Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2
This study explores the phase composition, local atomic structure, and magnetic properties of biogenic nanomaterials synthesized through microbially mediated biomineralization by the sulfate-reducing bacterium <i>Desulfovibrio</i> species strain A2 (<i>Cupidesulfovibrio</i>)....
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Inorganics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6740/13/2/34 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849718989180108800 |
|---|---|
| author | Mikhail S. Platunov Yuriy V. Knyazev Olga P. Ikkert Olga V. Karnachuk Anton D. Nikolenko Roman D. Svetogorov Evgeny V. Khramov Mikhail N. Volochaev Andrey A. Dubrovskiy |
| author_facet | Mikhail S. Platunov Yuriy V. Knyazev Olga P. Ikkert Olga V. Karnachuk Anton D. Nikolenko Roman D. Svetogorov Evgeny V. Khramov Mikhail N. Volochaev Andrey A. Dubrovskiy |
| author_sort | Mikhail S. Platunov |
| collection | DOAJ |
| description | This study explores the phase composition, local atomic structure, and magnetic properties of biogenic nanomaterials synthesized through microbially mediated biomineralization by the sulfate-reducing bacterium <i>Desulfovibrio</i> species strain A2 (<i>Cupidesulfovibrio</i>). Using X-ray diffraction (XRD), transmission electron microscopy (TEM), Mössbauer spectroscopy, X-ray absorption near-edge structure (XANES) spectroscopy, extended X-ray absorption fine structure (EXAFS) spectroscopy, and magnetic measurements, we identified a mixture of vivianite (Fe<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>·8H<sub>2</sub>O) and sulfur-containing crystalline phases (α-sulfur). XRD analysis confirmed that the vivianite phase, with a monoclinic I2/m structure, constitutes 44% of the sample, while sulfur-containing phases (α-sulfur, Fddd) account for 56%, likely as a result of bacterial sulfate-reducing activity. X-ray absorption spectroscopy (XAS) and EXAFS revealed the presence of multiple sulfur oxidation states, including elemental sulfur and sulfate (S<sup>6+</sup>), underscoring the role of sulfur in the sample’s structure. Mössbauer spectroscopy identified the presence of ferrihydrite nanoparticles with a blocking temperature of approximately 45 K. Magnetic measurements revealed significant coercivity (~2 kOe) at 4.2 K, attributed to the blocked ferrihydrite nanoparticles. The results provide new insights into the structural and magnetic properties of these microbially mediated biogenic nanomaterials, highlighting their potential applications in magnetic-based technologies. |
| format | Article |
| id | doaj-art-b147519f2ddb48b8b2d8e2e1ea0af715 |
| institution | DOAJ |
| issn | 2304-6740 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Inorganics |
| spelling | doaj-art-b147519f2ddb48b8b2d8e2e1ea0af7152025-08-20T03:12:14ZengMDPI AGInorganics2304-67402025-01-011323410.3390/inorganics13020034Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2Mikhail S. Platunov0Yuriy V. Knyazev1Olga P. Ikkert2Olga V. Karnachuk3Anton D. Nikolenko4Roman D. Svetogorov5Evgeny V. Khramov6Mikhail N. Volochaev7Andrey A. Dubrovskiy8Synchrotron Radiation Facility SKIF, Kol’tsovo 630559, RussiaKirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, RussiaDepartment of Plant Physiology, Biotechnology, and Bioinformatics, Tomsk State University, Tomsk 634050, RussiaDepartment of Plant Physiology, Biotechnology, and Bioinformatics, Tomsk State University, Tomsk 634050, RussiaSynchrotron Radiation Facility SKIF, Kol’tsovo 630559, RussiaNational Research Center “Kurchatov Institute”, Moscow 123182, RussiaNational Research Center “Kurchatov Institute”, Moscow 123182, RussiaKirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, RussiaKirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, RussiaThis study explores the phase composition, local atomic structure, and magnetic properties of biogenic nanomaterials synthesized through microbially mediated biomineralization by the sulfate-reducing bacterium <i>Desulfovibrio</i> species strain A2 (<i>Cupidesulfovibrio</i>). Using X-ray diffraction (XRD), transmission electron microscopy (TEM), Mössbauer spectroscopy, X-ray absorption near-edge structure (XANES) spectroscopy, extended X-ray absorption fine structure (EXAFS) spectroscopy, and magnetic measurements, we identified a mixture of vivianite (Fe<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>·8H<sub>2</sub>O) and sulfur-containing crystalline phases (α-sulfur). XRD analysis confirmed that the vivianite phase, with a monoclinic I2/m structure, constitutes 44% of the sample, while sulfur-containing phases (α-sulfur, Fddd) account for 56%, likely as a result of bacterial sulfate-reducing activity. X-ray absorption spectroscopy (XAS) and EXAFS revealed the presence of multiple sulfur oxidation states, including elemental sulfur and sulfate (S<sup>6+</sup>), underscoring the role of sulfur in the sample’s structure. Mössbauer spectroscopy identified the presence of ferrihydrite nanoparticles with a blocking temperature of approximately 45 K. Magnetic measurements revealed significant coercivity (~2 kOe) at 4.2 K, attributed to the blocked ferrihydrite nanoparticles. The results provide new insights into the structural and magnetic properties of these microbially mediated biogenic nanomaterials, highlighting their potential applications in magnetic-based technologies.https://www.mdpi.com/2304-6740/13/2/34biomineralizationphosphorus recoverysulfate-reducing bacterium |
| spellingShingle | Mikhail S. Platunov Yuriy V. Knyazev Olga P. Ikkert Olga V. Karnachuk Anton D. Nikolenko Roman D. Svetogorov Evgeny V. Khramov Mikhail N. Volochaev Andrey A. Dubrovskiy Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2 Inorganics biomineralization phosphorus recovery sulfate-reducing bacterium |
| title | Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2 |
| title_full | Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2 |
| title_fullStr | Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2 |
| title_full_unstemmed | Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2 |
| title_short | Structural and Magnetic Properties of Biogenic Nanomaterials Synthesized by <i>Desulfovibrio</i> sp. Strain A2 |
| title_sort | structural and magnetic properties of biogenic nanomaterials synthesized by i desulfovibrio i sp strain a2 |
| topic | biomineralization phosphorus recovery sulfate-reducing bacterium |
| url | https://www.mdpi.com/2304-6740/13/2/34 |
| work_keys_str_mv | AT mikhailsplatunov structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT yuriyvknyazev structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT olgapikkert structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT olgavkarnachuk structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT antondnikolenko structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT romandsvetogorov structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT evgenyvkhramov structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT mikhailnvolochaev structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 AT andreyadubrovskiy structuralandmagneticpropertiesofbiogenicnanomaterialssynthesizedbyidesulfovibrioispstraina2 |