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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
关键词Inn/in2o3 Heterojunction No2 Room Temperature Gas Sensor
刊名NANOTECHNOLOGY
2016-09-23
DOI10.1088/0957-4484/27/38/385501
27期:38
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology ; Physical Sciences
类目[WOS]Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]SOLAR-CELLS ; OPTICAL-PROPERTIES ; GRAPHENE OXIDE ; SENSORS ; INDIUM ; LAYER ; PERFORMANCE ; NANOWIRES ; ARRAYS ; NANOPARTICLES
英文摘要Establishing 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.
语种英语
WOS记录号WOS:000400056900001
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/151959
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.MIT, Dept Chem Engn, Cambridge, MA 02139 USA
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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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