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A selective room temperature formaldehyde gas sensor using TiO2 nanotube arrays |
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| Authors: | Shiwei LinAuthor VitaeDongrong LiAuthor Vitae |
| Affiliation: | Key Laboratory of Ministry of Education for Application Technology of Chemical Materials in Hainan Superior Resources, Hainan University, Haikou 570228, PR China; Institute of Sensor Technologies, School of Electronic Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024, PR China; Center for Industrial Sensors and Measurements, Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA |
| Abstract: | A new gas sensor using TiO2 nanotube arrays was fabricated and explored for formaldehyde detection at room temperature. Highly ordered vertically grown TiO2 nanotube arrays were synthesized by using the conventional electrochemical anodization process. The sensor using the fabricated nanotube arrays as the sensing elements demonstrated a good response to different concentrations of formaldehyde from 10 to 50 ppm and a very good selectivity over other reducing gas species such as ethanol and ammonia at room temperature. While the exact sensing mechanism is unclear, some possibilities are briefly discussed. |
| Keywords: | TiO2 Room temperature gas sensor Formaldehyde |
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