Synthesis and application of epoxy resins: A review

In the present study, exfoliated graphene oxide (EGO) and reduced graphene oxide (rGO) have been used for the adsorption of various charged dyes such as methylene blue, methyl violet, rhodamine B, and orange G from aqueous solutions. EGO consists of single layer of graphite decorated with oxygen containing functional groups such as carboxyl, epoxy, ketone, and hydroxyl groups in its basal and edge planes. Consequently, the large negative charge density available in aqueous solutions helps in the effective adsorption of cationic dyes on EGO while the adsorption is negligible for anionic dyes. On the other hand, rGO that has high surface area does not possess as high a negative charge and is found to be very good adsorbent for anionic dyes. The adsorption process is followed using UV-Visible spectroscopy, while the material before and after adsorption has been characterized using physicochemical and spectroscopic techniques. Various isotherms have been used to fit the data, and kinetic parameters were evaluated. Raman and FT-IR spectroscopic data yield information on the interactions of dyes with the adsorbent.

Graphene and graphene oxide as effective adsorbents toward anionic and cationic dyes

Adsorption of methylene blue by a high-efficiency adsorbent (polydopamine microspheres): Kinetics, isotherm, thermodynamics and mechanism analysis

Polyaniline nanostructures and the role of aniline oligomers in their formation

Synthesis, structure, and bonding in polyiodide and metal iodide-iodine systems.

Polyaniline nanotubes (PANI NTs) base has been utilized as an adsorbent for the removal of cationic dyes such as methylene blue (MB) from aqueous solution. This observation was evidenced from the measurements of quartz crystal microbalance (QCM) and UV−visible spectroscopy. Experiments were conducted by varying parameters of initial concentration of MB and contact time. The percentage of color removal decreased with the increase of initial dye concentration. Adsorption equilibrium of the dye was reached after 120 min of contact time. Equilibrium data were fit to Langmuir, Freundlich, and Tempkin isotherms, and their constants were determined. The linear correlations coefficient showed that the Langmuir isotherm best fits the MB adsorption data on PANI NTs. The pseudo-first-order, pseudo-second-order, and the intraparticle diffusion kinetic models were applied to the experimental data. It was observed that the pseudo-second-order kinetic model described the adsorption process better than any other kinetic ...

Adsorption of Cationic Dye (Methylene Blue) from Water Using Polyaniline Nanotubes Base

Kinetics and isotherm studies of methylene blue adsorption onto polyaniline nanotubes base/silica composite

Adsorption of methylene blue onto chitosan–montmorillonite/polyaniline nanocomposite

A sensor of alcohol vapours based on thin polyaniline base film and quartz crystal microbalance.

Nanostructured crosslinked polyaniline with high surface area: Synthesis, characterization and adsorption for organic dye

Mohamad M. Ayad

Papers

Adsorption of Cationic Dye (Methylene Blue) from Water Using Polyaniline Nanotubes Base

Kinetics and isotherm studies of methylene blue adsorption onto polyaniline nanotubes base/silica composite

Adsorption of methylene blue onto chitosan–montmorillonite/polyaniline nanocomposite

A sensor of alcohol vapours based on thin polyaniline base film and quartz crystal microbalance.

Nanostructured crosslinked polyaniline with high surface area: Synthesis, characterization and adsorption for organic dye