Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films
In this work, the P3HT:rGO:MWCNTs (PGC) nanocomposite film applied to the ammonia gas sensor was successfully fabricated by a drop-casting technique. The results demonstrated that the optimum weight ratio of the PGC nanocomposite gas sensor is 20%:60%:20% as the weight ratio of P3HT:rGO:MWCNTs (call...
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doaj-1b3ba4114b0c4191935ddbd80cf5b0b42021-08-06T15:18:19ZengMDPI AGApplied Sciences2076-34172021-07-01116675667510.3390/app11156675Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite FilmsTran Si Trong Khanh0Tran Quang Trung1Le Thuy Thanh Giang2Tran Quang Nguyen3Nguyen Dinh Lam4Nguyen Nang Dinh5Faculty of Engineering Physics and Nanotechnology, University of Engineering and Technology, VNU in Hanoi, No. 144 Xuan Thuy Road, Cau Giay District, Hanoi 10000, VietnamSolid-State Physics Department, Faculty of Physics and Engineering Physics, University of Natural Science, VNU in Ho Chi Minh City, 227 Nguyen Van Cu Road, District 5, Ho Chi Minh City 70000, VietnamSolid-State Physics Department, Faculty of Physics and Engineering Physics, University of Natural Science, VNU in Ho Chi Minh City, 227 Nguyen Van Cu Road, District 5, Ho Chi Minh City 70000, VietnamSolid-State Physics Department, Faculty of Physics and Engineering Physics, University of Natural Science, VNU in Ho Chi Minh City, 227 Nguyen Van Cu Road, District 5, Ho Chi Minh City 70000, VietnamFaculty of Engineering Physics and Nanotechnology, University of Engineering and Technology, VNU in Hanoi, No. 144 Xuan Thuy Road, Cau Giay District, Hanoi 10000, VietnamFaculty of Engineering Physics and Nanotechnology, University of Engineering and Technology, VNU in Hanoi, No. 144 Xuan Thuy Road, Cau Giay District, Hanoi 10000, VietnamIn this work, the P3HT:rGO:MWCNTs (PGC) nanocomposite film applied to the ammonia gas sensor was successfully fabricated by a drop-casting technique. The results demonstrated that the optimum weight ratio of the PGC nanocomposite gas sensor is 20%:60%:20% as the weight ratio of P3HT:rGO:MWCNTs (called PGC-60). This weight ratio leads to the formation of nanostructured composites, causing the efficient adsorption/desorption of ammonia gas in/out of the film surface. The sensor based on PGC-60 possessed a response time of 30 s, sensitivity up to 3.6% at ammonia gas concentration of 10 ppm, and relative sensitivity of 0.031%/ppm. These results could be attributed to excellent electron transportation of rGO, the main adsorption activator to NH<sub>3</sub> gas of P3HT, and holes move from P3HT to the cathodes, which works as charge “nano-bridges” carriers of Multi-Walled Carbon Nanotubes (MWCNTs). In general, these three components of PGC sensors have significantly contributed to the improvement of both the sensitivity and response time in the NH<sub>3</sub> gas sensor.https://www.mdpi.com/2076-3417/11/15/6675P3HT-rGO-MWCNT nanocompositedrop-castingheterojunctionNH<sub>3</sub> gas sensorsresponse timesensitivity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tran Si Trong Khanh Tran Quang Trung Le Thuy Thanh Giang Tran Quang Nguyen Nguyen Dinh Lam Nguyen Nang Dinh |
spellingShingle |
Tran Si Trong Khanh Tran Quang Trung Le Thuy Thanh Giang Tran Quang Nguyen Nguyen Dinh Lam Nguyen Nang Dinh Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films Applied Sciences P3HT-rGO-MWCNT nanocomposite drop-casting heterojunction NH<sub>3</sub> gas sensors response time sensitivity |
author_facet |
Tran Si Trong Khanh Tran Quang Trung Le Thuy Thanh Giang Tran Quang Nguyen Nguyen Dinh Lam Nguyen Nang Dinh |
author_sort |
Tran Si Trong Khanh |
title |
Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films |
title_short |
Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films |
title_full |
Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films |
title_fullStr |
Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films |
title_full_unstemmed |
Ammonia Gas Sensing Characteristic of P3HT-rGO-MWCNT Composite Films |
title_sort |
ammonia gas sensing characteristic of p3ht-rgo-mwcnt composite films |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2021-07-01 |
description |
In this work, the P3HT:rGO:MWCNTs (PGC) nanocomposite film applied to the ammonia gas sensor was successfully fabricated by a drop-casting technique. The results demonstrated that the optimum weight ratio of the PGC nanocomposite gas sensor is 20%:60%:20% as the weight ratio of P3HT:rGO:MWCNTs (called PGC-60). This weight ratio leads to the formation of nanostructured composites, causing the efficient adsorption/desorption of ammonia gas in/out of the film surface. The sensor based on PGC-60 possessed a response time of 30 s, sensitivity up to 3.6% at ammonia gas concentration of 10 ppm, and relative sensitivity of 0.031%/ppm. These results could be attributed to excellent electron transportation of rGO, the main adsorption activator to NH<sub>3</sub> gas of P3HT, and holes move from P3HT to the cathodes, which works as charge “nano-bridges” carriers of Multi-Walled Carbon Nanotubes (MWCNTs). In general, these three components of PGC sensors have significantly contributed to the improvement of both the sensitivity and response time in the NH<sub>3</sub> gas sensor. |
topic |
P3HT-rGO-MWCNT nanocomposite drop-casting heterojunction NH<sub>3</sub> gas sensors response time sensitivity |
url |
https://www.mdpi.com/2076-3417/11/15/6675 |
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