Effect of Phenolic Compounds on the Synthesis of Gold Nanoparticles and Its Catalytic Activity in the Reduction of Nitro Compounds

被引：79

作者：

Alegria, Elisabete C. B. A. ^{[1
,2
]}

Ribeiro, Ana P. C. ^{[1
]}

Mendes, Marta ^{[1
,2
]}

Ferraria, Ana M. ^{[3
,4
,5
]}

Botelho do Rego, Ana M. ^{[3
,4
,5
]}

Pombeiro, Armando J. L. ^{[1
]}

机构：

[1] Univ Lisbon, Inst Super Tecn, Ctr Quim Estrutural, Ave Rovisco Pais, P-1049001 Lisbon, Portugal

[2] Inst Politecn Lisboa, Dept Chem Engn, ISEL, P-1959007 Lisbon, Portugal

[3] Univ Lisbon, Inst Super Tecn, CQFM, P-1049001 Lisbon, Portugal

[4] Univ Lisbon, Inst Super Tecn, IN Inst Nanosci & Nanotechnol, P-1049001 Lisbon, Portugal

[5] Univ Lisbon, Inst Super Tecn, IBB, P-1049001 Lisbon, Portugal

来源：

NANOMATERIALS | 2018年 / 8卷 / 05期

关键词：

gold nanoparticles; phytochemicals; catalysis; reduction; nitro compounds; GREEN SYNTHESIS; P-NITROPHENOL; METALLIC NANOPARTICLES; AU NANOPARTICLES; SILVER; SIZE; 4-NITROPHENOL; OXIDATION; BIOSYNTHESIS; NANOCOMPOSITES;

D O I：

10.3390/nano8050320

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Gold nanoparticles (AuNPs) were prepared using an eco-friendly approach in a single step by reduction of HAuCl4 with polyphenols from tea extracts, which act as both reducing and capping agents. The obtained AuNPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-vis), and X-ray photoelectron spectroscopy (XPS). They act as highly efficient catalysts in the reduction of various aromatic nitro compounds in aqueous solution. The effects of a variety of factors (e.g., reaction time, type and amount of reducing agent, shape, size, or amount of AuNPs) were studied towards the optimization of the processes. The total polyphenol content (TPC) was determined before and after the catalytic reaction and the results are discussed in terms of the tea extract percentage, the size of the AuNPs, and their catalytic activity. The reusability of the AuNP catalyst in the reduction of 4-nitrophenol was also tested. The reactions follow pseudo first-order kinetics.

引用

页数：18

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