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李学,张俊,梁士明,储向峰,白林山,董永平.水热法制备石墨烯-镓酸锌复合物及其气敏性能的研究[J].稀有金属材料与工程(英文),2019,48(9):2815~2820.[Li Xue,Zhang Jun,Shiming Liang,Xiangfeng Chu,Linshan Bai and Yongping Dong.Gas sensing properties of graphene-ZnGa2O4composites prepared by hydrothermal method[J].Rare Metal Materials and Engineering,2019,48(9):2815~2820.]
Gas sensing properties of graphene-ZnGa2O4composites prepared by hydrothermal method
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Received:April 09, 2018  Revised:July 15, 2018
DOI:
Key words: Graphene  ZnGa2O4  Formaldehyde  Gas sensor
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Li Xue,Zhang Jun,Shiming Liang,Xiangfeng Chu,Linshan Bai and Yongping Dong  
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Abstract:
      A series of Graphene-ZnGa2O4composites (G-ZnGa2O4) were synthesized by hydrothermal method. The prepared materials were characterized by means of XRD, SEM, TEM, Raman and XPS, respectively. The gas sensing properties of G-ZnGa2O4 composites were investigated. The results indicated that the graphene content has a great influence on the response and the gas sensing selectivity, the optimal composition of G-ZnGa2O4 gas sensing material was 0.1%G- ZnGa2O4. The sensor based on 0.1% G-ZnGa2O4 exhibited high response to 1000 ppm formaldehyde when operated at 203oC and the response reached 32.2; the detection limit for formaldehyde was as low as 1ppm; the gas sensing selectivity to formaldehyde was also good, the ratio of S1000 ppm formaldehyde and S1000 ppm acetone reached 26.8. The response time and recovery time for 1000 ppm formaldehyde were 11 s and 5 s, the response time and recovery time for 1 ppm formaldehyde were 6 s and 5 s, respectively.