Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface Properties
Bioinspired porous microstructures of iron-tannate (Fe(III)-TA) coordination polymer framework were synthesized by catenating natural tannic acid with iron(II), using a scalable aqueous synthesis method in ambient conditions. The chemical composition, morphology, physiochemical properties, and collo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Sustainable Chemistry |
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| Online Access: | https://www.mdpi.com/2673-4079/3/2/13 |
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| author | Hemali Rathnayake Sheeba Dawood Gayani Pathiraja Kelvin Adrah Olubunmi Ayodele |
| author_facet | Hemali Rathnayake Sheeba Dawood Gayani Pathiraja Kelvin Adrah Olubunmi Ayodele |
| author_sort | Hemali Rathnayake |
| collection | DOAJ |
| description | Bioinspired porous microstructures of iron-tannate (Fe(III)-TA) coordination polymer framework were synthesized by catenating natural tannic acid with iron(II), using a scalable aqueous synthesis method in ambient conditions. The chemical composition, morphology, physiochemical properties, and colloidal stability of microstructures were elucidated. The surface area (S<sub>BET</sub>) and the desorption pore volume were measured to be 70.47 m<sup>2</sup>/g and 0. 44 cm<sup>3</sup>/g, respectively, and the porous structure was confirmed with an average pore dimension of ~27 nm. Microstructures were thermally stable up to 180 °C, with an initial weight loss of 13.7% at 180 °C. They exhibited high chemical stability with pH-responsive amphoteric properties in aqueous media at pH levels ranging from 2 to 12. Supporting their amphoteric sorption, microstructures exhibited rapid removal of Pb<sup>+2</sup> from water, with 99% removal efficiency, yielding a maximum sorption capacity of 166.66 mg/g. Amphoteric microstructures of bioinspired metal–phenolate coordination polymers remain largely unexplored. Additionally, natural polyphenols have seldomly been used as polytopic linkers to construct both porous and pH-responsive amphoteric coordination polymer frameworks with a robust structure in both acidic and basic media. Thus, this de novo porous microstructure of Fe(III)-TA and its physiochemical surface properties have opened new avenues to design thermally and chemically stable, eco-friendly, low-cost amphoteric sorbents with multifunctionality for adsorption, ion exchange, separation, storage, and sensing of both anions and cations present in heterogeneous media. |
| first_indexed | 2024-03-09T22:28:56Z |
| format | Article |
| id | doaj.art-65f759f7fcf64348b009d44d33c7f94f |
| institution | Directory Open Access Journal |
| issn | 2673-4079 |
| language | English |
| last_indexed | 2024-03-09T22:28:56Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sustainable Chemistry |
| spelling | doaj.art-65f759f7fcf64348b009d44d33c7f94f2023-11-23T19:00:49ZengMDPI AGSustainable Chemistry2673-40792022-05-013219220410.3390/suschem3020013Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface PropertiesHemali Rathnayake0Sheeba Dawood1Gayani Pathiraja2Kelvin Adrah3Olubunmi Ayodele4Nanoscience/Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, NC 27401, USANanoscience/Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, NC 27401, USANanoscience/Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, NC 27401, USANanoscience/Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, NC 27401, USANanoscience/Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, NC 27401, USABioinspired porous microstructures of iron-tannate (Fe(III)-TA) coordination polymer framework were synthesized by catenating natural tannic acid with iron(II), using a scalable aqueous synthesis method in ambient conditions. The chemical composition, morphology, physiochemical properties, and colloidal stability of microstructures were elucidated. The surface area (S<sub>BET</sub>) and the desorption pore volume were measured to be 70.47 m<sup>2</sup>/g and 0. 44 cm<sup>3</sup>/g, respectively, and the porous structure was confirmed with an average pore dimension of ~27 nm. Microstructures were thermally stable up to 180 °C, with an initial weight loss of 13.7% at 180 °C. They exhibited high chemical stability with pH-responsive amphoteric properties in aqueous media at pH levels ranging from 2 to 12. Supporting their amphoteric sorption, microstructures exhibited rapid removal of Pb<sup>+2</sup> from water, with 99% removal efficiency, yielding a maximum sorption capacity of 166.66 mg/g. Amphoteric microstructures of bioinspired metal–phenolate coordination polymers remain largely unexplored. Additionally, natural polyphenols have seldomly been used as polytopic linkers to construct both porous and pH-responsive amphoteric coordination polymer frameworks with a robust structure in both acidic and basic media. Thus, this de novo porous microstructure of Fe(III)-TA and its physiochemical surface properties have opened new avenues to design thermally and chemically stable, eco-friendly, low-cost amphoteric sorbents with multifunctionality for adsorption, ion exchange, separation, storage, and sensing of both anions and cations present in heterogeneous media.https://www.mdpi.com/2673-4079/3/2/13green synthesisamphoteric surface propertiesbiopolymersnatural polyphenolstannic acid |
| spellingShingle | Hemali Rathnayake Sheeba Dawood Gayani Pathiraja Kelvin Adrah Olubunmi Ayodele Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface Properties Sustainable Chemistry green synthesis amphoteric surface properties biopolymers natural polyphenols tannic acid |
| title | Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface Properties |
| title_full | Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface Properties |
| title_fullStr | Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface Properties |
| title_full_unstemmed | Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface Properties |
| title_short | Green Synthesis of De Novo Bioinspired Porous Iron-Tannate Microstructures with Amphoteric Surface Properties |
| title_sort | green synthesis of de novo bioinspired porous iron tannate microstructures with amphoteric surface properties |
| topic | green synthesis amphoteric surface properties biopolymers natural polyphenols tannic acid |
| url | https://www.mdpi.com/2673-4079/3/2/13 |
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