Ag2O/GO/TiO2 composite nanoparticles: synthesis, characterization, and optical studies

Anatase-Type Ti1-2xNbxAlxO2 Solid Solution/Silica (SiO2) Composite Nanoparticles: Synthesis, Phase Stability, and Photocatalytic Performance

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.2735 ◽

2010 ◽

Vol 654-656 ◽

pp. 2735-2738

Author(s):

Masanori Hirano ◽

Norio Kuno

Keyword(s):

Solid Solution ◽

Phase Transformation ◽

Photocatalytic Activity ◽

Photocatalytic Performance ◽

Rutile Phase ◽

Silica Content ◽

Composite Nanoparticles ◽

Hydrothermal Conditions ◽

Nanoparticles Synthesis ◽

Hydrolysis Of

Composite nanoparticles (anatase-type Ti1-2XNbXAlXO2 solid solution/SiO2) were directly synthesized from precursor solutions in the presence of urea under mild hydrothermal conditions at 180 °C for 5 h. The crystallite size of anatase was gradually decreased with increased silica content in the composite nanoparticles formed under weakly basic hydrothermal conditions via the hydrolysis of urea. The composite nanoparticles with composition Ti0.9Nb0.05Al0.05O2/SiO2 = 100/10 mol% showed good photocatalytic activity. The anatase-to-rutile phase transformation in the course of heating in air was retarded to maintain the anatase-type structure up to more than 1050 °C without a trace of rutile phase by the formation of composite nanoparticles (Ti0.90Nb0.05Al0.05O2/SiO2 = 100/20 mol%) with amorphous silica.

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OPTICAL STUDIES OF TYPE I AND TYPE II RECOMBINATION IN GaAs-AlAs QUANTUM WELLS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19875112 ◽

1987 ◽

Vol 48 (C5) ◽

pp. C5-525-C5-528 ◽

Cited By ~ 2

Author(s):

K. J. MOORE ◽

P. DAWSON ◽

C. T. FOXON

Keyword(s):

Quantum Wells ◽

Type I ◽

Type Ii ◽

Optical Studies

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A Biological Approach of Silver (Ag) Nanoparticles Synthesis Using Leaf Extract of Adhatoda Vasica

International Journal of Scientific Research ◽

10.15373/22778179/feb2014/57 ◽

2012 ◽

Vol 3 (2) ◽

pp. 177-179

Author(s):

Dr. K.Vinoth Kumar Dr. K.Vinoth Kumar ◽

◽

Dr. C. Udayasoorian Dr. C. Udayasoorian

Keyword(s):

Ag Nanoparticles ◽

Leaf Extract ◽

Adhatoda Vasica ◽

Biological Approach ◽

Nanoparticles Synthesis

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Magnetic Properties of Fe3O4/CoFe2O4 Composite Nanoparticles with Core/Shell Architecture

Ukrainian Journal of Physics ◽

10.15407/ujpe65.10.904 ◽

2020 ◽

Vol 65 (10) ◽

pp. 904

Author(s):

V. O. Zamorskyi ◽

Ya. M. Lytvynenko ◽

A. M. Pogorily ◽

A. I. Tovstolytkin ◽

S. O. Solopan ◽

...

Keyword(s):

Magnetic Properties ◽

Spinel Ferrite ◽

Composite Nanoparticles ◽

Core Shell ◽

Cofe2o4 Nanoparticles ◽

Core Diameter ◽

The Core ◽

Shell Particles ◽

Interface Parameters ◽

Shell Composite

Magnetic properties of the sets of Fe3O4(core)/CoFe2O4(shell) composite nanoparticles with a core diameter of about 6.3 nm and various shell thicknesses (0, 1.0, and 2.5 nm), as well as the mixtures of Fe3O4 and CoFe2O4 nanoparticles taken in the ratios corresponding to the core/shell material contents in the former case, have been studied. The results of magnetic research showed that the coating of magnetic nanoparticles with a shell gives rise to the appearance of two simultaneous effects: the modification of the core/shell interface parameters and the parameter change in both the nanoparticle’s core and shell themselves. As a result, the core/shell particles acquire new characteristics that are inherent neither to Fe3O4 nor to CoFe2O4. The obtained results open the way to the optimization and adaptation of the parameters of the core/shell spinel-ferrite-based nanoparticles for their application in various technological and biomedical domains.

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New Insights into the Nature of the Band Gap of CuGeO3 Nanoparticles: Synthesis, Electronic Structure, and Optical and Photocatalytic Properties

10.26434/chemrxiv.8362409.v1 ◽

2019 ◽

Author(s):

Victor Y. Suzuki ◽

Luís Henrique Cardozo Amorin ◽

Natália H. de Paula ◽

Anderson R. Albuquerque ◽

Julio Ricardo Sambrano ◽

...

Keyword(s):

Electronic Structure ◽

Band Gap ◽

Material Design ◽

Photocatalytic Properties ◽

Critical Parameters ◽

Synthetic Approach ◽

Microwave Assisted ◽

Theoretical Approaches ◽

Nanoparticles Synthesis ◽

First Time

We report, for the first time, new insights into the nature of the band gap of <a>CuGeO3 </a>(CGO) nanocrystals synthesized from a microwave-assisted hydrothermal method in the presence of citrate. To the best of our knowledge, this synthetic approach has the shortest reaction time and it works at the lowest temperatures reported in the literature for the preparation of these materials. The influence of the surfactant on the structural, electronic, optical, and photocatalytic properties of CGO nanocrystals is discussed by a combination of experimental and theoretical approaches, and that results elucidates the nature of the band gap of synthetized CGO nanocrystals. We believe that this particular strategy is one of the most critical parameters for the development of innovative applications and that result could shed some light on the emerging material design with entirely new properties.

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