Email this article MODIFICATION OF SnO2 NANOWIRES BY Cu(NO3)2 SOLUTION DROPPING FOR ENHANCING H2S SENSING CHARACTERISTICS
About this article
Received: 20/10/20 Revised: 14/11/20 Published: 27/11/20Authors
1. Phung Thi Hong Van
, Trường Đại học Tài nguyên và Môi Trường Hà Nội2. Nguyen Van Toan, Trường Đại học Bách khoa Hà Nội
3. Vu Ngoc Phan, Trường Đại học Phenikaa
Abstract
CuO nanoparticles modified SnO2 nanowires were fabricated by dropping copper nitrate aqueous solution onto SnO2 nanowires as-prepared on Si/SiO2 electrodes. The CuO-modified SnO2 nanowires had a superior H2S response in comparison with raw SnO2 nanowire sensors. At 250°C, the Ra/Rg values of the raw SnO2 nanowires to from 0.25 to 2.5 ppm H2S were from 1.6 to 2.36 respectively, while CuO-modified SnO2 nanowires responses to the same concentrations of H2S were from 1.7 to 531.
In addition, at the working temperature of 150°C, the CuO-modified SnO2 nanowires H2S responses increases sharply from 66 to 2023 depending on the gas concentrations (0.25-2.5 ppm). The results shown that, the modification of SnO2 nanowires with CuO not only increases the response to H2S gas but also reduces the working temperature of the SnO2 nanowire sensor.
Keywords
Full Text:
PDF (Tiếng Việt)References
[1]. S. K. Pandey, K. -H. Kim, and K .-T. Tang, "A review of sensor-based methods for monitoring hydrogen sulfide," TrAC Trends in Analytical Chemistry, vol. 32, pp. 87-99, 2012, doi:10.1016/j.trac.2011.08.008.
[2]. Y. Guan, C. Yin, X. Cheng, X. Liang, Q. Diao, and H. Zhang, “Sub-ppm H2S sensor based on YSZ and hollow balls NiMn2O4 sensing electrode,” Sensors and Actuators B: Chemical, vol. 193, pp. 501-508, 2014, doi:10.1016/j.snb.2013.11.072.
[3]. N. V. Hieu, H. -R. Kim, B. -K. Ju, and J.-H. Lee, “Enhanced performance of SnO2 nanowires ethanol sensor by functionalizing with La2O3,” Sensors and Actuators B: Chemical, vol. 133, no. 1, pp. 228-234, 2008.
[4]. I. -S. Hwang, J.-K. Choi, H.-S. Woo, S.-J. Kim, S.-Y. Jung, T.-Y. Seong, I.-D. Kim, and J.-H. Lee, “Facile control of C2H5OH sensing characteristics by decorating discrete Ag nanoclusters on SnO2 nanowire networks,” ACS Applied Materials & Interfaces, vol. 3, no. 8, pp. 3140-3145, 2011.
[5]. D. D. Trung, L. D. Toan, H. S. Hong, T. D. Lam, T. Trung, and N. V. Hieu, “Selective detection of carbon dioxyde using LaOCl-functionalized SnO2 nanowires for air-quality monitoring,” Talanta, vol. 88, pp. 152-159, 2012.
[6]. I.-S. Hwang, J.-K. Choi, S.-J. Kim, K.-Y. Dong, J.-H. Kwon, B.-K. Ju, and J.-H. Lee "Enhanced H2S sensing characteristics of SnO2 nanowires functionalized with CuO,” Sensors and Actuators B: Chemical, vol. 142, pp. 105-110, 2009.
[7]. J. M. Lee, J.-E. Park, S. Kim, S. Kim, E. Lee, S.-J. Kim, and W. Lee, “Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxyde nanostructures: room temperature operating sensors,” International Journal of Hydrogen Energy, vol. 35, no. 22, pp. 12568-12573, 2010.
[8]. Y. Shen, T. Yamazaki, Z. Liu, D. Meng, T. Kikuta, N. Nakatani, M. Saito, and M. Mori “Microstructure and H2 gas sensing properties of undoped and Pd-doped SnO2 nanowires,” Sensors and Actuators B: Chemical, vol. 135 no. 2, pp. 524-529, 2009.
[9]. N. M. Shaalan, T. Yamazaki, and T. Kikuta “NO2 response enhancement and anomalous behavior of n-type SnO2 nanowires functionalized by Pd nanodots,” Sensors and Actuators B: Chemical, vol. 166-167, pp. 671-677, 2002.
[10]. H. Li, J. Xu, Y. Zhu, X. Chen, and Q. Xiang “Enhanced gas sensing by assembling Pd nanoparticles onto the surface of SnO2 nanowires,” Talanta, vol. 82, no. 2, pp. 458-463, 2010.
[11]. S.-W. Choi, S.-H. Jung, and S.S. Kim, “Significant enhancement of the NO2 sensing capability in networked SnO2 nanowires by Au nanoparticles synthesized via γ-ray radiolysis,” Journal of Hazardous Materials, vol. 193, pp. 243-248, 2011.Refbacks
- There are currently no refbacks.