Sharma, Anshul Kumar and Mahajan, Aman and Bedi, R. K. and Kumar, Subodh and Debnath, A. K. and Aswal, D. K.
(2017)
CNTs based improved chlorine sensor from non-covalently anchored multi-walled carbon nanotubes with hexa-decafluorinated cobalt phthalocyanines.
RSC Advances , 7 (78).
pp. 49675-49683.
ISSN 2046-2069
Abstract
To study the effect of synergetic interactions between metal-phthalocyanine and carbon nanotubes for gas sensing characteristics of carbon nanotubes, we synthesized a hybrid of cobalt(II)-1,2,3,4,8,9,10,11,15,16,17,18,22,23,24,25-hexa-decafluoro-29H,31H-phthalocyanine/multi-walled carbon nanotubes (F16CoPc/MWCNTsCOOH). The as-prepared hybrid was characterized through spectroscopic (FT-IR, UV-vis and Raman), electron microscopic (TEM and FE-SEM) and TGA investigations that confirmed the successful non-covalent anchoring of F16CoPc onto MWCNTsCOOH through pi-pi stacking interactions. Further, a highly reversible, reproducible, sensitive and Cl-2 selective chemiresistive sensor was fabricated using F16CoPc/MWCNTsCOOH hybrid, which exhibited a sensitivity of similar to 63% for 2 ppm of Cl-2 and a limit of detection as low as 0.05 ppb. A plausible gas sensing mechanism for improved gas sensing characteristics of F16CoPc/MWCNTsCOOH sensor towards Cl-2 was explained using Raman, X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) studies. Herein, cobalt metal ion is found to play an important role in enhancing gas sensing characteristics of the fabricated sensor.
| Item Type: |
Article
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| Additional Information: |
Copyright for this article belongs to M/s Royal Society of Chemistry.
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| Subjects: |
Chemistry |
| Divisions: |
UNSPECIFIED |
| Depositing User: |
Users 27 not found. |
| Date Deposited: |
24 Aug 2018 08:19 |
| Last Modified: |
24 Aug 2018 08:19 |
| URI: |
http://npl.csircentral.net/id/eprint/2637 |
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