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

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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
Additional Information: Copyright for this article belongs to M/s Royal Society of Chemistry.
Subjects: Chemistry
Depositing User: Users 27 not found.
Date Deposited: 24 Aug 2018 08:19
Last Modified: 24 Aug 2018 08:19

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