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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la3029462
|2 doi
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|a eng
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| 100 |
1 |
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|a Soultanidis, Nikolaos
|e verfasserin
|4 aut
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| 245 |
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|a Solvothermal synthesis of ultrasmall tungsten oxide nanoparticles
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 23.05.2013
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|a Date Revised 21.12.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The synthesis of catalytically useful, ultrasmall oxide nanoparticles (NPs) of group 5 and 6 metals is not readily achievable through reported methods. In this work, we introduce a one-pot, two-precursor synthesis route to <2 nm MO(x) NPs in which a polyoxometalate salt is decomposed thermally in a high-boiling organic solvent oleylamine. The use of ammonium metatungstate resulted in oleylamine-coated, crystalline WO(x) NPs at consistently high yields of 92 ± 5%. The semicrystalline NPs contained 20-36 WO(x) structural units per particle, as determined from aberration-corrected high-resolution scanning transmission electron microscopy, and an organic coating of 16-20 oleylamine molecules, as determined by thermogravimetric analysis. The NPs had a mean size of 1.6 ± 0.3 nm, as estimated from atomic force microscopy and small-angle X-ray scattering measurements. Carrying out the synthesis in the presence of organic oxidant trimethylamine N-oxide led to smaller WO(x) NPs (1.0 ± 0.4 nm), whereas the reductant 1,12-dodecanediol led to WO(x) nanorods (4 ± 1 nm × 20 ± 5 nm). These findings provide a new method to control the size and shape of transition metal oxide NPs, which will be especially useful in catalysis
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|a Journal Article
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1 |
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|a Zhou, Wu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Kiely, Christopher J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wong, Michael S
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 51 vom: 21. Dez., Seite 17771-7
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:28
|g year:2012
|g number:51
|g day:21
|g month:12
|g pages:17771-7
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|u http://dx.doi.org/10.1021/la3029462
|3 Volltext
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