scholarly journals Synthesis and Characterization of Niobium Oxide Nanoparticles, Polyindole and Nb2O5/Polyindole Nanocomposite

2020 ◽  
Vol 32 (3) ◽  
pp. 653-658
Author(s):  
S. Anandhi ◽  
D. Keerthika ◽  
M. Leo Edward ◽  
V. Jaisankar
Keyword(s):  
Niobium Oxide ◽  
Sol Gel ◽  
Degree Of Crystallinity ◽  
Oxide Nanoparticles ◽  
Spectroscopic Techniques ◽  
Crystallite Sizes ◽  
Chemical Character ◽  
Tga And Dsc ◽  
Polymerization Method

In present work, polyindole-Nb2O5 nanocomposite was synthesized and characterized by various analytical methods. Niobium oxide nanoparticles were prepared by sol gel method. Polyindole and Nb2O5 nanocomposites was prepared by chemical polymerization method and the morphology of Nb2O5 nanoparticles, polyindole and the nanocomposite was studied by SEM. The chemical structure of Nb2O5 nanoparticle, polyindole and the nanocomposite was characterized by UV-visible, FTIR and NMR spectroscopic techniques. Elemental composition and chemical character was analyzed by the use of EDAX technique. The X-ray powder diffraction technique was used to determine the degree of crystallinity and crystallite sizes. Thermal analysis such as TGA and DSC showed that the conducting polymers in the nanocomposites were stable even at high temperatures.

scholarly journals Sol-Gel Synthesis and Characterization of Cubic Bismuth Zinc Niobium Oxide Nanopowders

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Ganchimeg Perenlei ◽  
Peter C. Talbot ◽  
Wayde N. Martens
Keyword(s):  
Niobium Oxide ◽  
Sol Gel ◽  
Atomic Ratio ◽  
X Ray Diffraction ◽  
Metal Acetate ◽  
Chemical Homogeneity ◽  
Liquid Suspension ◽  
Crystallite Sizes ◽  
Sol Gel Synthesis

Bismuth zinc niobium oxide (BZN) was successfully synthesized by a diol-based sol-gel reaction utilizing metal acetate and alkoxide precursors. Thermal analysis of a liquid suspension of precursors suggests that the majority of organic precursors decompose at temperatures up to 150°C, and organic free powders form above 350°C. The experimental results indicate that a homogeneous gel is obtained at about 200°C and then converts to a mixture of intermediate oxides at 350–400°C. Finally, single-phased BZN powders are obtained between 500 and 900°C. The degree of chemical homogeneity as determined by X-ray diffraction and EDS mapping is consistent throughout the samples. Elemental analysis indicates that the atomic ratio of metals closely matches a Bi1.5ZnNb1.5O7composition. Crystallite sizes of the BZN powders calculated from the Scherrer equation are about 33–98 nm for the samples prepared at 500–700°C, respectively. The particle and crystallite sizes increase with increased sintering temperature. The estimated band gap of the BZN nanopowders from optical analysis is about 2.60–2.75 eV at 500-600°C. The observed phase formations and measured results in this study were compared with those of previous reports.

Synthesis and characterization of nickel oxide nanoparticles by sol-gel technique

2020 ◽  
Author(s):  
Infantiya Stephen Grace ◽  
J. Vinola ◽  
Shubramaniyan Deepapriya ◽  
David Rodney John ◽  
A. Aslinjensipriya ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Gel Technique

Crystalline quality assessment, photocurrent response and optical properties of reduced graphene oxide uniformly decorated zinc oxide nanoparticles based on the graphene oxide concentration

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 53117-53128 ◽  
Author(s):  
Majid Azarang ◽  
Ahmad Shuhaimi ◽  
M. Sookhakian
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Degree Of Crystallinity ◽  
Oxide Nanoparticles ◽  
One Pot ◽  
Natural Surfactant ◽  
Reduced Graphene

Zinc oxide nanoparticles–reduced graphene oxide composites with a high degree of crystallinity and high dispersity were successfully synthesized via a facile sol–gel one-pot method in a starch environment as a natural surfactant for the fabrication of solar cell devices.

Synthesis and Characterization of ZrO2 Membranes for Nanofiltration via Sol–Gel Combined with In-Suit Polymerization Method

2019 ◽  
Vol 11 (2) ◽  
pp. 182-192 ◽  
Author(s):  
Yangyang Han ◽  
Jianguo Huang ◽  
Weidong Li ◽  
Xinying Qiao ◽  
Mintao Gou ◽  
...  
Keyword(s):  
Sol Gel ◽  
Synthesis And Characterization ◽  
In Suit ◽  
Polymerization Method

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.

Synthesis and characterization of magnesium Oxide nanoparticles by sol-gel method

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Jegadeeswari A ◽  
Nivetha S
Keyword(s):  
Magnesium Oxide ◽  
Sol Gel ◽  
Morphological Characterization ◽  
Magnesium Nitrate ◽  
Oxide Nanoparticles ◽  
Mgo Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Magnesium Oxide Nanoparticles

Magnesium oxide was hygroscopic solid mineral that occurs naturally as periclase.Magnesium oxide had high thermal conductivity; it gets heated when the electricity was passed through it. Magnesia crucible had a stability of 2400°C in air, 1700°C in reducing atmosphere. Magnesium oxide nanoparticles were obtained from the mixture of magnesium nitrate as precursor and sodium hydroxide as precipitating agent by sol-gel method. Finally,the resultant white crystalline powder of MgO was annealed at various temperatures of 80°C, 135°C and 180°C. The analytical studies (XRD, SEM FTIR, EDAX) reveals the morphological characterization of MgO nanoparticles. The Scanning Electron Microscopy (SEM) indicates the structures of MgO nanoparticles. The crystal size of MgO nanoparticles was obtained by X-Ray Diffraction (XRD). The optical properties of the sample were obtained by UV- Visible spectroscopy. Fourier Transform infrared spectroscopy indicates powdered composition of the sample. EDAX indicates elementary composition of the MgO nanoparticles.

scholarly journals Preparation and characterization of copper oxide nanoparticles and determination of enhancement in critical heat flux

2017 ◽  
Vol 21 (1 Part A) ◽  
pp. 233-242 ◽  
Author(s):  
Jagdeep Kshirsagar ◽  
Ramakant Shrivastava ◽  
Prakash Adwani
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Base Fluid ◽  
Sol Gel ◽  
Copper Oxide Nanoparticles ◽  
Cuo Nanoparticles ◽  
Oxide Nanoparticles ◽  
Heater Surface

The main focus of the present work is to prepare the CuO nanoparticles by economical Sol-Gel method and further to prepare the CuO nanofluid with base fluid as deionised water. The size of nanoparticles is determined by Debye- Scherer formula and size of the particles is conformed 20.4054nm. Critical heat flux characteristics of nanofluid were investigated with different weight concentrations of CuO nanoparticles. The experimental work revealed an increase in critical heat flux value just about 57.26 percent. Surface roughness of heater surface is measured for all weight concentrations of nanofluid which shows increase in Ra value up to some extent is a cause to enhance CHF.

Sign in / Sign up

Export Citation Format

Share Document