Highly ordered polyaniline as an efficient dye remover

Abstract

Polyaniline was synthesized by the chemical oxidative polymerization procedure at room temperature employing hydrogen peroxide (H 2 O 2 ) as oxidant and ferrous chloride (FeCl 2 Á2H 2 O) and vanadyl sulphate (VOSO 4 ÁH 2 O) as co-catalysts, respectively. The obtained polymers were characterized by high resolution powder X-ray diffraction, Fourier transform infrared spectroscopy, Raman, UV-Visible, photoluminescence spectroscopy, thermogravimetric Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM) techniques. Ordered arrangement indicative of semi-crystalline nature of polyaniline was evidenced from the presence of intense reflection at d ¼ 13.72 Å in the powder X-ray diffraction pattern followed by two lesser intense peaks at 4.61 and 3.47 Å . Fourier transform infrared spectroscopy and Raman spectroscopic results indicated the polyaniline to be emeraldine salt form. Fibrous morphology was observed in scanning electron microscope images. Nearly 93% of Methyl Orange dye was adsorbed in 30 min by the ordered polyaniline at room temperature. No significant difference in the crystallinity and/or ordering was noticed in the powder X-ray diffraction pattern after dye adsorption. The correlation between the ordered structure of polyaniline and its higher adsorption property derived in the current study has the potential to fabricate devices consisting polyaniline to detect dye molecules.

Evaluation of synthesized polyaniline nanofibres as corrosion protection film coating on copper substrate by electrophoretic deposition

“…The semi-crystallinity is observed as a result of the repetitive arrangement of the quinoid and the benzenoid rings in the polymer chain. This result has been reported by Butoi et al [33], Olivera et al [34], Mitra et al [35], and Elnagar et al [30]. The observed peaks at 2h = 53°and 74°are due to the presence of the metallic substrate.…”

3D Nanocomposite with High Aspect Ratio Based on Polyaniline Decorated with Silver NPs: Synthesis and Application as Electrochemical Glucose Sensor

“…In both cases, PANI in the form of emeraldine salt was obtained. This is proved by the presence of a 1170 cm −1 peak (bending vibrations with hydrogen in ring structures) [ 33 ], peaks in a range of 1300–1400 cm −1 (stretching modes in C-N +• , associated with polarons) [ 34 ], 1505 cm −1 (stretching modes of C=N bands in quinoid fragments) [ 35 ], as well as a peak at 1590 cm −1 with a shoulder at 1618 cm −1 (stretching modes of C=C bands in quinoid and benzenoid fragments, respectively) [ 34 , 35 ]. However, the difference between 2D and 3D structures was observed in the spectral region of 1300–1400 cm −1 .…”

Analysis of 16 mycotoxins in genuine traditional Chinese medicine for five medicinal parts: Classification of analytical method based on PANI@CS extraction-UPLC-MS/MS

“…Carbon sphere (CS) is a good medium carrier of the carbon material family [ 27 ], which is suitable for the polymerization reaction medium further coating nanoparticle materials, and can not only be used to prepare porous core-shell structure composites [ 28 ], but can also be used as a template for molecular imprinting adsorption [ 29 , 30 ]. Modified polyaniline (PANI) material surface contains a large number of oxygen-containing groups, which is widely used in the adsorption of pigments, organic substances and other chemical impurities [ [31] , [32] , [33] , [34] ].…”