Adsorption and supercapacitor applications of CoO-zeolite decorated conducting polymer nanocomposite

ABSTRACT

Cobalt Oxide−Zeolite reinforced conducting polymer matrices (PAni@CoO−ZT) were prepared by in-situ oxidative polymerisation, and the samples were characterised by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), UV-visible, scanning electron microscopy (SEM) and Brunauer – Emmett – Teller (BET) techniques, the optical band gap was also evaluated. Moreover, the synthesis and exploration of electrodes are increasingly being considered for the development of conducting polymer-based supercapacitors, which has attracted significant interest in energy conversion and storage technology. Here, hybrid materials applied in the elaboration of the electrodes on the capacitive properties were studied. Therewith, electrochemical measurements revealed that the PAni@CoO−ZT (1:1) and PAni@CoO−ZT (2:1) electrodes had high capacitance of 1069 F·g⁻¹ and 1282 F·g⁻¹ at a current density of 1.0 A·g⁻¹ and outstanding capacitance retention (81.7% and 89.1%) over 1500 cycles, respectively. Generally, producing a PAni matrix on CoO−ZT presented a simple and viable way to ameliorate the capacitive performances of supercapacitor. Furthermore, adsorptive removal of methyl violet (MV) dye by PAni@CoO−ZT adsorbents could be described by the pseudo-first-order and Temkin models. The maximum adsorptive capacity of MV dye by PAni@CoO−ZT (1:1) and PAni@CoO−ZT (2:1) was 74.6 mg·g⁻¹ and 109.8 mg·g⁻¹, respectively.

KEYWORDS:

• Zeolite
• cobalt oxide
• polyaniline
• supercapacitors
• adsorption

Acknowledgments

The authors wish to thank their parental universities for providing the necessary facilities to accomplish the present work. We also would thank Prof. Emilia Morallón of IUMA at Alicante University, Spain for her co-operation.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/03067319.2024.2304069.