Turkish Journal of Chemistry
Abstract
This study investigates the preparation and properties of aniline polymerized in situ onto a nanosized TiO2 surface to form core-shell nanoparticles at ambient temperatures. The in situ polymerization of aniline to polyaniline (PANI), in conjunction with the utilization of an anionic surfactant, was employed in this investigation. The prepared PANI-TiO2 core-shell nanoparticles were integrated with chitosan at a gravimetric ratio and cast as core-shell nanocomposite membranes. The nanocomposites were subjected to structural analysis using Fourier transform infrared spectroscopy and X-ray diffraction patterns. The surface morphologies of the PANI and its nanocomposites were analyzed using scanning electron microscopy. Direct current conductivity studies revealed three discrete tiers of conductivity intrinsic to a semiconductor material. The nanocomposite, comprising a chitosan membrane embedded with 4 wt.% PANI-TiO2, demonstrated peak direct current conductivity of 5.7 S/cm. The properties of the core-shell nanocomposite membranes could be elucidated using cyclic voltammetry, a technique that allowed for the observation of redox peaks occurring at 0.94 V and 0.25 V. The presence of both peaks was due to the redox transition of the prepared nanocomposite membranes from a semiconducting to a conductive state. At room temperature, the hydrogen absorption capacity was approximately 4.5 wt.%, but when the temperature was raised to 65 °C, it doubled to about 7.5 wt.%. In comparison to other nanocomposites, the 4 wt.% PANI-TiO2 core-shell embedded chitosan membrane exhibited significantly higher absorption capacity of 10.5 wt.%.
Author ORCID Identifier
MALLIKARJUNAGOUDA PATIL: 0000-0002-5737-7007
SRIDHAR MATHAD: 0000-0002-0875-2982
ARUN PATIL: 0000-0001-5582-1381
ABDULAZIZ AL-KHERAIF: 0000-0001-8985-8895
SACHIN NAIK: 0000-0002-8962-0606
SAJITH VELLAPALLY: 0009-0009-1291-8357
DOI
10.55730/1300-0527.3730
Keywords
Metal oxide nanoparticles, polyaniline, core-shell, direct current conductivity, hydrogen storage
First Page
293
Last Page
309
Publisher
The Scientific and Technological Research Council of Türkiye (TÜBİTAK)
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
PATIL, M, MATHAD, S. N, PATIL, A. Y, AL-KHERAIF, A. A, NAIK, S, & VELLAPALLY, S (2025). Enhanced and proficient chitosan membranes embedded with polyaniline-TiO2 core-shell nanocomposites for fuel-cell hydrogen storage. Turkish Journal of Chemistry 49 (3): 293-309. https://doi.org/10.55730/1300-0527.3730
