The DOI matches its Crossref record; 53 of the 53 references it cites were found in a registry or an index.
Folic Acid-Polyaniline Hybrid Hydrogel for Adsorption/Reduction of Chromium(VI) and Selective Adsorption of Anionic Dye from Water
Abstract
A porous 3D folic acid (F)-polyaniline (PANI) hybrid hydrogel (F-PANI), produced by in situ polymerization of aniline, exhibit highest compressive stress (15.1 kPa), 3D hierarchical network morphology with BET surface area 236 m 2 /g. Here, PANI is present in emeraldine salt (ES) state, which facilitates excellent adsorption of anionic pollutants. It exhibits an extremely high adsorption capacity for Cr(VI) and during adsorption Cr(VI) is reduced to Cr(III).The electrical impedance spectra of the Cr(VI) adsorbed xerogel, support the conversion of PANI chains from ES to pernigraniline base(PB) making the xerogel more resistive. It also selectively adsorbs anionic dyes, the adsorption capacity increases with decrease of pH. Both the adsorption data are found to be well explained through pseudo-second-order kinetic model, and they obey Langmuir adsorption isotherm. F-PANI2 showed high adsorption capacities selectively toward anionic pollutants, for example, Cr(VI), eosine yellow, rose bengal, methyl orange, and low adsorption capacities for Hg(II), Pb(II), rhodamineB, bismark brownY methylene blue, and neutral red. The removal of Cr(VI) and anionic dyes are very much effective at neutral and acidic pH. After dye/Cr(VI) adsorption the Nyquist plot indicate significant decrease in the capacitance of xerogels. Cyclic experiments show that, F-PANI xerogels can be effectively reused to remove Cr(VI) from different contaminated water.
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“MoS2 QDs exhibit four peaks; the two peaks at 384 and 446 nm correspond to valence band to the conduction band transition, and next two peaks at 605 and 668 nm are assigned to the Brillouin zone of K point.[26,27]”
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Metadata
- Authors
- Das, S., Chakraborty, P., Ghosh, R., Paul, S., Mondal, S., Panja, A., & Nandi, A. K.
- Affiliations
- Indian Association for the Cultivation of Science (IN)
- Corresponding author
- Nandi, Arun K.
- Venue
- ACS Sustainable Chemistry & Engineering
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-08-29
- Volume
- 5
- Issue
- 10
- Pages
- 9325-9337
- ISSN
- 2168-0485 (ISSN-L)
- OpenAlex
- W2746161993
- Cited by
- 137
- References
- 53
- Citations by year
- 2026: 12 · 2025: 10 · 2024: 7 · 2023: 13 · 2022: 22 · 2021: 15 · 2020: 19 · 2019: 23 · 2018: 16
- FWCI
- 8.47
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Sustainable Chemistry & Engineering (publishedVersion)
- Funders
- Council of Scientific and Industrial Research (02(0241)/15/EMR-II)
- Department of Science and Technology, Ministry of Science and Technology
- 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
- folic acid, polyaniline, hybrid hydrogels, Cr(VI) adsorption, Cr(VI) reduction to Cr(III), anionic dye adsorption, selective adsorption, emeraldine salt, in situ aniline polymerization, xerogels, water treatment, dye removal, adsorbent reusability, pH effect on adsorption
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