Preparation of doped polypyrrole composites as effective chromium ion absorbents

Zhou, Yanqing; Sun, Wei

doi:10.1002/pc.24529

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…To shed light on the adsorption mechanism, the equations of adsorption kinetics (eqs and ) , are used to fit the kinetic results of GCS@PPy and GCS@PPy/ L -cys.…”

Section: Resultsmentioning

confidence: 99%

“…The results display that GCS@PPy/L-cys with a low specific surface area has a high reduction−adsorption capacity, indicating that GCS@ PPy/L-cys can have a promising application in treating Cr(VI) from water. To shed light on the adsorption mechanism, the equations of adsorption kinetics (eqs 2 and 3) 33,34 are used to fit the kinetic results of GCS@PPy and GCS@PPy/L-cys.…”

Section: +26mentioning

confidence: 99%

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An Enhanced Reduction–Adsorption Strategy for Cr(VI): Fabrication and Application of L-Cysteine-doped Carbon@Polypyrrole with a Core/Shell Composite Structure

Peng

Guo

et al. 2020

Langmuir

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Reclamation and recycling of heavy metal ions can offer environmental protection and sustainable development. Here, we report the preparation of L-cysteine (L-cys)-doped glucose carbon sphere (GCS)@polypyrrole (PPy) composites (GCS@PPy/L-cys). The adsorption performance and mechanism of GCS@PPy/L-cys toward Cr(VI) from water were investigated in detail. The chromate enrichment on GCS@PPy is significantly facilitated by doping with L-cys, which prevents the oxidative collapse of the structure. This approach leads to many reduction–adsorption sites that reduce the highly hazardous Cr(VI) into less toxic Cr(III). More significantly, the composite can be reused to fabricate supercapacitors that avoid secondary pollution. This strategy offers high-efficiency treatment and sustainable utilization of hypervalent metals in water.

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“…To shed light on the adsorption mechanism, the equations of adsorption kinetics (eqs and ) , are used to fit the kinetic results of GCS@PPy and GCS@PPy/ L -cys.…”

Section: Resultsmentioning

confidence: 99%

Section: +26mentioning

confidence: 99%

An Enhanced Reduction–Adsorption Strategy for Cr(VI): Fabrication and Application of L-Cysteine-doped Carbon@Polypyrrole with a Core/Shell Composite Structure

Peng

Guo

et al. 2020

Langmuir

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“…The interest in developing polypyrrole composites have the specific objective of chromium removal from aqueous solution. In the literature, there are reports of composites with Co 3 O 4 /AgCl, 28 polyaniline nanofibers, 29,30 chitosan based, 31 Fe 3 O 4 , 32,33 different carbon materials, 34,35 and some more. Hitherto, to the best of the author's knowledge, there are no reports of ZnO‐PPY composites specifically developed and applied to remove in Cr(VI) anions from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Photoinduced adsorption of Cr(VI) ions in nano‐zinc oxide and nano‐zinc oxide/polypyrrole composite

Ramos‐Hernández

Pérez‐Aguilar

Ovando‐Medina

et al. 2022

J of Applied Polymer Sci

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Zinc oxide-polypyrrole composites (ZnO-PPY) are novel materials that have attracted significant attention in recent years. These materials have the potential to remove hazardous pollutants from water effectively. Here, we explore facile synthesis, characterization, and adsorption capacity of hexavalent chromium anions, by nano-ZnO and nano-ZnO-PPY composite. Cold precipitation of ZnO using sodium dodecyl sulfate as an additive prevents nanoparticle growth, which permits the composite preparation with PPY. The results demonstrated that the ZnO-PPY structure was different than ZnO, more amorphous, less porous, and with a different morphology. New Fourier transform infrared spectroscopy vibrations observed in ZnO-PPY hinted an interaction with ZnO, leading to a more acidic surface. This information could point to the composite formation driven by interactions between oxygen groups and pyrrole nitrogen. Both materials performed better under light, indicating a photoinduced adsorption phenomenon favored by oxygen vacancies. The new composite demonstrated a reduced adsorption capacity compared to ZnO at neutral and slightly acidic pHs due to electrostatic repulsion of the negatively charged surface and Cr(VI) anions. At alkaline pHs, the pyrrolic nitrogen's is able to interact with partially charged Cr-complex and to carry out a ligand interchange even in a not favorable charge environment. The ZnO-PPY composite, outperformed the zinc oxide capacity.adsorption, composites, porous materials, surfaces and interfaces | INTRODUCTIONChromium is a heavy metal commonly produced and employed in industrial processes. The industries with the major Cr-emissions to the atmosphere are: coal combustion, steel, and iron management, cement production, tanning processing, catalysis, Cr-plating, and so forth. 1 Presently, chromium is one of the most hazardous pollutants found in wastewater and water reservoirs. Its ingestion causes several health afflictions at both short and long-term exposures, including acute effects such as gastrointestinal disorders, hemorrhagic diathesis, and convulsions. 2 Furthermore, hexavalent chromium has been classified by the International Agency for Research on Cancer as carcinogenic to humans (Group 1), and the WHO recommends an LD 50 of 20-250 mg/kg of hexavalent chromium. For that reason,

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Removal of hexavalent chromium from aqueous media using pomegranate peels modified by polymeric coatings: Effects of various composite synthesis parameters

2020

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Preparation of doped polypyrrole composites as effective chromium ion absorbents

Cited by 5 publications

References 32 publications

An Enhanced Reduction–Adsorption Strategy for Cr(VI): Fabrication and Application of L-Cysteine-doped Carbon@Polypyrrole with a Core/Shell Composite Structure

An Enhanced Reduction–Adsorption Strategy for Cr(VI): Fabrication and Application of L-Cysteine-doped Carbon@Polypyrrole with a Core/Shell Composite Structure

Photoinduced adsorption of Cr(VI) ions in nano‐zinc oxide and nano‐zinc oxide/polypyrrole composite

Removal of hexavalent chromium from aqueous media using pomegranate peels modified by polymeric coatings: Effects of various composite synthesis parameters

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