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Finely dispersed and highly toluene sensitive NiO/NiGa2O4 heterostructures prepared from layered double hydroxides precursors
Nie, Linfeng1,2; Fan, Guijun1,2; Wang, Anqi1,2; Zhang, Le1,2; Guan, Jian1,2; Han, Ning1,2,3; Chen, Yunfa1,2,3
2021-10-15
Source PublicationSENSORS AND ACTUATORS B-CHEMICAL
Volume345Pages:9
AbstractFabrication of heterojunctioned gas sensing materials is regarded as one of the most efficient ways to improve sensor performance. Herein, finely dispersed NiO/NiGa2O4 heterojunction-based material is synthesized successfully by calcining the atomically mixed Ni-Ga precursors of layered double hydroxides (LDH). The optimized atomic ratio of Ni/Ga is 2.5 and the annealing temperature in H2 is 300 degrees C, and the obtained material shows a high response of 10.54 to 5 ppm toluene working at a low temperature of 200 degrees C. As a comparison, the coprecipitation method prepared analogue shows relatively lower response with the value of 8.5 at a higher working temperature of 250 degrees C, showing the advantage of this LDH prepared material. Moreover, it shows also high selectivity over other interfering gases such as chlorobenzene, acetone, humidity, NH3 and SO2, and long stability over one month measurements. X-ray diffraction, X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy show the efficient NiO/NiGa2O4 heterojunctions fabricated from LDH precursors, which are further enhanced in H2 to induce oxygen vacancy and Schottky barrier of Ni-NiO/NiGa2O4, promising for high performance gas sensors.
KeywordLayered double hydroxides Toluene sensor Heterojunction Schottky barrier
DOI10.1016/j.snb.2021.130412
Language英语
WOS KeywordGAS-SENSING PROPERTIES ; GRAIN-SIZE CONTROL ; ZNO NANORODS ; SENSOR ; PERFORMANCE ; XYLENE ; OXIDE
WOS Research AreaChemistry ; Electrochemistry ; Instruments & Instrumentation
WOS SubjectChemistry, Analytical ; Electrochemistry ; Instruments & Instrumentation
WOS IDWOS:000685512600007
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/49905
Collection中国科学院过程工程研究所
Corresponding AuthorHan, Ning; Chen, Yunfa
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Coll Chem Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Nie, Linfeng,Fan, Guijun,Wang, Anqi,et al. Finely dispersed and highly toluene sensitive NiO/NiGa2O4 heterostructures prepared from layered double hydroxides precursors[J]. SENSORS AND ACTUATORS B-CHEMICAL,2021,345:9.
APA Nie, Linfeng.,Fan, Guijun.,Wang, Anqi.,Zhang, Le.,Guan, Jian.,...&Chen, Yunfa.(2021).Finely dispersed and highly toluene sensitive NiO/NiGa2O4 heterostructures prepared from layered double hydroxides precursors.SENSORS AND ACTUATORS B-CHEMICAL,345,9.
MLA Nie, Linfeng,et al."Finely dispersed and highly toluene sensitive NiO/NiGa2O4 heterostructures prepared from layered double hydroxides precursors".SENSORS AND ACTUATORS B-CHEMICAL 345(2021):9.
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