Low concentration CO gas sensor constructed from MoS2 nanosheets dispersed SnO2 nanoparticles at room temperature under UV light |
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| Affiliation: | 1. Engineering Research Center of Smart Microsensors and Microsystems, Ministry of Education, College of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China;2. Institute of Advanced Technology, Hangzhou Dianzi University, Hangzhou, 310018, China;3. State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027, China;4. Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, 6997801, Israel |
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| Abstract: | In consideration of the different electron structure-associated physical properties and internal sensing merits of MoS2 and SnO2, this work reports a nanocomposite with unique structure of MoS2 nanosheets dispersed SnO2 nanoparticles. The sensing performance of MoS2/SnO2 sensor toward low concentration CO was investigated at room temperature under the UV light illumination. It was found that MoS2/SnO2 sensor shows improved CO gas response (R ~ 4.97 at 40 ppm CO) compared with pure SnO2 (R ~ 3.27 at 40 ppm CO), which is due to the unique structure and the formation of heterostructure between MoS2 and SnO2. Moreover, the fabricated sensor also exhibits fast response and recovery time (43 s/36 s). The sensor provides a potential platform for monitoring CO gas at room temperature. |
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| Keywords: | CO sensor Heterostructure Room temperature Low concentration |
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