scholarly journals One-step synthesis of zero-dimensional hollow nanoporous gold nanoparticles with enhanced methanol electrooxidation performance

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Srikanth Pedireddy ◽  
Hiang Kwee Lee ◽  
Weng Weei Tjiu ◽  
In Yee Phang ◽  
Hui Ru Tan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Methanol Electrooxidation ◽  
Nanoporous Gold ◽  
One Step

scholarly journals TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H2O2

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Dongxiao Wen ◽  
Qianrui Liu ◽  
Ying Cui ◽  
Huaixia Yang ◽  
Jinming Kong
Keyword(s):  
Electrochemical Detection ◽  
Nanoporous Gold ◽  
Carboxyl Groups ◽  
Time Interval ◽  
Optimal Conditions ◽  
Sem Images ◽  
One Step ◽  
Ph Range ◽  
Synthesis Approach ◽  
Higher Sensitivity

A novel nanocomposite of nanoporous gold nanoparticles (np-AuNPs) functionalized with 2,2,6,6-tetramethyl-1-piperidinyloxy radical (TEMPO) was prepared; assembled carboxyl groups on gold nanoporous nanoparticles surface were combined with TEMPO by the “bridge” of carboxylate-zirconium-carboxylate chemistry. SEM images and UV-Vis spectroscopies of np-AuNPs indicated that a safe, sustainable, and simplified one-step dealloying synthesis approach is successful. The TEMPO-np-AuNPs exhibited a good performance for the electrochemical detection of H2O2 due to its higher number of electrochemical activity sites and surface area of 7.49 m2g-1 for load bigger amount of TEMPO radicals. The TEMPO-functionalized np-AuNPs have a broad pH range and shorter response time for H2O2 catalysis verified by the response of amperometric signal under different pH and time interval. A wide linear range with a detection limit of 7.8 × 10-7 M and a higher sensitivity of 110.403 μA mM-1cm-2 were obtained for detecting H2O2 at optimal conditions.

Rapid one-step synthesis, characterization and functionalization of silica coated gold nanoparticles

2011 ◽  
Vol 392 (1) ◽  
pp. 137-144 ◽  
Author(s):  
Newaz Mohammed Bahadur ◽  
Shun Watanabe ◽  
Takeshi Furusawa ◽  
Masahide Sato ◽  
Fumio Kurayama ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
One Step

Study of Antioxidant Property of the Rhizome Extract of Polygonatum cirrhifolium (Mahameda) and its use in the green synthesis of Gold nanoparticles

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Braja Gopal Bag ◽  
Shib Shankar Dash ◽  
Anup Mandal
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Room Temperature ◽  
Chemical Constituents ◽  
Antioxidant Property ◽  
Dpph Radical ◽  
Mild Conditions ◽  
One Step ◽  
The One

The antioxidant efficacy of the rhizome extract of Polygonatum cirrhifolium (Mahameda) has been studied against a stable 2, 2-diphenylpicrylhydrazyl (DPPH) radical at room temperature. The chemical constituents present in the rhizome extract have been utilized for the one step synthesis of stable gold nanoparticles at room temperature under very mild conditions.

Stability of carbon monoxide oxidation process on gold nanoparticles

2020 ◽  
Vol 8 (1) ◽  
pp. 116-124
Author(s):  
P. P. Kostrobij ◽  
◽  
I. A. Ryzha ◽  
Keyword(s):  
Carbon Monoxide ◽  
Gold Nanoparticles ◽  
Reaction Mechanisms ◽  
Structural Changes ◽  
Oxidation Process ◽  
Lyapunov Method ◽  
Catalyst Surface ◽  
Carbon Monoxide Oxidation ◽  
One Step ◽  
The Stability

The stability conditions for mathematical models of carbon monoxide oxidation on the surface of gold nanoparticles are investigated. The cases of reaction mechanisms of one-step and step-by-step transformation of reagents are consecutively considered. Using the stability analysis by Lyapunov method, it is shown that models which take into account the possibility of structural changes of the catalyst surface can predict the occurrence of oscillatory mode in the system as a result of Hopf instability.

One step hydrothermal functionalization of gold nanoparticles with folic acid

2019 ◽  
Vol 181 ◽  
pp. 533-538 ◽  
Author(s):  
Anna M. Vostrikova ◽  
Alina A. Kokorina ◽  
Anastassia N. Mitrophanova ◽  
Olga A. Sindeeva ◽  
Andrei V. Sapelkin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Folic Acid ◽  
One Step
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