Sharma, Anshul Kumar and Mahajan, Aman and Saini, Rajan and Bedi, R. K. and Kumar, Subodh and Debnath, A. K. and Aswal, D. K. (2018) Reversible and fast responding ppb level Cl-2 sensor based on noncovalent modified carbon nanotubes with Hexadecafluorinated copper phthalocyanine. Sensors and Actuators B: Chemical , 255 (1). pp. 87-99. ISSN 0925-4005

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Hybrids of hexadecafluorinated copper phthalocyanine (F16CuPc) with carboxylic functionalized single walled carbon nanotubes (SWCNTs-COOH) and multi-walled carbon nanotubes (MWCNTs-COOH) have been synthesized using a solution assembly method. The resulting hybrid materials have been characterized by Transmission electron microscopy, Raman, UV-vis, X-Ray photoelectron, Fourier-transform infrared spectroscopic techniques and finally studied for gas sensing application. Cl-2 selective chemiresistive gas sensors have been fabricated using these hybrids with detection limit up to 0.27 ppb. The main characteristics of these sensors are their excellent baseline recovery and reversibility upon repeated exposure to Cl-2. F16CuPc/SWCNTs-COOH based sensors showed a gas response as large as 35.82% with a fast response time of 9 s towards 2 ppm of Cl-2. A plausible gas sensing mechanism for charge transfer in hybrids on interacting with Cl-2 has been proposed on basis of X-ray photoelectron and impedance spectroscopic studies. These outcomes clearly indicate the great potential of the low cost solution assembly approach for sensor device.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Elsevier.
Subjects: Chemistry > Analytical Chemistry
Information Science and Library Science
Depositing User: Mr. Yogesh Joshi
Date Deposited: 27 Sep 2019 08:23
Last Modified: 27 Sep 2019 08:23

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