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Finely dispersed and highly toluene sensitive NiO/NiGa2O4 heterostructures prepared from layered double hydroxides precursors

文献类型：期刊论文

作者Nie, Linfeng2,3; Fan, Guijun2,3; Wang, Anqi2,3; Zhang, Le2,3; Guan, Jian2,3; Han, Ning1,2,3; Chen, Yunfa1,2,3
刊名SENSORS AND ACTUATORS B-CHEMICAL
出版日期2021-10-15
卷号345页码:9
关键词Layered double hydroxides Toluene sensor Heterojunction Schottky barrier
DOI10.1016/j.snb.2021.130412
英文摘要Fabrication 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.
WOS关键词GAS-SENSING PROPERTIES ; GRAIN-SIZE CONTROL ; ZNO NANORODS ; SENSOR ; PERFORMANCE ; XYLENE ; OXIDE
WOS研究方向Chemistry ; Electrochemistry ; Instruments & Instrumentation
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000685512600007
源URL[http://ir.ipe.ac.cn/handle/122111/49904]  
专题中国科学院过程工程研究所
通讯作者Han, Ning; Chen, Yunfa
作者单位1.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
2.Univ Chinese Acad Sci, Coll Chem Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式
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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来源：过程工程研究所

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