Sensors and Actuators, B: Chemical
Sensors and Actuators, B: Chemical
5 years ago

Reversible and fast responding ppb level Cl2 sensor based on noncovalent modified carbon nanotubes with Hexadecafluorinated copper phthalocyanine

Reversible and fast responding ppb level Cl2 sensor based on noncovalent modified carbon nanotubes with Hexadecafluorinated copper phthalocyanine
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. Cl2 selective chemiresistive gas sensors have been fabricated using these hybrids with detection limit up to 0.27ppb. The main characteristics of these sensors are their excellent baseline recovery and reversibility upon repeated exposure to Cl2. F16CuPc/SWCNTs-COOH based sensors showed a gas response as large as 35.82% with a fast response time of 9s towards 2ppm of Cl2. A plausible gas sensing mechanism for charge transfer in hybrids on interacting with Cl2 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.

Publisher URL: www.sciencedirect.com/science

DOI: S0925400517314351

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