Size dependent catalysis with CTAB-stabilized gold nanoparticles

被引：283

作者：

Fenger, R. ^{[1
]}

Fertitta, E. ^{[1
]}

Kirmse, H. ^{[2
]}

Thuenemann, A. F. ^{[3
]}

Rademann, K. ^{[1
,3
]}

机构：

[1] Humboldt Univ, Inst Chem, D-12489 Berlin, Germany

[2] Humboldt Univ, Inst Phys, AG TEM, D-12489 Berlin, Germany

[3] BAM Fed Inst Mat Res & Testing, D-12205 Berlin, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2012年 / 14卷 / 26期

关键词：

TRANSITION; REDUCTION; GROWTH; NUCLEATION; DEPOSITION; CHEMISTRY; OXIDATION; FILMS;

D O I：

10.1039/c2cp40792b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

CTAB-stabilized gold nanoparticles were synthesized by applying the seeding-growth approach in order to gain information about the size dependence of the catalytic reduction of p-nitrophenol to p-aminophenol with sodium borohydride. Five different colloidal solutions of stabilized gold nanoparticles have been characterized by TEM, AFM, UV-Vis, SAXS, and DLS for their particle size distributions. Gold nanoparticles (mean sizes: 3.5, 10, 13, 28, 56 nm diameter) were tested for their catalytic efficiency. Kinetic data were acquired by UV-Vis spectroscopy at different temperatures between 25 and 45 degrees C. By studying the p-nitrophenol to p-aminophenol reaction kinetics we determined the nanoparticle size which is needed to gain the fastest conversion under ambient conditions in the liquid phase. Unexpectedly, CTAB-stabilized gold nanoparticles with a diameter of 13 nm are most efficient.

引用

页码：9343 / 9349

页数：7

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