Facile synthesis of raspberry-like aniline oligomers with excellent adsorption–desorption properties

Huang, Lei; Yu, Xiaodan; Gao, Li; Chen, Lin; Wei, Jiatong; Xing, Shuangxi

doi:10.1039/c4nj00544a

Cited by 5 publications

(6 citation statements)

References 33 publications

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“…S-2d and e †), in accordance with recent studies demonstrating the superior sorption abilities of PANI structures. 19,20 The forms of these yolk-shell nanocapsules are mainly preserved over a wide pH range from 1 to 14. They are also stable aer treatment with EDTA.…”

Section: Resultsmentioning

confidence: 99%

“…18,19 In addition, PANI's stability at high temperature, chemical versatility, and intrinsic porosity make it a good candidate for designing nanostructured catalysts. [20][21][22] Here, all-polymer template-free PANI yolk-shell nanocapsules were used as a matrix for the hierarchical integration of metallic cations by achieving a conned doping of Cu, Ni and Au ions. Subsequent in situ growth of metallic NPs could be achieved by chemical reduction (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured polymeric yolk–shell capsules: a versatile tool for hierarchical nanocatalyst design

et al. 2016

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanostructured polymeric yolk–shell capsules: a versatile tool for hierarchical nanocatalyst design

et al. 2016

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“…[35][36][37][38][39] Ayad and El-Nasr have utilized PANI nanotubes base as adsorbents for the removal of cationic dye methylene blue from the aqueous solution. [35][36][37][38][39] Ayad and El-Nasr have utilized PANI nanotubes base as adsorbents for the removal of cationic dye methylene blue from the aqueous solution.…”

Section: Adsorption Properties Of (Flower-on-leaf)-like Oligomers Formentioning

confidence: 99%

Ethanol-guided synthesis of (flower-on-leaf)-like aniline oligomers with excellent adsorption properties

Zhou

Gong

et al. 2015

New J. Chem.

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A novel oligoaniline with hierarchical flower-on-leaf microstructures has been fabricated via the oxidation of aniline in EtOH/water (3 : 7, v/v) mixtures. The as-prepared oligoaniline was characterized using the UV-vis, FTIR, 1 H NMR and MALDI-TOF MS techniques for analyzing the chemical structures.A possible formation mechanism has been proposed to interpret the growth of such hierarchical microstructures, and several inter-molecular interactions were suggested to drive the supermolecular assembly. The effect of the ethanol content in the medium on the morphology of the product was discussed, and the functions of the ethanol in the synthesis were explored. Besides, the adsorption properties of the as-prepared product toward organic dyes (crystal violet etc.) in water, as well as the sorption isotherms and kinetics, have been investigated carefully. The realizable sorption capacity for crystal violet was found to be 181 mg g À1 which was higher than those of most of the sorbent.

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“…Though these oligoanilines obtained in higher pH media are non‐conductive, they can be applied in different fields that do not need the conductivity of PANI. It has been reported that aniline oligomers can efficiently adsorb organic dyes and heavy metal ions and also reduce high valent metal ions to their low valence forms …”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that aniline oligomers can efficiently adsorb organic dyes and heavy metal ions and also reduce high valent metal ions to their low valence forms. [30][31][32][33] Herein we report a facile method to fabricate oligoaniline hollow microspheres in alkaline solution at ambient temperature without using any additives as a template. Moreover, the morphology of oligoanilines can be controlled by adjusting the amount of alkaline solution.…”

Section: Introductionmentioning

confidence: 99%

Efficient adsorption/reduction of aqueous hexavalent chromium using oligoaniline hollow microspheres fabricated by a template‐free method

Bao

Chen

Liu

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Uniform and well‐dispersed hollow microspheres of oligoaniline were synthesized by a facile and template‐free method in alkaline medium. The morphology of oligoanilines was controlled from hollow to hard microspheres, by simply changing the volumes of alkaline medium. SEM, TEM, XRD, FTIR and physical adsorption of nitrogen were used to characterize the products. Hexavalent chromium ion uptake experiments were run with these aniline oligomers. RESULTS Adsorption experiments showed that the removal of chromium ions was strongly dependent on the initial pH of the solution. The pseudo‐second‐order kinetic and Langmuir isotherm models were well correlated with the experimental data. The adsorption of Cr(VI) and synergistic reduction to Cr(III) were confirmed by analyzing remnant chromium in the liquid and XPS detection of the exhausted adsorbent. A redox/pseudo‐protonation process was suggested as the mechanism to explain the Cr(VI) removal. The adsorbed chromium ions could be desorbed by NaOH solution. The higher desorption efficiency of 96.2% was achieved by using 1.0 mol L‐1 NaOH as the desorption agent. CONCLUSIONS It was observed that the hollow microsphere were the most effective adsorbent of the three adsorbents and its removal efficiency reached 99% to remove 60 mg L‐1 Cr(VI). The facile fabrication, efficient removal of Cr(VI) and simple regeneration offered an option to remove Cr(VI) contamination from natural water and industrial wastewater. © 2017 Society of Chemical Industry

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Facile synthesis of raspberry-like aniline oligomers with excellent adsorption–desorption properties

Cited by 5 publications

References 33 publications

Nanostructured polymeric yolk–shell capsules: a versatile tool for hierarchical nanocatalyst design

Nanostructured polymeric yolk–shell capsules: a versatile tool for hierarchical nanocatalyst design

Ethanol-guided synthesis of (flower-on-leaf)-like aniline oligomers with excellent adsorption properties

Efficient adsorption/reduction of aqueous hexavalent chromium using oligoaniline hollow microspheres fabricated by a template‐free method

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