DICP OpenIR
Mesoporous InN/In2O3 heterojunction with improved sensitivity and selectivity for room temperature NO2 gas sensing
Qu, Fengdong1; Lu, Honghong1; Guarecuco, Rohiverth2; Jiao, Yutong1; Yang, Minghui1
KeywordInn/in2o3 Heterojunction No2 Room Temperature Gas Sensor
Source PublicationNANOTECHNOLOGY
2016-09-23
DOI10.1088/0957-4484/27/38/385501
Volume27Issue:38
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordSOLAR-CELLS ; OPTICAL-PROPERTIES ; GRAPHENE OXIDE ; SENSORS ; INDIUM ; LAYER ; PERFORMANCE ; NANOWIRES ; ARRAYS ; NANOPARTICLES
AbstractEstablishing heterostructures is a good strategy to improve gas sensing performance, and has been studied extensively. In this work, mesoporous InN/In2O3 composite (InNOCs) heterostructures were prepared through a simple two-step strategy involving hydrothermal synthesis of In2O3 and subsequent nitriding into InN-composite In2O3 heterostructures. We found that the InN content has great influence on the resistance of InNOCs, and thus, the gas sensing performance. In particular, InNOC-36.9 (with InN content of 36.9% in the composites) shows an excellent sensing response towards different concentrations of NO2, as well as good stability after one week of exposure to 200 ppb NO2 at room temperature. The highest sensing response (Delta R/R-0) is up to 1.8 for the low NO2 concentration of 5 ppb. Even more significantly, the theoretical limit of detection (LOD) of the InNOC-36.9 sensor is 31.7 ppt based on a signal-to- noise ratio of 3 (the measured LOD is 5 ppb), which is far below the US NAAQS. value (NO2: 53 ppb). In addition, a rational band structure model combined with a surface reaction model is proposed to explain the sensing mechanism.
Language英语
WOS IDWOS:000400056900001
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/151959
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.MIT, Dept Chem Engn, Cambridge, MA 02139 USA
Recommended Citation
GB/T 7714
Qu, Fengdong,Lu, Honghong,Guarecuco, Rohiverth,et al. Mesoporous InN/In2O3 heterojunction with improved sensitivity and selectivity for room temperature NO2 gas sensing[J]. NANOTECHNOLOGY,2016,27(38).
APA Qu, Fengdong,Lu, Honghong,Guarecuco, Rohiverth,Jiao, Yutong,&Yang, Minghui.(2016).Mesoporous InN/In2O3 heterojunction with improved sensitivity and selectivity for room temperature NO2 gas sensing.NANOTECHNOLOGY,27(38).
MLA Qu, Fengdong,et al."Mesoporous InN/In2O3 heterojunction with improved sensitivity and selectivity for room temperature NO2 gas sensing".NANOTECHNOLOGY 27.38(2016).
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