scholarly journals Deposition of gold nanoparticles from colloid on TiO2 surface

2017 ◽  
Vol 68 (6) ◽  
pp. 487-491
Author(s):  
Vlastimil Rehacek ◽  
Ivan Hotovy
Keyword(s):  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Silicon Dioxide ◽  
Coupling Agent ◽  
Oxide Surface ◽  
Tio2 Surface ◽  
Metal Oxide Surface ◽  
Colloidal Gold Nanoparticles ◽  
Titanium Dioxide Surface ◽  
Silicon Silicon

AbstractIn this paper, experimental results are presented on the deposition of colloidal gold nanoparticles on the surfaces of TiO2prepared on silicon/silicon dioxide. Important procedures, such as titanium dioxide surface hydrophilization as well as functionalization by an organosilane coupling agent (3-aminopropyl) trimethoxysilane and (3-mercaptopropyl) trimethoxysilane were investigated in order to obtain a metal oxide surface with the most convenient properties for immobilization of gold nanoparticles having a dense and uniform distribution. TiO2nanotips prepared by reactive ion etching of oxide surface covered with self-mask gold nanoparticles are demonstrated.

scholarly journals Design of gold nanoparticles-decorated SiO2@TiO2 core/shell nanostructures for visible light-activated photocatalysis

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7469-7475 ◽  
Author(s):  
Ryeri Lee ◽  
Yogeenth Kumaresan ◽  
Sei Young Yoon ◽  
Soong Ho Um ◽  
Il Keun Kwon ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Visible Light ◽  
Silicon Dioxide ◽  
Au Nanoparticles ◽  
Core Shell ◽  
Photocatalytic Reaction ◽  
Shell Nanostructures ◽  
Visible Light Driven

In this study, we designed core/shell nanostructures (CSNs) of silicon dioxide (SiO2)/titanium dioxide (TiO2), which were decorated with gold (Au) nanoparticles (NPs), to activate the visible light-driven photocatalytic reaction.

scholarly journals Cesium Salt of Sodium 30-Tungstopentaphosphate: An Effective and Green Polyoxometalate for Synthesis of Gold Nanoparticles along with Decoration of Titanium Dioxide with Gold Nanoparticles for Bleaching of Malachite Green

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Fatemeh Farrash Bamoharram ◽  
Afsaneh Moghadam Jafari ◽  
Ali Ayati ◽  
Bahareh Tanhaei ◽  
Mika Sillanpää
Keyword(s):  
Particle Size ◽  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Malachite Green ◽  
Pure Acid ◽  
Cesium Salt ◽  
Amine Functionalized ◽  
Titanium Dioxide Surface ◽  
First Time ◽  
Better Than

For the first time, capability of the cesium salt of sodium 30-tungstopentaphosphate, the so-called Preyssler’s anion (CsP5), as a green and eco-friendly polyoxometalate was investigated in the synthesis of gold nanoparticles and decoration of titanium dioxide with gold nanoparticles. Gold nanoparticles and nanocomposites were characterized by TEM, XRD, UV, and FTIR. TEM images showed that the gold nanoparticles have tubular and spherical shapes and particle size ranges from 10 to 25 nm. For gold-decorated titanium dioxide/Preyssler, a comparison between pure and amine-modified titanium dioxide showed higher loading of gold nanoparticles on amine-functionalized titanium dioxide. The performance of CsP5was compared with its pure acid (HP5). Our findings showed that CsP5, as a catalytic linker to bind onto titanium dioxide surface for reducing gold nanoparticles, renders decoration better than HP5in both pure and modified titanium dioxide. In addition, efficiency of the photocatalytic bleaching of malachite green by the synthesized nanocomposites was found to be excellent.

scholarly journals Molecular titanium–hydroxamate complexes as models for TiO2 surface binding

2016 ◽  
Vol 52 (14) ◽  
pp. 2972-2975 ◽  
Author(s):  
Bradley J. Brennan ◽  
Jeffrey Chen ◽  
Benjamin Rudshteyn ◽  
Subhajyoti Chaudhuri ◽  
Brandon Q. Mercado ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Oxide Surface ◽  
Binding Motif ◽  
Tio2 Surface ◽  
Surface Binding ◽  
Metal Oxide Surface

Molecular titanium(iv) hydroxamate complexes were synthesized and used as models to determine the hydroxamate–metal oxide surface binding motif on TiO2.

Dense aqueous colloidal gold nanoparticles prepared from highly concentrated precursor solution

2011 ◽  
Vol 362 (2) ◽  
pp. 325-329 ◽  
Author(s):  
Tetsuro Soejima ◽  
Seisaku Oshiro ◽  
Yasuji Nakatsuji ◽  
Seishiro Ito
Keyword(s):  
Gold Nanoparticles ◽  
Colloidal Gold ◽  
Precursor Solution ◽  
Colloidal Gold Nanoparticles
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