Sharma, Anshul Kumar and Mahajan, Aman and Bedi, R. K. and Kumar, Subodh and Debnath, A. K. and Aswal, D. K. (2018) Non-covalently anchored multi-walled carbon nanotubes with hexa-decafluorinated zinc phthalocyanine as ppb level chemiresistive chlorine sensor. Applied Surface Science, 427 (A). 202-209 . ISSN 0169-4332

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Abstract

A cost effective solution assembly method has been explored for preparing zinc(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 (F16ZnPc/MWCNTs-COOH) hybrid. Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, transmission electron microscopy (TEM) and field emission scanning electron microscopy (FE-SEM) investigations confirm the non-covalent anchoring of F16ZnPc onto MWCNTs-COOH through Pi-Pi stacking interactions. Further, a highly sensitive and selective chemiresistive Cl-2 sensor has been fabricated using F16ZnPc/MWCNTs-COOH hybrid. The response of sensor is found to be 21.28% for 2 ppm of Cl-2 with a response time of 14 s and theoretical detection limit of the sensor is found down to 0.06 ppb. The improved Cl-2 sensing characteristics of hybrid are found to be originated from the synergetic interaction between F16ZnPc and MWCNTs-COOH. The underlying mechanism for improved gas sensing performance of F16ZnPc/MWCNTs-COOH sensor towards Cl-2 has been explained using Raman, X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) studies.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Chemistry > Physical Chemistry Materials Science Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	17 Oct 2019 07:43
Last Modified:	17 Oct 2019 07:43
URI:	http://npl.csircentral.net/id/eprint/3931

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