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Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol

The polyol synthesis is a well-established method to form so-called “surfactant-free” nanoparticles (NPs). In the present study, the NP size resulting from the thermal reduction of the precursors H(2)PtCl(6), H(2)Pt(OH)(6), or Pt(acac)(2) in presence of the bases NaOH or Na(acac) at different concen...

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Autores principales: Schröder, Johanna, Neumann, Sarah, Quinson, Jonathan, Arenz, Matthias, Kunz, Sebastian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8400561/
https://www.ncbi.nlm.nih.gov/pubmed/34443923
http://dx.doi.org/10.3390/nano11082092
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author Schröder, Johanna
Neumann, Sarah
Quinson, Jonathan
Arenz, Matthias
Kunz, Sebastian
author_facet Schröder, Johanna
Neumann, Sarah
Quinson, Jonathan
Arenz, Matthias
Kunz, Sebastian
author_sort Schröder, Johanna
collection PubMed
description The polyol synthesis is a well-established method to form so-called “surfactant-free” nanoparticles (NPs). In the present study, the NP size resulting from the thermal reduction of the precursors H(2)PtCl(6), H(2)Pt(OH)(6), or Pt(acac)(2) in presence of the bases NaOH or Na(acac) at different concentrations is studied. It is shown that the size control depends more strongly on the nature of the precursor (metal salt) than on the anion present in the base. The latter is surprising as the concentration of the base anion is often an important factor to achieve a size control. The reduction of H(2)PtCl(6) or H(2)Pt(OH)(6) in presence of NaOH and Na(acac) confirm the observation that the NP size is determined by the OH(−)/Pt molar ratio and expands it to the base anion/Pt molar ratio. In contrast, the reduction of Pt(acac)(2) in presence of the bases NaOH (previous reports) or Na(acac) (shown in the present work) leads to larger NPs of ca. 3 nm, independent of the concentration of the base anions. Hence, the anion effect observed here seems to originate predominantly from the nature of the precursor (precursor anion dependence) and only for certain precursors as H(2)PtCl(6) or H(2)Pt(OH)(6) the size control depends on the base anion/Pt molar ratio.
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spelling pubmed-84005612021-08-29 Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol Schröder, Johanna Neumann, Sarah Quinson, Jonathan Arenz, Matthias Kunz, Sebastian Nanomaterials (Basel) Communication The polyol synthesis is a well-established method to form so-called “surfactant-free” nanoparticles (NPs). In the present study, the NP size resulting from the thermal reduction of the precursors H(2)PtCl(6), H(2)Pt(OH)(6), or Pt(acac)(2) in presence of the bases NaOH or Na(acac) at different concentrations is studied. It is shown that the size control depends more strongly on the nature of the precursor (metal salt) than on the anion present in the base. The latter is surprising as the concentration of the base anion is often an important factor to achieve a size control. The reduction of H(2)PtCl(6) or H(2)Pt(OH)(6) in presence of NaOH and Na(acac) confirm the observation that the NP size is determined by the OH(−)/Pt molar ratio and expands it to the base anion/Pt molar ratio. In contrast, the reduction of Pt(acac)(2) in presence of the bases NaOH (previous reports) or Na(acac) (shown in the present work) leads to larger NPs of ca. 3 nm, independent of the concentration of the base anions. Hence, the anion effect observed here seems to originate predominantly from the nature of the precursor (precursor anion dependence) and only for certain precursors as H(2)PtCl(6) or H(2)Pt(OH)(6) the size control depends on the base anion/Pt molar ratio. MDPI 2021-08-18 /pmc/articles/PMC8400561/ /pubmed/34443923 http://dx.doi.org/10.3390/nano11082092 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Schröder, Johanna
Neumann, Sarah
Quinson, Jonathan
Arenz, Matthias
Kunz, Sebastian
Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol
title Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol
title_full Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol
title_fullStr Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol
title_full_unstemmed Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol
title_short Anion Dependent Particle Size Control of Platinum Nanoparticles Synthesized in Ethylene Glycol
title_sort anion dependent particle size control of platinum nanoparticles synthesized in ethylene glycol
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8400561/
https://www.ncbi.nlm.nih.gov/pubmed/34443923
http://dx.doi.org/10.3390/nano11082092
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