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Reduced Graphene Oxide-Coated Si Nanowires for Highly Sensitive and Selective Detection of Indoor Formaldehyde
Song, Longfei1,2,3; Luo, Linqu1,2; Xi, Yan1,2; Song, Jianjun1,2; Wang, Ying3; Yang, Liping3,4; Wang, Anqi3; Chen, Yunfa3,4; Han, Ning3,4; Wang, Fengyun1,2,5
2019-03-14
Source PublicationNANOSCALE RESEARCH LETTERS
ISSN1931-7573
Volume14Pages:9
AbstractAlthough 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.
KeywordSi nanowires Reduced graphene oxide Sensitivity Selectivity Formaldehyde
DOI10.1186/s11671-019-2921-2
Language英语
WOS KeywordZEOLITIC IMIDAZOLATE FRAMEWORK ; GAS SENSOR ; SENSING PROPERTIES ; NANOFIBERS ; NANOPARTICLES ; FABRICATION ; DIAGNOSIS ; NANOCUBES ; MIXTURES ; FILM
Funding ProjectNational 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 Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational 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
WOS IDWOS:000461353500004
PublisherSPRINGEROPEN
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/27525
Collection中国科学院过程工程研究所
Corresponding AuthorHan, Ning; Wang, Fengyun
Affiliation1.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
Recommended Citation
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.
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