Enhanced catalytic reduction of 4-nitrophenol over titania nanotube supported gold nanoparticles by weak ultraviolet light irradiation: Role of gold surface charge

2018 ◽  
Vol 445 ◽  
pp. 535-541 ◽  
Author(s):  
Xin Ning ◽  
Fangxue Wei ◽  
Heyun Fu ◽  
Xiaolei Qu ◽  
Zhaoyi Xu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Surface Charge ◽  
Ultraviolet Light ◽  
Catalytic Reduction ◽  
Gold Surface ◽  
Light Irradiation ◽  
Ultraviolet Light Irradiation ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

Role of Hydroxyl Groups in Low-Temperature CO Catalytic Oxidation over Zn4Si2O7(OH)2 Nanowire-Supported Gold Nanoparticles

2018 ◽  
Vol 122 (44) ◽  
pp. 25456-25466 ◽  
Author(s):  
Jing-Jing Li ◽  
Bao-Lin Zhu ◽  
Gui-Chang Wang ◽  
Zun-Feng Liu ◽  
Wei-Ping Huang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Low Temperature ◽  
Catalytic Oxidation ◽  
Hydroxyl Groups ◽  
Co Catalytic Oxidation ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

scholarly journals Carbon Supported Gold Nanoparticles for the Catalytic Reduction of 4-Nitrophenol

2019 ◽  
Vol 7 ◽  
Author(s):  
Hugo Rodríguez Molina ◽  
José Luis Santos Muñoz ◽  
María Isabel Domínguez Leal ◽  
Tomas Ramírez Reina ◽  
Svetlana Ivanova ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Reduction ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

scholarly journals New Insights on the Dynamic Role of the Protecting Agent on the Reactivity of Supported Gold Nanoparticles

ChemCatChem ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1653-1663
Author(s):  
Giorgio Grillo ◽  
Federica Menegazzo ◽  
Silvia Tabasso ◽  
Michela Signoretto ◽  
Maela Manzoli ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

scholarly journals Surface Probing by Spectroscopy on Titania-Supported Gold Nanoparticles for a Photoreductive Application

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 623 ◽  
Author(s):  
Matteo Compagnoni ◽  
Alberto Villa ◽  
Elnaz Bahdori ◽  
David Morgan ◽  
Laura Prati ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gold Surface ◽  
Precipitation Method ◽  
Continuous Increase ◽  
Carbonate Formation ◽  
Activation Mechanisms ◽  
Spent Catalysts ◽  
Adsorption Of Co2 ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

The continuous increase in scientific reports concerning photocatalysis and in particular CO2 photoreduction in recent years reveals the high degree of interest around the topic. However, the adsorption and activation mechanisms of CO2 on TiO2, the most used photocatalyst, are poorly understood and investigated. Gold nanoparticles were prepared by a modified deposition-precipitation method using urea and a chemical reductant. Bare P25 was used as reference. Combined spectroscopic investigations of fresh and spent samples with photoactivity studies reported in this article provide new insights to the role of CO2 adsorption and carbonate formation on Au/TiO2 during CO2 photocatalytic reduction. The key intermediates’ and products’ adsorption (CO, methanol, ethanol) was studied, coupled with X-ray photoelectron microscopy (XPS) and UV-Visible spectroscopy. The adsorption of CO2 on fresh and spent catalysts changes radically considering the carbonate formation and the gold surface presence. Methanol and ethanol revealed new adsorbed species on Au with respect to bare titania. The characterisation of the spent catalysts revealed the good stability of these samples.

Dendritic fibrous nano-silica supported gold nanoparticles as an artificial enzyme

2018 ◽  
Vol 6 (11) ◽  
pp. 1600-1604 ◽  
Author(s):  
Rustam Singh ◽  
Rajesh Belgamwar ◽  
Mahak Dhiman ◽  
Vivek Polshettiwar
Keyword(s):  
Gold Nanoparticles ◽  
Enzymatic Activity ◽  
Oxidation Product ◽  
Artificial Enzyme ◽  
Nano Silica ◽  
Unique Role ◽  
Fibrous Morphology ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

We report a dendritic fibrous nano-silica supported gold nanoparticles (DFNS/Au) as peroxidase like artificial enzyme. This study indicates the unique role of fibrous morphology of DFNS for enhancement in enzymatic activity. A solvent dependent selectivity towards a two-electron oxidation product, TMB-diamine, has also been observed.

Reduction of Nitroaromatic Compounds on Supported Gold Nanoparticles by Visible and Ultraviolet Light

2010 ◽  
Vol 122 (50) ◽  
pp. 9851-9855 ◽  
Author(s):  
Huaiyong Zhu ◽  
Xuebin Ke ◽  
Xuzhuang Yang ◽  
Sarina Sarina ◽  
Hongwei Liu
Keyword(s):  
Gold Nanoparticles ◽  
Ultraviolet Light ◽  
Nitroaromatic Compounds ◽  
Supported Gold Nanoparticles ◽  
Supported Gold
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