A novel approach for the synthesis of polyaniline nanostructures using swollen liquid crystal templates

Dutt, Sunil; Siril, Prem Felix

doi:10.1016/j.matlet.2014.03.068

Cited by 21 publications

(24 citation statements)

References 26 publications

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“…These were characteristic peaks of PANI (EB) [40]. It is already known that PANI (ES) on dissolving in NMP gets converted into undoped form PANI (EB) [41,42]. A slight blue shift of the absorption peak at 630 nm was observed in the case of PANI 4.…”

Section: Uv-spectral Studymentioning

confidence: 83%

Adsorption and reduction: combined effect of polyaniline emeraldine salt for removal of Cr(VI) from aqueous medium

Baruah

Mahanta

2016

Bull Mater Sci

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In this study, we have reported the removal of Cr(VI) ions by polyaniline (PANI) particles from aqueous medium. PANI in its emeraldine salt (ES) form can interact with Cr(VI), which is present as HCrO − 4 in two ways. The adsorption of HCrO − 4 ions due to the electrostatic interaction between partially positively charged PANI backbone and Cr(VI) anions causes the major portion of Cr(VI) removal and a small portion of Cr(VI) is reduced to Cr(III) by PANI (ES). The adsorption follows Langmuir adsorption isotherm and second-order kinetic model. It is observed that the removal of Cr(VI) is negligibly effected by the presence of other anions in the aqueous medium. The adsorption capacity of PANI (ES) is found to be 123 mg g −1 , which is very high compared to activated carbonbased materials. The adsorbed anions can be desorbed by converting PANI emeraldine salt (ES) to PANI emeraldine base (EB). The EB form of PANI can be converted into ES form by treating with acid, which can be reused as adsorbent. It is important to note that the PANI (ES) is oxidized by HCrO −4 ions which decrease the hydrophilicity of the surface of PANI particles. This causes the decrease in adsorption capacity of recycled PANI.

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Section: Uv-spectral Studymentioning

confidence: 83%

Adsorption and reduction: combined effect of polyaniline emeraldine salt for removal of Cr(VI) from aqueous medium

Baruah

Mahanta

2016

Bull Mater Sci

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“…1, in Ref. [34]. The nature of the absorption spectra recorded in NMP was different from the spectra that were recorded in water.…”

Section: Resultsmentioning

confidence: 93%

“…The co-surfactant (1-pentanol) was then added to the mixture with intermittent vortex mixing to yield the SLC containing aniline. SLC containing aniline hydrochloride was also prepared by following the reported procedure [27]. The method of preparation was similar to the aniline containing mesophases.…”

Section: Methodsmentioning

confidence: 99%

“…The SLCs are versatile templates and were used to synthesize nanostructures of metals, polymers and nanocomposites [23][24][25]. We have recently developed a general method to prepare PANI nanostructures and its nanocomposites with noble metals using SLCs [6,[26][27]. We could control the morphology of PANI by controlled mixing of the oxidant with the aniline containing mesophases.…”

Section: Introductionmentioning

confidence: 99%

“…We could control the morphology of PANI by controlled mixing of the oxidant with the aniline containing mesophases. Aniline containing mesophases could be prepared by either replacing a portion of the oil phase with aniline or by using aqueous solution of aniline hydrochloride instead of brine [26,27]. Spherical PANI nanostructures could be prepared by vortex mixing of the oxidizer (ammonium persulfate) with the aniline containing mesophases.…”

Section: Introductionmentioning

confidence: 99%

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