Abstract
The thermo-acidophilic archaeon, Sulfolobus tokodaii, was utilized for the production of Pd(0) bionanoparticles from acidic Pd(II) solution. Use of active cells was essential to form well-dispersed Pd(0) nanoparticles located on the cell surface. The particle size could be manipulated by modifying the concentration of formate (as electron donor; e-donor) and by addition of enzymatic inhibitor (Cu2+) in the range of 14–63 nm mean size. Since robust Pd(II) reduction progressed in pre-grown S. tokodaii cells even in the presence of up to 500 mM Cl−, it was possible to conversely utilize the effect of Cl− to produce even finer and denser particles in the range of 8.7–15 nm mean size. This effect likely resulted from the increasing stability of anionic Pd(II)–chloride complex at elevated Cl− concentrations, eventually allowing involvement of greater number of initial Pd(0) crystal nucleation sites (enzymatic sites). The catalytic activity [evaluated based on Cr(VI) reduction reaction] of Pd(0) bionanoparticles of varying particle size formed under different conditions were compared. The finest Pd(0) bionanoparticles obtained at 50 mM Cl− (mean 8.7 nm; median 5.6 nm) exhibited the greatest specific Cr(VI) reduction rate, with four times higher catalytic activity compared to commercial Pd/C. The potential applicability of S. tokodaii cells in the recovery of highly catalytic Pd(0) nanoparticles from actual acidic chloride leachate was, thus, suggested.
| Original language | English |
|---|---|
| Pages (from-to) | 549-556 |
| Number of pages | 8 |
| Journal | Extremophiles |
| Volume | 23 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Sep 2 2019 |
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All Science Journal Classification (ASJC) codes
- Microbiology
- Molecular Medicine
Cite this
Production of highly catalytic, archaeal Pd(0) bionanoparticles using Sulfolobus tokodaii. / Kitjanukit, Santisak; Sasaki, Keiko; Okibe, Naoko.
In: Extremophiles, Vol. 23, No. 5, 02.09.2019, p. 549-556.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Production of highly catalytic, archaeal Pd(0) bionanoparticles using Sulfolobus tokodaii
AU - Kitjanukit, Santisak
AU - Sasaki, Keiko
AU - Okibe, Naoko
PY - 2019/9/2
Y1 - 2019/9/2
N2 - The thermo-acidophilic archaeon, Sulfolobus tokodaii, was utilized for the production of Pd(0) bionanoparticles from acidic Pd(II) solution. Use of active cells was essential to form well-dispersed Pd(0) nanoparticles located on the cell surface. The particle size could be manipulated by modifying the concentration of formate (as electron donor; e-donor) and by addition of enzymatic inhibitor (Cu2+) in the range of 14–63 nm mean size. Since robust Pd(II) reduction progressed in pre-grown S. tokodaii cells even in the presence of up to 500 mM Cl−, it was possible to conversely utilize the effect of Cl− to produce even finer and denser particles in the range of 8.7–15 nm mean size. This effect likely resulted from the increasing stability of anionic Pd(II)–chloride complex at elevated Cl− concentrations, eventually allowing involvement of greater number of initial Pd(0) crystal nucleation sites (enzymatic sites). The catalytic activity [evaluated based on Cr(VI) reduction reaction] of Pd(0) bionanoparticles of varying particle size formed under different conditions were compared. The finest Pd(0) bionanoparticles obtained at 50 mM Cl− (mean 8.7 nm; median 5.6 nm) exhibited the greatest specific Cr(VI) reduction rate, with four times higher catalytic activity compared to commercial Pd/C. The potential applicability of S. tokodaii cells in the recovery of highly catalytic Pd(0) nanoparticles from actual acidic chloride leachate was, thus, suggested.
AB - The thermo-acidophilic archaeon, Sulfolobus tokodaii, was utilized for the production of Pd(0) bionanoparticles from acidic Pd(II) solution. Use of active cells was essential to form well-dispersed Pd(0) nanoparticles located on the cell surface. The particle size could be manipulated by modifying the concentration of formate (as electron donor; e-donor) and by addition of enzymatic inhibitor (Cu2+) in the range of 14–63 nm mean size. Since robust Pd(II) reduction progressed in pre-grown S. tokodaii cells even in the presence of up to 500 mM Cl−, it was possible to conversely utilize the effect of Cl− to produce even finer and denser particles in the range of 8.7–15 nm mean size. This effect likely resulted from the increasing stability of anionic Pd(II)–chloride complex at elevated Cl− concentrations, eventually allowing involvement of greater number of initial Pd(0) crystal nucleation sites (enzymatic sites). The catalytic activity [evaluated based on Cr(VI) reduction reaction] of Pd(0) bionanoparticles of varying particle size formed under different conditions were compared. The finest Pd(0) bionanoparticles obtained at 50 mM Cl− (mean 8.7 nm; median 5.6 nm) exhibited the greatest specific Cr(VI) reduction rate, with four times higher catalytic activity compared to commercial Pd/C. The potential applicability of S. tokodaii cells in the recovery of highly catalytic Pd(0) nanoparticles from actual acidic chloride leachate was, thus, suggested.
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U2 - 10.1007/s00792-019-01106-7
DO - 10.1007/s00792-019-01106-7
M3 - Article
VL - 23
SP - 549
EP - 556
JO - Extremophiles
JF - Extremophiles
SN - 1431-0651
IS - 5
ER -