Sunlight-Induced Synthesis of Various Gold Nanoparticles and Their Heterogeneous Catalytic Properties on a Paper-Based Substrate

2014 ◽  
Vol 6 (14) ◽  
pp. 11514-11522 ◽  
Author(s):  
Jun-Hyun Kim ◽  
Katrina M. Twaddle ◽  
Jiayun Hu ◽  
Hongsik Byun
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Properties ◽  
Heterogeneous Catalytic

Hydrogen peroxide decomposition on a two-component CuO-Cr2O3 catalyst

1988 ◽  
Vol 53 (8) ◽  
pp. 1636-1646 ◽  
Author(s):  
Viliam Múčka ◽  
Kamil Lang
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Extreme Values ◽  
Catalytic Properties ◽  
Active Components ◽  
Catalytic Systems ◽  
Heterogeneous Catalytic ◽  
Peroxide Decomposition ◽  
Two Component ◽  
Catalytically Active

Some physical and catalytic properties of the two-component copper(II)oxide-chromium(III)oxide catalyst with different content of both components were studied using the decomposition of the aqueous solution of hydrogen peroxide as a testing reaction. It has been found that along to both basic components, the system under study contains also the spinel structure CuCr2O4, chromate washable by water and hexavalent ions of chromium unwashable by water. The soluble chromate is catalytically active. During the first period of the reaction the equilibrium is being established in both homogeneous and heterogeneous catalytic systems. The catalytic activity as well as the specific surface area of the washed solid is a non-monotonous function of its composition. It seems highly probable that the extreme values of both these quantities are not connected with the detected admixtures in the catalytic system. The system under study is very insensitive with regard to the applied doses of gamma radiation. Its catalytic properties are changed rather significantly after the thermal treatment and particularly after the partial reduction to low degree by hydrogen. The observed changes of the catalytic activity of the system under study are very probably in connection with the changes of the valence state of the catalytically active components of the catalyst.

Catalytic properties of gold nanoparticles immobilized on the surfaces of nanocarriers

2009 ◽  
Vol 12 (5) ◽  
pp. 1877-1887 ◽  
Author(s):  
Xi Chen ◽  
Dongyun Zhao ◽  
Yingli An ◽  
Linqi Shi ◽  
Wenchao Hou ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Properties

scholarly journals On the Structural Origin of the Catalytic Properties of Inherently Strained Ultrasmall Decahedral Gold Nanoparticles

Nano Letters ◽  
2012 ◽  
Vol 12 (4) ◽  
pp. 2027-2031 ◽  
Author(s):  
Michael J. Walsh ◽  
Kenta Yoshida ◽  
Akihide Kuwabara ◽  
Mungo L. Pay ◽  
Pratibha L. Gai ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Properties

Effect of Composition on the Catalytic Properties of Mixed-Ligand-Coated Gold Nanoparticles

2011 ◽  
Vol 123 (34) ◽  
pp. 8046-8051 ◽  
Author(s):  
Anirban Ghosh ◽  
Soubir Basak ◽  
Benjamin H. Wunsch ◽  
Rajiv Kumar ◽  
Francesco Stellacci
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Properties ◽  
Mixed Ligand

scholarly journals Enhancement of the Peroxidase-Like Activity of Iodine-Capped Gold Nanoparticles for the Colorimetric Detection of Biothiols

Biosensors ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 113 ◽  
Author(s):  
Chia-Chen Chang ◽  
Tsz-Lian Hsu ◽  
Chie-Pein Chen ◽  
Chen-Yu Chen
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Detection Limit ◽  
Enzymatic Activity ◽  
Catalytic Properties ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Synergetic Effect ◽  
Vis Spectroscopy ◽  
Wide Range

A colorimetric assay was developed for the detection of biothiols, based on the peroxidase-like activity of iodine-capped gold nanoparticles (AuNPs). These AuNPs show a synergetic effect in the form of peroxidase-mimicking activity at the interface of AuNPs, while free AuNPs and iodine alone have weak catalytic properties. Thus, iodine-capped AuNPs possess good intrinsic enzymatic activity and trigger the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB), leading to a change in color from colorless to yellow. When added to solution, biothiols, such as cysteine, strongly bind to the interface of AuNPs via gold-thiol bonds, inhibiting the catalytic activity of AuNPs, resulting in a decrease in oxidized TMB. Using this strategy, cysteine could be linearly determined, at a wide range of concentrations (0.5 to 20 μM), with a detection limit of 0.5 μM using UV-Vis spectroscopy. This method was applied for the detection of cysteine in diluted human urine.

Catalytic properties of gold nanoparticles in H2—D2 exchange and ortho—para hydrogen conversion

2015 ◽  
Vol 463 (2) ◽  
pp. 165-167 ◽  
Author(s):  
O. A. Boeva ◽  
B. G. Ershov ◽  
K. N. Zhavoronkova ◽  
A. A. Odintsov ◽  
R. D. Solovov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Properties ◽  
Para Hydrogen
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