scholarly journals Nonaqueous Sol–Gel Routes to Metal Oxide Nanoparticles

2007 ◽  
Vol 40 (9) ◽  
pp. 793-800 ◽  
Author(s):  
Markus Niederberger
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Oxide Nanoparticles

scholarly journals Effect of Nanoparticles on Wettability of Nanocoating on Carbon Steel

2016 ◽  
Vol 1 (2) ◽  
pp. 71-74
Author(s):  
Norhasnidawani Johari ◽  
Noor Azlina Hassan ◽  
Norita Hassan ◽  
Mohd Hanafi Ani
Keyword(s):  
Contact Angle ◽  
Carbon Steel ◽  
Metal Oxide ◽  
Water Drop ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Hydrophobic Surface ◽  
Oxide Nanoparticles ◽  
Water Medium ◽  
Wetting Ability

Nanocoatings plays an important role in coating industry. The solution was being prepared through copolymerization of epoxy resin hardener and with the incorporation of metal oxide nanoparticles, Zinc Oxide (ZnO) and Silica (SiO2). ZnO and SiO2 were synthesized using sol-gel. Epoxy hardener acted as host while the metal oxide nanoparticles as guest components. The formulation of nanocoatings with excellent adhesion strength and corrosion protection of carbon steel was studied. The performance of wetting ability with different medium was analysed using contact angle. Water medium showed the addition of 3wt% of hybrid between ZnO and SiO2 was the best nanocoating to form hydrophobic surface and was also the best nanocoating surface to form hydrophilic surface with vacuum oil dropping. In oil dropping, the contact angle was smaller than 90° and the water drop tends to spreads on surface.

Metal Oxide Nanocrystals: Building Blocks for Mesostructures and Precursors for Metal Nitrides

2007 ◽  
Vol 1007 ◽  
Author(s):  
Markus Niederberger ◽  
Jelena Buha ◽  
Igor Djerdj
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Building Blocks ◽  
Formation Mechanisms ◽  
Oxide Nanoparticles ◽  
Metal Nitride ◽  
Ordered Mesoporous Materials ◽  
Crystallite Sizes ◽  
The One

ABSTRACTSol-gel routes to metal oxide nanoparticles in organic solvents under exclusion of water represent a valuable alternative to aqueous methods. In comparison to the complex aqueous chemistry, nonaqueous processes offer the possibility to better understand and to control the reaction pathways on a molecular level, enabling the synthesis of nanomaterials with high crystallinity and well-defined and uniform particle morphologies. The manifold role of the organic species in providing the oxygen for the oxide formation and in controlling the crystal growth and the assembly properties makes it possible to tailor the morphological, structural and compositional characteristics of the final inorganic products.In addition to metal oxides with nearly spherical crystallite sizes in the range of just a few nanometers, also more complex morphologies such as nanowire bundles, nanorods or lamellar organic-inorganic hybrids of varying hierarchical complexity can be achieved in one step and without the use of any surfactants. The spherical nanocrystallites are on the one hand versatile building blocks for the fabrication of fully crystalline and ordered mesoporous materials and on the other hand suitable precursors for the synthesis of metal nitride nanoparticles.This proceeding provides an overview of the various oxidic nanoparticles synthesized via the nonaqueous and surfactant-free sol-gel approach, summarizes the most frequently found formation mechanisms, and offers some insight into the crystallization pathway of nanoparticles. Furthermore, the use of metal oxide nanoparticles as nanobuilding blocks for the preparation of nano- and mesostructures as well as their transformation into metal nitride nanocrystals will be discussed.

Preparation of Particulate Core-Shell Metal Oxide-Polymer Nanocomposites by a Sol-Gel Approach

2004 ◽  
Vol 847 ◽  
Author(s):  
Guido Kickelbick ◽  
Dieter Holzinger
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Coupling Agents ◽  
Second Step ◽  
Oxide Nanoparticles ◽  
Metal Alkoxides ◽  
Silane Coupling Agents ◽  
Grafting From

ABSTRACTTwo general microemulsion-based routes towards surface-functionalized metal oxide nanoparticles serving as macroinitiators in “grafting from” atom transfer radical polymerization (ATRP), are presented. Metal alkoxides modified with several β-diketone derivatives carrying potential ATRP-initiating sites served as precursors for the particle formation leading in an solgel process to in situ-functionalized titanium-, zirconium-, tantalum-, vanadium-, yttrium-, and iron oxide nanoparticles. The obtained systems were compared with metal oxide nanoparticles prepared by using metal salts as precursors which were functionalized in a second step with ATRP-initiator containing silane coupling agents. The obtained particles had diameters between 5 nm and 640 nm and served as multifunctional polymerization initiators in ATRP using styrene and methyl methacrylate as monomers.

Characterization of Metal-Oxide Nanoparticles: Synthesis and Dispersion in Polymeric Coatings

2002 ◽  
Vol 740 ◽  
Author(s):  
Li-Piin Sung ◽  
Stephanie Scierka ◽  
Mana Baghai-Anaraki ◽  
Derek L. Ho
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Polymeric Materials ◽  
Oxide Nanoparticles ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Yield Information ◽  
Sol Gel Synthesis

ABSTRACTMetal-oxide nanoparticles can be used to optimize UV absorption and to enhance the stiffness, toughness, and probably the service life of polymeric materials. Characterization of the nano- and microstructure dispersion of particles is necessary to optimize the structure-property relationships. Characterizations of both TiO2 particles dispersed in an acrylic-urethane matrix and TiO2 nanostructured films obtained through sol-gel synthesis are discussed. Experimental methods include microscopy (confocal, AFM) and small angle neutron scattering (SANS). Results from SANS experiments, which yield information about the cluster size of the nano-TiO2 particles and the spatial dispersion in various nanoparticle/polymer samples are presented and compared to the results of microscopy studies.

Synthesis of NiO Based Bimetallic Mixed Metal Oxide Nanoparticles by Sol-Gel Method

2012 ◽  
Vol 585 ◽  
pp. 164-168 ◽  
Author(s):  
Nisha Bayal ◽  
P. Jeevanandam
Keyword(s):  
Electron Microscopy ◽  
Metal Oxide ◽  
Band Gap ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Mixed Metal Oxide ◽  
Oxide Nanoparticles ◽  
Gel Method ◽  
Mixed Metal ◽  
Sol Gel Method

Nickel oxide based bimetallic mixed metal oxide nanoparticles are of considerable interest and they have been used as catalysts for NOx decomposition and as reactive adsorbents for ultra deep desulfurization. In the present study, nanoparticles of NiO-ZnO, NiO-CuO and NiO-MgO were synthesized by sol-gel method. The mixed metal oxide nanoparticles were characterized by X-ray diffraction, diffuse reflectance spectroscopy, field emission scanning electron microscopy and transmission electron microscopy. Pure NiO nanoparticles show a band gap of 4.24 eV and the band gap shows a blue shift or red shift in the case of mixed metal oxide nanoparticles.

scholarly journals REVIEW OF THE SYNTHESIS, CHARACTERIZATION AND APPLICATION OF ZIRCONIA MIXED METAL OXIDE NANOPARTICLES

2018 ◽  
Vol 6 (8) ◽  
pp. 136-145
Author(s):  
Ayodeji Precious Ayanwale ◽  
Alejandro Donohué Cornejo ◽  
Juan Carlos Cuevas González ◽  
León Francisco Espinosa Cristóbal ◽  
Simón Yobanny Reyes López
Keyword(s):  
Metal Oxide ◽  
Physicochemical Properties ◽  
Metal Oxide Nanoparticles ◽  
Sol Gel ◽  
Synthetic Methods ◽  
Mixed Metal Oxide ◽  
Oxide Nanoparticles ◽  
Mixed Metal ◽  
Metal Oxide Nanoparticle ◽  
Oxide Nanoparticle

There has been different synthetic route used for the synthesis of zirconia mixed metal oxide nanoparticles. The different synthetic methods coupled with other factors like concentration, PH, type of precursor used etc help to synthesize zirconia mixed metal oxide nanoparticles having different physicochemical properties. This paper discusses the different synthetic routes of sol-gel, hydrothermal and coprecipitation method for the formation of zirconia in combination with other metal oxide to form zirconia mixed metal oxide nanoparticles, the physicochemical properties of the synthesized zirconia mixed metal oxide nanoparticle, their characterization and application.

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