基于钯—纳米二氧化锡膜状电极的室温氢气传感器
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摘要
氢气作为一种清洁能源具有极好的应用前景,但氢气的易爆性对其应用推广造成很大的障碍,需要不断研制开发灵敏高效、易于使用的氢气传感器监控氢气的存储运输以及使用。二氧化锡-钯材料常见于氢气传感器。近来,使用一锅水热法合成的新型二氧化锡纳米层片具有非常薄的尺度以及极高的表面积。本工作主要探索了该二氧化锡纳米层片的气体传感性能。通过湿化学沉积方法,二氧化锡纳米层片以及钯被沉积到氧化铝陶瓷基底表面形成一层钯-纳米二氧化锡薄膜,整个制备过程在室温下进行且不需要加热处理。钯-纳米二氧化锡膜状传感器可以在室温下对100--1500 ppm氢气快速响应,重复性良好。此外还考察了薄膜构成(钯锡比率)、退火温度、湿度等因素对钯-纳米二氧化锡膜状传感器氢气检测的影响。
Hydrogen has excellent prospects as a clean energy, but the explosive nature of hydrogen causes a great obstacle to its application. Sensitive, effective and easy-to-use hydrogen sensors are needed to prevent hydrogen leak during the storage, transportation and use of hydrogen. SnO2 and Pd materials are commonly used in hydrogen sensors. Recently, extremely thin SnO2 nanosheets with high surface area was fabricated through a one-pot hydrothermal method. In this work, the gas sensing property of the SnO2 nanosheets was further explored. SnO2-Pd mixed thin films were prepared by electroless deposition of nanostructured SnO2 and Pd onto the surface of a high resistance alumina substrate. The whole fabrication process was carried out at room temperature without any further treatment required. It has been found that the SnO2-Pd sensor has a high response in the range of 100-1500 ppm toward hydrogen gas at room temperature with a short response time. The sensor also shows good repeatability. Effects of the composition (Pd/Sn ratio) of the sensing film, annealing condition and influence of humidity on the H2 gas sensitivity were investigated as well.
Hydrogen has excellent prospects as a clean energy, but the explosive nature of hydrogen causes a great obstacle to its application. Sensitive, effective and easy-to-use hydrogen sensors are needed to prevent hydrogen leak during the storage, transportation and use of hydrogen. SnO2 and Pd materials are commonly used in hydrogen sensors. Recently, extremely thin SnO2 nanosheets with high surface area was fabricated through a one-pot hydrothermal method. In this work, the gas sensing property of the SnO2 nanosheets was further explored. SnO2-Pd mixed thin films were prepared by electroless deposition of nanostructured SnO2 and Pd onto the surface of a high resistance alumina substrate. The whole fabrication process was carried out at room temperature without any further treatment required. It has been found that the SnO2-Pd sensor has a high response in the range of 100-1500 ppm toward hydrogen gas at room temperature with a short response time. The sensor also shows good repeatability. Effects of the composition (Pd/Sn ratio) of the sensing film, annealing condition and influence of humidity on the H2 gas sensitivity were investigated as well.
引文
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[2]侯长军范小花唐一科范瑛氢敏材料与器件的研究进展材料科学与工程学报2007 25(3)471-475
[3]Jiawei Xu, Peter Offermans, Guy Meynants, Hien Duy Tong, Cees J.M. van Rijn and Patrick Merken, A low-power readout circuit for nanowire based hydrogen sensor, Microelectronics Journal,2010,41(11),733-739
[4]Serhiy Cherevko, Nadiia Kulyk, Jie Fuand and Chan-Hwa Chung, Hydrogen sensing performance of electrodeposited conoidal palladium nanowire and nanotube arrays, Sensors and Actuators B:Chemical,2009,136(2),388-391
[5]Jianli Zou, Lee J. Hubble, K. Swaminathan Iyer and Colin L. Raston, Bare palladium nano-rosettes for real-time high-performance and facile hydrogen sensing, Sensors and Actuators B:Chemical,2010,150(1),291-295
[6]Xiaotong Wei, Tao Wei, Hai Xiao and Y.S. Lin, Nano-structured Pd-long period fiber gratings integrated optical sensor for hydrogen detection, Sensors and Actuators B:Chemical, 2008,134(2),687-693
[7]Yang-Tse Cheng, Yang Li, Dan Lisi and W. M. Wang, Preparation and characterization of Pd/Ni thin films for hydrogen sensing, Sensors and Actuators B:Chemical,1996,30(1),11-16
[8]Min Wang and Ying Feng, Palladium-silver thin film for hydrogen sensing, Sensors and Actuators B:Chemical,2007,123(1),101-106
[9]Donato Luna-Moreno, David Monzon-Hernandez, Joel Villatoro and Goncal Badenes, Optical fiber hydrogen sensor based on core diameter mismatch and annealed Pd-Au thin films, Sensors and Actuators B:Chemical,2007,125(1),66-71
[10]Dongyan Ding, Zhi Chen and Chi Lu, Hydrogen sensing of nanoporous palladium films supported by anodic aluminum oxides, Sensors and Actuators B:Chemical,2006,120(1), 182-186
[11]F. Rumiche, H.H. Wang, W.S. Hu, J.E. Indacochea and M.L. Wang, Anodized aluminum oxide (AAO) nanowell sensors for hydrogen detection, Sensors and Actuators B:Chemical, .2008,134(2),869-877
[12]Sunil K. Arya, S. Krishnan, K. McGrath, F. Rinaldi and S. Bhansali, Concentration specific detection of hydrogen at room temperature using palladium nanoparticles-nafion film, Procedia Engineering,2010,5,168-171
[13]Salim F. Bamsaoud, S.B. Rane, R.N. Karekar and R.C. Aiyer, Nano particulate SnO2 based resistive films as a hydrogen and acetone vapour sensor, Sensors and Actuators B:Chemical, Article in Press
[14]Yanbai Shen, Toshinari Yamazaki, Zhifu Liu, Dan Meng and Toshio Kikuta, Hydrogen sensors made of undoped and Pt-doped SnO2 nanowires, Journal of Alloys and Compounds, 2009,488(1), L21-L25
[15]Andrey S. Ryzhikov, Anatoly N. Shatokhin, Felix N. Putilin, Marina N. Rumyantseva, Alexandre M. Gaskov and Michel Labeau, Hydrogen sensitivity of SnO2 thin films doped with Pt by laser ablation, Sensors and Actuators B:Chemical,2005,107(1),387-391
[16]Il Jin Kim, Sang Do Han, Chi Hwan Han, Jihye Gwak, Dae Ung Hong, Devender Jakhar, K.C. Singh and Jin Suk Wang, Development of micro hydrogen gas sensor with SnO2-Ag2O-PtOx composite using MEMS process, Sensors and Actuators B:Chemical,2007, 127(2),441-446
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