Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Fabrication of C2H2 Gas Sensors Based on Ag/ZnO-rGO Hybrid Nanostructures and Their Characteristics

Ag/ZnO-rGO 하이브리드 나노구조 기반 C2H2 가스센서의 제작과 그 특성

  • Received : 2014.11.17
  • Accepted : 2015.01.14
  • Published : 2015.01.31
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Abstract

In this work, pure hierarchical ZnO structure was prepared using a simple hydrothermal method, and Ag nanoparticles doped hierarchical ZnO structure was synthesized uniformly through photochemical route. The reduced graphene oxide (rGO) has been synthesized by typical Hummer's method and reduced by hydrazine. Prepared Ag/ZnO nanostructures are uniformly dispersed on the surface of rGO sheets using ultrasonication process. The synthesized samples were characterized by SEM, TEM, EDS, XRD and PL spectra. The average size of prepared ZnO microspheres was around $2{\sim}3{\mu}m$ and showed highly uniform. The average size of doped-Ag nanoparticles was 50 nm and decorated into ZnO/rGO network. The $C_2H_2$ gas sensing properties of as-prepared products were investigated using resistivity-type gas sensor. Ag/ZnO-rGO based sensors exhibited good performances for $C_2H_2$ gas in comparison with the Ag/ZnO. The $C_2H_2$ sensor based on Ag/ZnO-rGO had linear response property from 3~1000 ppm of $C_2H_2$ concentration at working temperature of $200^{\circ}C$. The response values with 100 ppm $C_2H_2$ at $200^{\circ}C$ were 22% and 78% for Ag/ZnO and Ag/ZnO-rGO, respectively. In additions, the sensor still shows high sensitivity and quick response/recovery to $C_2H_2$ under high relative humidity conditions. Moreover, the device shows excellent selectivity towards to $C_2H_2$ gas at optimal working temperature of $200^{\circ}C$.

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References

  1. N. Tamaekong, C. Liewhiran, A. Wisitsoraat, and S. Phanichphant, "Acetylene sensor based on Pt/ZnO thick films as prepared by flame spray pyrolysis", Sens. Actuator BChem., Vol. 152, pp. 155-161, 2011. https://doi.org/10.1016/j.snb.2010.11.058
  2. G. Lu, L. E. Ocola, and J. Chen, "Reduced graphene oxide for room-temperature gas sensors", N. Tech., Vol. 20, pp. 1-9, 2009.
  3. G. Eda, G. Fanchini, and M. Chhowalla, "Large-area ultrathin films of reduced graphene oxide as a transparent and flexible electronic material", Nature Nanotech., Vol. 3, pp. 270-274, 2008. https://doi.org/10.1038/nnano.2008.83
  4. S. Basu and P. Bhattacharyya, "Recent developments on graphene and graphene oxide based solid", Sens. Actuator B-Chem., Vol. 173, pp. 1-21, 2013.
  5. C. Xu, X. Wang, and J. Zhu, "Graphene-metal particle nanocomposites", J. Phys. Chem. C, Vol. 112, pp. 19841-19845, 2008. https://doi.org/10.1021/jp807989b
  6. A. S. M. Iftekhar Uddin and G. S. Chung, "Synthesis of highly dispersed ZnO nanoparticles on graphene surfaceand their acetylene sensing properties", Sens. Actuator B-Chem., Vol. 205, pp. 338-344, 2014. https://doi.org/10.1016/j.snb.2014.09.005
  7. A. S. M. Iftekhar Uddin and G. S. Chung, "Low temperature acetylene gas sensor based on Agnanoparticlesloaded ZnO-reduced graphene oxide hybrid", Sens. Actuator B-Chem., Vol. 207, pp. 362-369, 2015. https://doi.org/10.1016/j.snb.2014.10.091
  8. K. Anand, O. Singh, M. P. Singh, J. Kaur, R., and R. C. Singh, "Hydrogen sensor based on graphene/ZnO nanocomposite", Sens. Actuator B-Chem., Vol. 195, pp. 409-415, 2014. https://doi.org/10.1016/j.snb.2014.01.029
  9. A. Kaniyoor, R. I. Jafri, T. Arockiadoss, and S. Ramaprabhu, "Nanostructured Pt decorated graphene and multi walled carbon nanotube based room temperature hydrogen gas sensor", R. S. Chemi., Vol. 1, pp. 382-386, 2009.
  10. G. Singh, A. Choudhary, D. Haranath, A. G. Joshi, N. Singh, S. Singh, and R. Pasricha, "ZnO decorated luminescent graphene as a potential gas sensor at room temperature", Carbon, Vol. 50, pp. 385-394, 2012. https://doi.org/10.1016/j.carbon.2011.08.050
  11. R. Zou, G. He, K. Xu, Q. Liu, Z. Zhang, and J. Hu, "ZnO nanorods on reduced graphene sheets with excellent field emission, gas sensor and photocatalytic properties", J. Mater. Chem. A, Vol. 1, pp. 8445-8452, 2013. https://doi.org/10.1039/c3ta11490b
  12. Y. Zhu, S. Murali, W. Cai, X. Li, J. W. Suk, J. R. Potts, and R. S. Ruoff, "Graphene and graphene oxide: Synthesis, properties, and applications", Adv. Mater., Vol. 22, pp. 3906-3924, 2010. https://doi.org/10.1002/adma.201001068
  13. S. J. Park, J. An, J. R. Potts, A. Velamakanni, S. Murali, and R. S. Ruoff, "Hydrazine-reduction of graphite and graphene oxide", Carbon, Vol. 49, pp. 3019-3023, 2011. https://doi.org/10.1016/j.carbon.2011.02.071
  14. Z. S. Wu, G. Zhou, L. C. Yin, W. Ren, F. Li, H. and M. Cheng, "Graphene/metal oxide composite electrode materials for energy storage", N. Energy, Vol. 1, pp. 107-131, 2012. https://doi.org/10.1016/j.nanoen.2011.11.001
  15. J. H. Lee, "Gas sensors using hierarchical and hollow oxide nanostructures: Overview", Sens. Actuator B-Chem., Vol. 140, pp. 319-336, 2009. https://doi.org/10.1016/j.snb.2009.04.026
  16. L. Zhang, G. Du, B. Zhou, and L. Wang, "Green synthesis of flower-like ZnO decorated reduced graphene oxide composites", C. Inter., Vol. 40, pp. 1241-1244, 2014. https://doi.org/10.1016/j.ceramint.2013.06.023
  17. N. D. Khoang, D. D. Trung, N. V. Duy, N. D. Ho, and N. V. Hieu, "Design of $SnO_2$/ZnO hierarchical nanostructures for enhanced ethanol gas-sensing performance", Sens. Actuator B-Chem., Vol. 174, pp. 594-601, 2012. https://doi.org/10.1016/j.snb.2012.07.118
  18. Q. Qi, T. Zhang, X. Zheng, H. Fan, L. Liu, R. Wang, and Y. Zeng, "Electrical response of $Sm_2O_3$-doped $SnO_2$ to $C_2H_2$ and effect of humidity interference", Sens. Actuator BChem., Vol. 134, pp. 36-42, 2008. https://doi.org/10.1016/j.snb.2008.04.011