Reduced Graphene Oxide-Coated Si Nanowires for Highly Sensitive and Selective Detection of Indoor Formaldehyde

doi:10.1186/s11671-019-2921-2

	Reduced Graphene Oxide-Coated Si Nanowires for Highly Sensitive and Selective Detection of Indoor Formaldehyde
	Song, Longfei 1,2,3; Luo, Linqu 1,2; Xi, Yan 1,2; Song, Jianjun 1,2; Wang, Ying 3; Yang, Liping 3,4; Wang, Anqi 3; Chen, Yunfa 3,4; Han, Ning 3,4; Wang, Fengyun 1,2,5
刊名	NANOSCALE RESEARCH LETTERS
	2019-03-14
卷号	14 页码:9
关键词	Si nanowires Reduced graphene oxide Sensitivity Selectivity Formaldehyde
ISSN号	1931-7573
DOI	10.1186/s11671-019-2921-2
英文摘要	Although significant developments have been made in the low-concentration formaldehyde monitoring in indoor air by using gas sensors, they still suffer from insufficient performance for achieving ppb-level detection. In this work, <100> oriented Si nanowires (SiNWs) with high specific surface area were prepared via metal-assisted chemical etching method (MACE), and then were uniformly coated with graphene oxide (GO) followed by the subsequent reductive process in H-2/Ar atmosphere at 800 degrees C to obtain reduced graphene oxide (RGO). The RGO coating (RGO@n-SiNWs) obviously enhances SiNWs sensitivity to low-concentration formaldehyde, benefiting from the increased specific surface area, the sensitization effect of RGO, and the formation of p-n junction between SiNWs and RGO. Specifically, RGO@n-SiNWs exhibits a high response of 6.4 to 10ppm formaldehyde at 300 degrees C, which is about 2.6 times higher than that of pristine SiNWs (2.5). Furthermore, the RGO@n-SiNWs show a high response of 2.4 to 0.1ppm formaldehyde which is the largest permissive concentration in indoor air, a low detection limit of 35ppb obtained by non-linear fitting, and fast response/recovery times of 30 and 10s. In the meanwhile, the sensor also shows high selectivity over other typical interfering gases such as ethanol, acetone, ammonia, methanol, xylene, and toluene, and shows a high stability over a measurement period of 6days. These results enable the highly sensitive, selective, and stable detection of low-concentration formaldehyde to guarantee safety of indoor environment.
资助项目	National Key R&D Program of China[2016YFC0207100] ; Natural Science Foundation of Shandong Province, China[ZR2018JL021] ; Natural Science Foundation of Shandong Province, China[ZR2014EMQ011] ; National Natural Science Foundation of China[51402160] ; National Natural Science Foundation of China[51602314] ; Taishan Scholar Program of Shandong Province, China ; Opening Project of Key Laboratory of Microelectronic Devices and Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences
WOS关键词	ZEOLITIC IMIDAZOLATE FRAMEWORK ; GAS SENSOR ; SENSING PROPERTIES ; NANOFIBERS ; NANOPARTICLES ; FABRICATION ; DIAGNOSIS ; NANOCUBES ; MIXTURES ; FILM
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	SPRINGEROPEN
WOS记录号	WOS:000461353500004
资助机构	National Key R&D Program of China ; Natural Science Foundation of Shandong Province, China ; National Natural Science Foundation of China ; Taishan Scholar Program of Shandong Province, China ; Opening Project of Key Laboratory of Microelectronic Devices and Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/27524]
专题	中国科学院过程工程研究所
通讯作者	Han, Ning; Wang, Fengyun
作者单位	1.Qingdao Univ, Coll Phys, Qingdao 266071, Peoples R China 2.Qingdao Univ, State Key Lab Bio Fibers & Ecotext, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 5.Chinese Acad Sci, Inst Microelect, Key Lab Microelect Devices & Integrated Technol, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Song, Longfei,Luo, Linqu,Xi, Yan,et al. Reduced Graphene Oxide-Coated Si Nanowires for Highly Sensitive and Selective Detection of Indoor Formaldehyde[J]. NANOSCALE RESEARCH LETTERS,2019,14:9.
APA	Song, Longfei.,Luo, Linqu.,Xi, Yan.,Song, Jianjun.,Wang, Ying.,...&Wang, Fengyun.(2019).Reduced Graphene Oxide-Coated Si Nanowires for Highly Sensitive and Selective Detection of Indoor Formaldehyde.NANOSCALE RESEARCH LETTERS,14,9.
MLA	Song, Longfei,et al."Reduced Graphene Oxide-Coated Si Nanowires for Highly Sensitive and Selective Detection of Indoor Formaldehyde".NANOSCALE RESEARCH LETTERS 14(2019):9.