Physicochemical properties of silica gel coated with a thin layer of polyaniline (PANI) and its application in non-suppressed ion chromatography

Sowa, Ireneusz; Kocjan, Ryszard; Wójciak–Kosior, Magdalena; Świeboda, Ryszard; Zajdel, D.; Hajnos, M.

doi:10.1016/j.talanta.2013.05.071

Cited by 15 publications

(5 citation statements)

References 37 publications

(45 reference statements)

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“…Consequently, the silica may hinder the ionic transportation at the surface of the PANI-silica/electrolyte. Furthermore, the amorphous PANI has poor conductivity compared to the crystallized bulk PANI, leading to a larger internal resistance than that of the bulk PANI [55]. As a consequence of these disadvantages, the PANI-silica has a larger charge transfer resistance than that of bulk PANI.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Electrochemical Characterization of Mesoporous Polyaniline-Silica Nanocomposites as an Electrode Material for Pseudocapacitors

Cui

Jiang

et al. 2015

Materials

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Mesoporous polyaniline-silica nanocomposites with a full interpenetrating structure for pseudocapacitors were synthesized via the vapor phase approach. The morphology and structure of the nanocomposites were deeply investigated by scanning electron microscopy, infrared spectroscopy, X-ray diffraction, thermal gravimetric analysis and nitrogen adsorption-desorption tests. The results present that the mesoporous nanocomposites possess a uniform particle morphology and full interpenetrating structure, leading to a continuous conductive polyaniline network with a large specific surface area. The electrochemical performances of the nanocomposites were tested in a mixed solution of sulfuric acid and potassium iodide. With the merits of a large specific surface area and suitable pore size distribution, the nanocomposite showed a large specific capacitance (1702.68 farad (F)/g) due to its higher utilization of the active material. This amazing value is almost three-times larger than that of bulk polyaniline when the same mass of active material was used.

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Section: Resultsmentioning

confidence: 99%

Preparation and Electrochemical Characterization of Mesoporous Polyaniline-Silica Nanocomposites as an Electrode Material for Pseudocapacitors

Cui

Jiang

et al. 2015

Materials

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“…Chromatography was performed on 10 cm × 10 cm HPTLC F254 plates coated with silica gel and silica gel modified with DIOL groups (Merck, Darmstadt, Germany). First, the most common [Sowa et al 2013] silica gel with high performance quality was used. The multiply gradient development (MGD) technique with an experimentally chosen composition of mobile phases (tab.…”

Section: Qualitative Phytochemical Analysis By Thin-layer Chromatography -Densitometric Methodsmentioning

confidence: 99%

STRUCTURE OF LEAVES AND PHENOLIC ACIDS IN Kalanchoë daigremontiana Raym.-Hamet & H. Perrier

Chernetskyy

Woźniak

Skalska-Kamińska

et al. 2018

Acta Sci.Pol.Hortorum Cultus

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Kalanchoë daigremontiana leaves contain phenolic compounds, which are one of the determinants of plant therapeutic properties. Light and scanning electron microscopes were used to analyse the structure of leaves. The main aims of the study included the analysis of the anatomy of leaves, localisation of phenolic compounds, and identification of phenolic acids. The thickness of the amphistomatic leaf blades, the number, the size of stomata, and the value of stomatal index, as well as the structure of the parenchyma cells have indicated that K. daigremontiana is adapted to arid environments. The histochemical assays revealed the presence of phenolic idioblasts in the leaf blades and petioles. The idioblasts were located in the epidermis, subepidermal layer, a deeper portion of the mesophyll, and in the sheaths of vascular bundles. The phytochemical analyses of leaves demonstrated the presence of gallic, ferulic, caffeic, p-coumaric, and protocatechuic acids in the form of esters. We carried out the research of the anatomical structure of K. daigremontiana leaves, which has been insufficiently documented to date. We have also revealed new localisation of phenolic compounds in the leaf tissues of this species.

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“…In situ polymerization of aniline was conducted directly on silica particles with the use of ammonium peroxydisulphate as an oxidation agent at a temperature of 0–2 °C. The procedure was described in detail in our previous publications [ 7 , 28 ]. The deposition of polyaniline on silica particles was verified by Raman analysis using a Thermo Scientific DXR confocal Raman microscope with the Omnic 8 software (Thermo Fisher Scientific Madison, Madison, WI, USA).…”

Section: Methodsmentioning

confidence: 99%

Silica Modified with Polyaniline as a Potential Sorbent for Matrix Solid Phase Dispersion (MSPD) and Dispersive Solid Phase Extraction (d-SPE) of Plant Samples

et al. 2018

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Polyaniline (PANI) is one of the best known conductive polymers with multiple applications. Recently, it was also used in separation techniques, mostly as a component of composites for solid-phase microextraction (SPME). In the present paper, sorbent obtained by in situ polymerization of aniline directly on silica gel particles (Si-PANI) was used for dispersive solid phase extraction (d-SPE) and matrix solid–phase extraction (MSPD). The efficiency of both techniques was evaluated with the use of high performance liquid chromatography with diode array detection (HPLC-DAD) quantitative analysis. The quality of the sorbent was verified by Raman spectroscopy and microscopy combined with automated procedure using computer image analysis. For extraction experiments, triterpenes were chosen as model compounds. The optimal conditions were as follows: protonated Si-PANI impregnated with water, 160/1 sorbent/analyte ratio, 3 min of extraction time, 4 min of desorption time and methanolic solution of ammonia for elution of analytes. The proposed procedure was successfully used for pretreatment of plant samples.

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Physicochemical properties of silica gel coated with a thin layer of polyaniline (PANI) and its application in non-suppressed ion chromatography

Cited by 15 publications

References 37 publications

Preparation and Electrochemical Characterization of Mesoporous Polyaniline-Silica Nanocomposites as an Electrode Material for Pseudocapacitors

Preparation and Electrochemical Characterization of Mesoporous Polyaniline-Silica Nanocomposites as an Electrode Material for Pseudocapacitors

STRUCTURE OF LEAVES AND PHENOLIC ACIDS IN Kalanchoë daigremontiana Raym.-Hamet & H. Perrier

Silica Modified with Polyaniline as a Potential Sorbent for Matrix Solid Phase Dispersion (MSPD) and Dispersive Solid Phase Extraction (d-SPE) of Plant Samples

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