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Sensitive, Selective, and Fast Detection of ppb-Level H2S Gas Boosted by ZnO-CuO Mesocrystal
Guo, YN (Guo, Yanan)[ 1 ]; Gong, MM (Gong, Miaomiao)[ 1,2 ]; Li, YS (Li, Yushu)[ 1 ]; Liu, YL (Liu, Yunling)[ 3 ]; Dou, XC (Dou, Xincun)[ 1 ]
2016
Source PublicationNANOSCALE RESEARCH LETTERS
ISSN1556-276X
Volume11Issue:10Pages:1-9
Abstract

ZnO-CuO mesocrystal was prepared via topotactic transformation using one-step direct annealing of aqueous precursor solution and assembled into a H2S sensor. The ZnO-CuO mesocrystal-based sensor possesses good linearity and high sensitivity in the low-concentration range (10-200 ppb). Compared to pure CuO, the as-prepared ZnO-CuO mesocrystal sensor exhibited superior H2S sensing performance with a response ranging from 8.6 to 152 % towards H2S concentrations from 10 ppb to 10 ppm when applied at the optimized working temperature of 125 degrees C. The sensor showed excellent repeatability and good selectivity towards H2S gas even at a concentration four orders of magnitude lower than the interfering gases, such as H-2, CO2, CO, NO2, acetone, and NH3. The improved sensitivity could be attributed partially to the effective diffusion of analyte gas through the mesocrystal surface and the abundant accessible active sites. Moreover, the nanoscale p-n junctions within the mesocrystal, which could effectively manipulate the local charge carrier concentration, are also beneficial to boost the sensing performance.

KeywordMesocrystal p-n junction Gas sensor ppb H2S detection
DOI10.1186/s11671-016-1688-y
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/7112
Collection环境科学与技术研究室
Corresponding AuthorGuo, YN (Guo, Yanan)[ 1 ]; Dou, XC (Dou, Xincun)[ 1 ]
Affiliation1.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China
Recommended Citation
GB/T 7714
Guo, YN ,Gong, MM ,Li, YS ,et al. Sensitive, Selective, and Fast Detection of ppb-Level H2S Gas Boosted by ZnO-CuO Mesocrystal[J]. NANOSCALE RESEARCH LETTERS,2016,11(10):1-9.
APA Guo, YN ,Gong, MM ,Li, YS ,Liu, YL ,&Dou, XC .(2016).Sensitive, Selective, and Fast Detection of ppb-Level H2S Gas Boosted by ZnO-CuO Mesocrystal.NANOSCALE RESEARCH LETTERS,11(10),1-9.
MLA Guo, YN ,et al."Sensitive, Selective, and Fast Detection of ppb-Level H2S Gas Boosted by ZnO-CuO Mesocrystal".NANOSCALE RESEARCH LETTERS 11.10(2016):1-9.
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