facets C-RGO/TiO2 (with HF) and N-RGO/TiO2 (with HF) were controllably synthesized via a hydrothermal method using HF as the morphology-controlling agent at 180 degrees C for 12 h. The as-prepared composites were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and other measurements. Their gas sensing results demonstrate that the gas sensing performance of N-RGO/TiO2 (with HF) is much better than that of C-RGO/TiO2 (with HF), such as higher sensitivity, and shorter response and recovery time. The sensor based on N-RGO/TiO2 (with HF) exhibits the highest gas response toward isopropanol, ethanol, and acetone at a working temperature of 210, 240, and 270 degrees C, respectively. The lowest detection of these gases was 1 ppm. The gas sensing mechanism was also carefully analyzed. The TiO2 particles of composite with exposed facets generate electron-hole pairs efficiently. The N element dopant plays the roles of narrowing the band gap of TiO2 based composite, and strengthening the chemical binding between N-RGO and TiO2, which is of benefit to charge separation and electron mobility. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词ANATASE TIO2 ; PHOTOCATALYTIC ACTIVITY ; IN-SITU ; SENSORS ; SINGLE ; NANOPARTICLES ; REDUCTION ; HYDROGEN ; PD ; NANOCOMPOSITE
WOS研究方向Chemistry ; Electrochemistry ; Instruments & Instrumentation
语种英语
WOS记录号WOS:000374329300097
资助机构National Natural Science Foundation of China(51202052 ; National Natural Science Foundation of China(51202052 ; National Natural Science Foundation of China(51202052 ; National Natural Science Foundation of China(51202052 ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; 21377131) ; 21377131) ; 21377131) ; 21377131) ; National Natural Science Foundation of China(51202052 ; National Natural Science Foundation of China(51202052 ; National Natural Science Foundation of China(51202052 ; National Natural Science Foundation of China(51202052 ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Natural Sciences Foundation of Anhui Province(1308085QE87) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure(SKL201312SIC) ; 21377131) ; 21377131) ; 21377131) ; 21377131)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/22378]  
专题合肥物质科学研究院_中科院合肥智能机械研究所
作者单位1.Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China
2.Chinese Acad Sci, Inst Intelligent Machines, Lab Nanomat & Environm Detect, Hefei 230031, Peoples R China
3.Anhui Key Lab Adv Funct Mat & Devices, Hefei 230009, Peoples R China
推荐引用方式
GB/T 7714		 Yan, Wen-Yuan,Zhou, Qi,Chen, Xing,et al. C-doped and N-doped reduced graphene oxide/TiO2 composites with exposed (001) and (101) facets controllably synthesized by a hydrothermal route and their gas sensing characteristics[J]. SENSORS AND ACTUATORS B-CHEMICAL,2016,230(无):761-772.
APA Yan, Wen-Yuan,Zhou, Qi,Chen, Xing,Huang, Xing-Jiu,&Wu, Yu-Cheng.(2016).C-doped and N-doped reduced graphene oxide/TiO2 composites with exposed (001) and (101) facets controllably synthesized by a hydrothermal route and their gas sensing characteristics.SENSORS AND ACTUATORS B-CHEMICAL,230(无),761-772.
MLA Yan, Wen-Yuan,et al."C-doped and N-doped reduced graphene oxide/TiO2 composites with exposed (001) and (101) facets controllably synthesized by a hydrothermal route and their gas sensing characteristics".SENSORS AND ACTUATORS B-CHEMICAL 230.无(2016):761-772.

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来源：合肥物质科学研究院

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