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Cited by 4Adsorption and biosorption for pollutant removalConducting polymers and applicationsCoagulation and Flocculation Studies

Impact of aniline-to-pyrrole ratio on the adsorption performance of polyaniline/polypyrrole aerogels towards anionic dyes

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Milakin, Konstantin A., Taboubi, Oumayma, Lhotka, Miloslav, Hromádková, Jiřina, Hodan, Jiří, Pop-Georgievski, Ognen, Bober, Patrycja·2025·Emergent Materials
DOI 10.1007/s42247-025-01130-8
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Abstract

Macroporous composite aerogels, combining polyaniline (PANI) and polypyrrole (PPy), were synthesized by oxidative cryopolymerization of various ratios of the corresponding comonomers in the presence of poly(vinyl alcohol) (PVAl) stabilizer. The estimate of the conducting polymer and PVAl phase contents in the composite aerogels, made by XPS, allowed correlation of the mechanical properties of the materials with their composition. Tensile measurements showed that tensile modulus and tensile stress at break were mostly determined by the presence of PPy units, while the change in tensile strain at break correlated with the change in the PVAl content. The material, synthesized at 90 mol% of aniline in the comonomer mixture, which contained the highest fraction of the conducting polymer phase, was found to have the best adsorption performance towards the anionic dye, Reactive Black 5. Notably, it had higher fraction of the removed dye, compared to the corresponding homopolymer aerogels. Adsorption isotherm data, fitted by the Langmuir model, showed it having maximum adsorption capacity of 389.1 mg g –1 . In addition, the possibility of the adsorbent reusability for at least 5 cycles has been additionally confirmed, which makes the prepared PPy/PANI-PVAl a promising adsorbent for the application in water purification.

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  • The hydrogen sensing mechanism on the surface of PANi in its emeraldine (EM) form proceeds through hydrogen adsorption and hydroxide ion desorption.

    “The hydrogen sensing mechanism on the surface of PANi in its emeraldine (EM) form proceeds through hydrogen adsorption and hydroxide ion desorption.”

    From Dual-function aerogel electrocatalyst enabling efficient hydrogen production and ambient-temperature hydrogen detection (2026) · cites this paper as [51]

    Section 3.2 (Spectroscopy; page unavailable) discusses protonated PANI and its spectral bands, while Section 2.3 (Adsorption measurements; page unavailable) concerns dye adsorption and desorption. Searches for hydrogen sensing, emeraldine, hydrogen adsorption, and hydroxide-ion desorption found no passage describing the claimed sensing mechanism. (LLM, conf=0.76)

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Cited by

Sorted by citations

Authors
Milakin, K. A., Taboubi, O., Lhotka, M., Hromádková, J., Hodan, J., Pop-Georgievski, O., & Bober, P.
Affiliations
  • Czech Academy of Sciences (CZ)
  • University of Chemistry and Technology, Prague (CZ)
Corresponding author
  • Milakin, Konstantin A.
  • Bober, Patrycja
ORCID
Venue
Emergent Materials
Publisher
Springer Science and Business Media LLC
Published
2025-06-02
Volume
8
Issue
8
Pages
6439-6451
ISSN
  • 2522-5731 (ISSN-L)
  • 2522-574X
DOI
10.1007/s42247-025-01130-8
OpenAlex
W4410968237
Cited by
4
References
1
Citations by year
2026: 3 · 2025: 1
FWCI
1.02
Type
journal article
Language
en
Open access
Licence
Locations
Emergent Materials (publishedVersion, cc-by)
Funders
Institute of Macromolecular Chemistry of the Czech Academy of Sciences
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Materials Science › Polymers and Plastics › Conducting polymers and applications
  • Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
Keywords
polyaniline, polypyrrole, composite aerogels, anionic dye adsorption, Reactive Black 5, polyvinyl alcohol stabilizer, macroporous materials, tensile properties, Langmuir isotherm, adsorbent reusability, water purification

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