Estimation of band gap and particle size of TiO2 nanoparticle synthesized using sol gel technique

2014 ◽  
Author(s):  
Manasi Manoj Karkare
Keyword(s):  
Particle Size ◽  
Band Gap ◽  
Sol Gel ◽  
Tio2 Nanoparticle ◽  
Gel Technique

Preparation and characterization of V2O5 doped SiO2-TiO2 thin films

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Marek Nocuń ◽  
Sławomir Kwaśny
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Dip Coating ◽  
Band Gap Energy ◽  
Tio2 Thin Films ◽  
Glass Substrates ◽  
Gel Technique

AbstractIn our investigation, V doped SiO2/TiO2 thin films were prepared on glass substrates by dip coating sol-gel technique. Chemical composition of the samples was studied by X-ray photoelectron spectroscopy (XPS). Transmittance of the samples was characterized using UV-VIS spectrophotometry. Subsequently band-gap energy (Eg) was estimated for these films. Powders obtained from sols were characterized by FTIR spectroscopy. It was found that vanadium decreases optical band gap of SSiO2/TiO2 films.

Controlled synthesis and enhanced photoelectro-catalytic activity of a 3D TiO2 nanotube array/TiO2 nanoparticle heterojunction using a combined dielectrophoresis/sol–gel method

2019 ◽  
Vol 7 (17) ◽  
pp. 4981-4987 ◽  
Author(s):  
Ruiyu Bao ◽  
Chen Chen ◽  
Jianxin Xia ◽  
Huiying Chen ◽  
Hua Li
Keyword(s):  
Particle Size ◽  
Catalytic Activity ◽  
Surface Morphology ◽  
Sol Gel ◽  
Tio2 Nanoparticle ◽  
Controlled Synthesis ◽  
Tio2 Nanotube Array ◽  
Nanotube Array ◽  
Gel Method ◽  
Sol Gel Method

The surface morphology and particle size of materials can be controlled using DEP technology.

scholarly journals One-Step Synthesis, Structure, and Band Gap Properties of SnO2 Nanoparticles Made by a Low Temperature Nonaqueous Sol–Gel Technique

ACS Omega ◽  
2018 ◽  
Vol 3 (10) ◽  
pp. 13227-13238 ◽  
Author(s):  
Mohamed Karmaoui ◽  
Ana Belen Jorge ◽  
Paul F. McMillan ◽  
Abil E. Aliev ◽  
Robert C. Pullar ◽  
...  
Keyword(s):  
Low Temperature ◽  
Band Gap ◽  
Sno2 Nanoparticles ◽  
Sol Gel ◽  
One Step ◽  
Gel Technique

Modified Sol-Gel Processing of NiCr2O4 Nanoparticles; Structural Analysis and Optical Band Gap

2017 ◽  
Vol 36 (2) ◽  
pp. 121-125 ◽  
Author(s):  
Morteza Enhessari ◽  
Ali Salehabadi ◽  
Salah Khanahmadzadeh ◽  
Kamal Arkat ◽  
Jalal Nouri
Keyword(s):  
Particle Size ◽  
Band Gap ◽  
Optical Band Gap ◽  
Sol Gel ◽  
Complexing Agent ◽  
Minor Phase ◽  
Absorption Bands ◽  
Ammonium Dichromate ◽  
Electrical Devices ◽  
Gel Processing

AbstractNickel Chromite nanoparticles were successfully synthesized via a modified sol-gel method using nickel acetate and ammonium dichromate in melted stearic acid as a complexing agent. The diffractograms of the nanoparticles confirmed a pure formation of NiCr2O4 spinel without any minor phase. The coordination structure of as prepared nanoparticles shows a series of absorption bands below 1,000 cm−1 were evidenced the M-O (Cr-O, Ni-O) bond in the sample. Optical band gap, magnetic properties and color parameters (L*.a*.b*) indicates that the final nanoparticles are optically and magnetically active. The particle size of NiCr2O4 was calculated using Scherrer equation at about 24 nm. Optical band gap obtained at 1.7 eV indicating that NiCr2O4 nanoparticles are semiconductor material and can be used in electrical devices.

scholarly journals One-Step Synthesis, Structure, and Band Gap Properties of SnO2 Nanoparticles Made by a Low Temperature Nonaqueous Sol–Gel Technique

ACS Omega ◽  
2018 ◽  
Vol 3 (11) ◽  
pp. 16386-16386
Author(s):  
Mohamed Karmaoui ◽  
Ana Belen Jorge ◽  
Paul F. McMillan ◽  
Abil E. Aliev ◽  
Robert C. Pullar ◽  
...  
Keyword(s):  
Low Temperature ◽  
Band Gap ◽  
Sno2 Nanoparticles ◽  
Sol Gel ◽  
One Step ◽  
Gel Technique

Fabrication of Ferromagnetic Fe/Mullite Composite Materials Via Sol-Gel Processing

1988 ◽  
Vol 132 ◽  
Author(s):  
Deanne P. Yamato ◽  
Abraham L. andis ◽  
Teh S. Kuan
Keyword(s):  
Particle Size ◽  
Composite Materials ◽  
Saturation Magnetization ◽  
Sol Gel ◽  
Iron Particle ◽  
Ferromagnetic Hysteresis ◽  
Gel Technique ◽  
Gel Processing ◽  
Iron Concentrations

ABSTRACTThe sol-gel technique was used to fabricate α-Fe/mullite composite materials with iron concentrations ranging from 20–60 wt.% Fe. Microscopy studies showed the microstructure to consist of particulate α-Fe dispersed uniformly throughout a mullite matrix. Iron particle size, estimated by TEM, ranged from 20–500 nm. The materials exhibited ferromagnetic hysteresis with saturation magnetization Ms values as high as 115 EMU/g.

Effects of particle size on the phase transition in Pb(Zr, Ti)O3 grown by the sol–gel technique

1998 ◽  
Vol 34 (3-6) ◽  
pp. 326-331 ◽  
Author(s):  
R Castro-Rodrı́guez ◽  
M Quadrelli ◽  
E Vasco ◽  
F Calderón ◽  
F Leccabue ◽  
...  
Keyword(s):  
Phase Transition ◽  
Particle Size ◽  
Sol Gel ◽  
Gel Technique

Controlling the Particle Size of Quantum Dots Incorporated in Hybrid Materials

1998 ◽  
Vol 519 ◽  
Author(s):  
Francisco Del Monte ◽  
Yuhuan Xu ◽  
John D. Mackenzie ◽  
B. Claflin ◽  
G. Lucovsky
Keyword(s):  
Particle Size ◽  
Chemical Interaction ◽  
Quantum Confinement Effect ◽  
Sol Gel ◽  
Average Particle Size ◽  
Average Particle ◽  
Aggregation Processes ◽  
Trifunctional Silane ◽  
Gel Technique

AbstractSemiconductor PbS quantum dot-doped Ormocers were successfully prepared by the sol-gel technique. Ormocers preparation was based on the use of trifunctional silane precursors at the solution stage. Formation of PbS particles took place in the pores of the Ormocers through lead precursor reaction with H2S gas. It was observed that temperature was an important factor in the reaction leading to the first appearance of PbS particles. The dot size of PbS was controlled through chemical interaction with the non-hydrolyzed groups of the trifunctional silane precursors. These groups prevent uncontrolled nucleation and aggregation processes during the particle formation and growth. The control of particle size was studied at different conditions for nucleation and aggregation. Determination of the average particle size was done by XR-Diffraction. Optical absorption spectra were also measured at the UV-VIS wavelength range. Absorption edge blue shifts show the quantum confinement effect in these materials.

Synthesis of Nanocrystalline Hydroxyapatite by Natural Biopolymers Based Sol-Gel Technique

2013 ◽  
Vol 747 ◽  
pp. 83-86
Author(s):  
Jutharatana Klinkaewnarong ◽  
Ekaphan Swatsitang
Keyword(s):  
Particle Size ◽  
Sol Gel ◽  
Hexagonal Structure ◽  
Line Broadening ◽  
X Ray Diffraction ◽  
X Ray ◽  
Amorphophallus Konjac ◽  
Selected Area Electron Diffraction ◽  
Nanocrystalline Hydroxyapatite ◽  
Gel Technique

Nanocrystalline hydroxyapatite (HAp) powders were successfully synthesized by natural biopolymers based sol-gel technique. The biopolymers were extracted from the leaves of Yanang (Tiliacora triandra), Krueo Ma Noy (Cissampelos pareira) and Konjac (Amorphophallus konjac). To obtain HAp powders, the prepared precursors were calcined in air at 600, 700, and 800 °C for 2 h. The phase composition of the calcined samples was studied by X-ray diffraction (XRD) technique. The XRD results confirmed the formation of HAp phase with a small trace of β-tricalcium phosphate (β-TCP). The crystalline sizes of the samples were found to be 20-50 nm as evaluated by the XRD line broadening method. TEM investigation revealed that the synthesized HAp samples consisted of nanoparticles with a particle size in the range of 50-100 nm in diameter. The corresponding selected area electron diffraction (SAED) analysis further confirmed the formation of hexagonal structure of HAp.

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