TY - JOUR A1 - Bekhoukh, Amina A1 - Kiari, Mohamed A1 - Moulefera, Imane A1 - Sabantina, Lilia A1 - Benyoucef, Abdelghani ED - Criado-Gonzalez, Miryam ED - Rojo del Olmo, Luis T1 - New Hybrid Adsorbents Based on Polyaniline and Polypyrrole with Silicon Dioxide: Synthesis, Characterization, Kinetics, Equilibrium, and Thermodynamic Studies for the Removal of 2,4-Dichlorophenol JF - Polymers N2 - In the current study, polyaniline and polypyrrole with silicon dioxide (PAni:PPy@SiO2) were combined to formulate a new adsorbent, which was examined using XRD, TEM, SEM, FTIR, TGA, and BET, and the adsorption kinetics were investigated by UV–vis spectroscopy. The optical band gap was also evaluated. The electrochemical behavior was investigated using cyclic voltammograms. Moreover, experimental conditions were used to evaluate the 2,4-dichlorophenol (2,4-DCP) adsorption based on the pH, temperature, reaction time, and initial concentration. The analytical isotherm data were determined by Langmuir, Freundlich, Temkin, Sips, and Redlich–Peterson models. For the analysis of the kinetic data, the pseudo-first- and -second-order models and the intraparticle diffusion model were investigated. It was found that this new adsorbent possessed the highest adsorption efficiency after several regeneration cycles. Furthermore, the thermodynamic parameters of adsorption, such as entropy (ΔS), enthalpy (ΔH), and standard Gibbs were measured. These results suggest that the PAni:PPy backbone can generally be better applied for the elimination of 2,4-dichlorophenol by appropriately dispersing it over the surface of suitable SiO2. This search provides a novel way to develop separable, high-performance adsorbents for adsorbing organic contamination from wastewater. KW - polypyrrole KW - polyaniline KW - 2,4-dichlorophenol KW - silicon dioxide KW - adsorption KW - Polyaniline KW - Polypyrrole KW - Dichlorphenole KW - Adsorption Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:523-17000 SN - 2073-4360 VL - 15 IS - 9 PB - MDPI ER - TY - JOUR A1 - Benchikh, Imen A1 - Ezzat, Abdelrahman Osama A1 - Sabantina, Lilia A1 - Benmimoun, Youcef A1 - Benyoucef, Abdelghani ED - Wu, Ming-Chung T1 - Investigation of Hybrid Electrodes of Polyaniline and Reduced Graphene Oxide with Bio-Waste-Derived Activated Carbon for Supercapacitor Applications JF - Polymers N2 - Graphene-based materials have been widely studied in the field of supercapacitors. However, their electrochemical properties and applications are still restricted by the susceptibility of graphene-based materials to curling and agglomeration during production. This study introduces a facile method for synthesizing reduced graphene oxide (rGO) nanosheets and activated carbon based on olive stones (OS) with polyaniline (PAni) surface decoration for the development of supercapacitors. Several advanced techniques were used to examine the structural properties of the samples. The obtained PAni@OS−rGO (1:1) electrode exhibits a high electrochemical capacity of 582.6 F·g−1 at a current density of 0.1 A·g−1, and an energy density of 26.82 Wh·kg−1; thus, it demonstrates potential for efficacious energy storage. In addition, this electrode material exhibits remarkable cycling stability, retaining over 90.07% capacitance loss after 3000 cycles, indicating a promising long cycle life. Overall, this research highlights the potential of biomass-derived OS in the presence of PAni and rGO to advance the development of high-performance supercapacitors. KW - Organischer Abfall KW - bio-waste KW - activated carbon KW - reduced graphene oxide KW - polyaniline KW - supercapacitor KW - Aktivkohle KW - Graphen KW - Polyaniline KW - Superkondensator Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:523-18194 SN - 2073-4360 VL - 16 IS - 3 PB - MDPI ER -