The formation and catalytic activity of silver nanoparticles in aqueous polyacrylate solutions

被引：0
作者：
Jie Wang
Jianjia Liu
Xuhong Guo
Liang Yan
Stephen F. Lincoln
机构：
[1] East China University of Science and Technology,State Key Laboratory of Chemical Engineering
[2] University of Adelaide,Department of Chemistry
来源：
Frontiers of Chemical Science and Engineering | 2016年 / 10卷
关键词：
silver nanoparticles; polyacrylates; catalysis; mechanism; sodium borohydride;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Silver nanoparticles (AgNPs) have been synthesized in the presence of polyacrylate through the reduction of silver nitrate by sodium borohydride in aqueous solution. The AgNO3 and polyacrylate carboxylate group concentrations were kept constant at 2.0 × 10–4 and 1.0 × 10–2 mol·L–1, respectively, while the ratio of [NaBH4]/[AgNO3] was varied from 1 to 100. The ultraviolet-visible plasmon resonance spectra of these solutions were found to vary with time prior to stabilizing after 27 d, consistent with changes of AgNP size and distribution within the polyacrylate ensemble occurring. These observations, together with transmission electron microscopic results, show this rearrangement to be greatest among the samples at the lower ratios of [NaBH4]/[AgNO3] used in the preparation, whereas those at the higher ratios showed a more even distribution of smaller AgNP. All ten of the AgNP samples, upon a one thousand-fold dilution, catalyze the reduction of 4-nitrophenol to 4-aminophenol in the temperature range 283.2–303.2 K with a substantial induction time being observed at the lower temperatures.
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页码：432 / 439
页数：7
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共 176 条
  • [1] Mock J J(2002)Shape effects in plasmon resonance of individual colloidal silver nanoparticles Journal of Chemical Physics 116 6755-6759
  • [2] Barbic M(2006)Maneuvering the surface plasmon resonance of silver nanostructures through shape-controlled synthesis Journal of Physical Chemistry B 110 15666-15675
  • [3] Smith D R(2007)Nano-optics from sensing to waveguiding Nature Photonics 1 641-648
  • [4] Schultz D A(2009)Shape-controlled synthesis of metal nanocrystals: Simple chemistry meets complex physics Angewandte Chemie International Edition 48 60-103
  • [5] Schultz S(2009)Silver nanoparticles with planar twinned defects: Effect of halides for precise tuning of plasmon resonance maxima from 400 to>900 nm Chemical Communications 46 7170-7172
  • [6] Wiley B J(2011)Plasmons in strongly coupled metallic nanostructures Chemical Reviews 111 3913-3961
  • [7] Im S H(2012)Radiative and nonradiative properties of single plasmonic nanoparticles and their assemblies Accounts of Chemical Research 45 1936-1945
  • [8] Li Z M(2005)Chemistry and properties of nanocrystals of different shapes Chemical Reviews 105 1025-1102
  • [9] Lellan J(2015)Silver-catalyzed enantioselective propargylation reactions of N-sulfonylketimines Organic Letters 17 5340-5343
  • [10] Siekkinen A(2005)High catalytic activity of platinum nanoparticles immobilized on spherical polyelectrolyte brushes Langmuir 21 12229-12234
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