Characterization of Enhanced Antibacterial Effects of Silver Loaded Cerium Oxide Catalyst

Silver-cerium nanoparticles had been successfully synthesized using the sol-gel method by silver nitrate as a source of silver and cerium nitrate hexahydrate as a source of cerium. The synthesized silver-cerium nanoparticles had been characterized by X-ray diffraction,transmission electron microscopy, and scanning electron microscopy-energy dispersive X-ray. Based on the results of XRD and TEM analysis showed silver-cerium nanoparticles were spherical with the dominant size range of 8.9 -12.73 nm. SEM-EDX analysis showed silver nanoparticles covered by cerium nanoparticles that were known as the core-shell structure. Silver nanoparticles doped with cerium nanoparticles (CeONP) showed an increase in inhibitory with an increase a zone of inhibition after being doped with cerium nanoparticles. The disinfection effect of Ag-doped CeONP was more pronounced on Staphylococcus aureus than Escherichia coli, although the difference was not wide.

Download Full-text

Characterization of Y/TiO2 Nanoparticles and their Reactivity for CO2 Photoreduction

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.55-57.1506 ◽

2011 ◽

Vol 55-57 ◽

pp. 1506-1510 ◽

Cited By ~ 3

Author(s):

Jing Wei ◽

Xin Tan ◽

Tao Yu ◽

Lin Zhao

Keyword(s):

Electron Microscopy ◽

Photoelectron Spectroscopy ◽

Sol Gel ◽

Chemical Properties ◽

X Ray Diffraction ◽

X Ray ◽

Uv Illumination ◽

Transmission Electron ◽

And Chemical Properties

A series of Y/TiO2nanoparticles (NPs) were synthesized via sol-gel method. The crystal structures, morphologies and chemical properties were characterized using X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). We investigated the effects of different doping amounts of Y on the reaction of CO2photoreduction. The results shown that 0.1 wt.%Y/TiO2(0.1YT) performed the highest photocatalytic activity, which yielded 384.62 µmol/g∙cat. formaldehyde after 6 h of UV illumination.

Download Full-text

Obtaining and Characterization of TiO2-GO Composites for Photocatalytic Applications

International Journal of Photoenergy ◽

10.1155/2020/3489218 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

D. K. Calvo Ramos ◽

M. Vega González ◽

R. A. Esparza Muñóz ◽

J. Santos Cruz ◽

F. J. De Moure-Flores ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Uv Radiation ◽

Uv Light ◽

Sol Gel ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Scanning Transmission

Titanium dioxide (TD) and graphene oxide (GO) were synthesized by sol-gel and improved Hummers method, respectively. This study shows the results of the incorporation through four different conditions (sol-gel, sol-gel and ultrasonic, annealed, and UV radiation, C1 to C4, respectively). It was observed that a homogeneous incorporation of TD on sheets of GO was obtained satisfactorily. The composites of TiO2/GO were characterized using different techniques such as X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), energy dispersive X-ray spectroscopy (EDS), Raman spectroscopy, and infrared spectroscopy (IR). The photocatalytic activity of the composites was determined from the degradation of the dye azo tartrazine using UV and solar radiation. The best incorporation of TD nanoparticles on GO was obtained with condition C3 (thermal incorporation method) at a temperature of 65°C. This shows a uniformity in the size and shape of the TD as well as an excellent adherence to the sheet of GO. This addition is accomplished by ionic bonding in the presence of electrostatic Coulomb forces. The C3 composite degraded the tartrazine dye using UV radiation and sunlight. With the latter, the degradation time was three times faster than using UV light.

Download Full-text

Synthesis, characterization, and photocatalytic properties of pyrochlore Bi2Ti2O7 nanotubes

Journal of Materials Research ◽

10.1557/jmr.2006.0362 ◽

2006 ◽

Vol 21 (11) ◽

pp. 2941-2947 ◽

Cited By ~ 22

Author(s):

Hongjun Zhou ◽

Tae-Jin Park ◽

Stanislaus S. Wong

Keyword(s):

Electron Microscopy ◽

Sol Gel ◽

Bulk Sample ◽

X Ray Diffraction ◽

Alumina Template ◽

X Ray ◽

Selected Area Electron Diffraction ◽

Transmission Electron ◽

High Resolution Tem

Bismuth titanate (Bi2Ti2O7) nanotubes were successfully synthesized with an alumina template-based sol-gel technique. As-synthesized nanotubes are smooth and uniform with diameters ranging from 180 to 330 nm and lengths varying from 7 to 12 μm. Extensive characterization of as-prepared samples has been performed using x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), energy-dispersive x-ray spectroscopy (EDS), and selected-area electron diffraction (SAED). Photocatalytic studies indicate that as-prepared nanotubes possess higher photocatalytic activity than the corresponding bulk sample prepared without the use of an alumina template.

Download Full-text

Detonation Synthesis of Nano-Size Materials

MRS Proceedings ◽

10.1557/proc-418-439 ◽

1995 ◽

Vol 418 ◽

Cited By ~ 1

Author(s):

J. Forbes ◽

J. Davis ◽

C. Wong

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Nucleation And Growth ◽

Detonation Synthesis ◽

X Ray Diffraction ◽

Crystalline Materials ◽

X Ray ◽

Transmission Electron ◽

Nano Size

AbstractThe detonation of explosives typically creates 100's of kbar pressures and 1000's K temperatures. These pressures and temperatures last for only a fraction of a microsecond as the products expand. Nucleation and growth of crystalline materials can occur under these conditions. Recovery of these materials is difficult but can occur in some circumstances. This paper describes the detonation synthesis facility, recovery of nano-size diamond, and plans to synthesize other nano-size materials by modifying the chemical composition of explosive compounds. The characterization of nano-size diamonds by transmission electron microscopy and electron diffraction, X-ray diffraction and Raman spectroscopy will also be reported.

Download Full-text

Hydrothermal Synthesis and Characterization of BiFeO3 Polyhedral Crystallites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.508 ◽

2012 ◽

Vol 174-177 ◽

pp. 508-511

Author(s):

Lin Lin Yang ◽

Yong Gang Wang ◽

Yu Jiang Wang ◽

Xiao Feng Wang

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Transmission Electron Microscopy ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

Xrd Pattern ◽

X Ray ◽

Transmission Electron ◽

Scanning Electron

BiFeO3 polyhedrons had been successfully synthesized via a hydrothermal method. The as-prepared products were characterized by power X-ray diffraction (XRD) pattern, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The possible mechanisms for the formation of BiFeO3 polyhedrons were discussed. Though comparison experiments, it was found that the kind of precursor played a key role on the morphology control of BiFeO3 crystals.

Download Full-text

In Situ Study of the Reaction Sequence in the Sol–Gel Synthesis of a (Ba0.5Sr0.5)(Co0.8Fe0.2)O3−δPerovskite by X-Ray Diffraction and Transmission Electron Microscopy

Journal of the American Ceramic Society ◽

10.1111/j.1551-2916.2007.01932.x ◽

2007 ◽

Vol 90 (11) ◽

pp. 3651-3655 ◽

Cited By ~ 16

Author(s):

Mirko Arnold ◽

Haihui Wang ◽

Julia Martynczuk ◽

Armin Feldhoff

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Sol Gel ◽

X Ray Diffraction ◽

Reaction Sequence ◽

X Ray ◽

In Situ Study ◽

Transmission Electron ◽

Sol Gel Synthesis

Download Full-text

Optimization of Green Synthesis Approach of Silver Nanoparticles Using Indonesian Wild Honey

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.891.111 ◽

2021 ◽

Vol 891 ◽

pp. 111-115

Author(s):

Maradhana Agung Marsudi ◽

Farah Fitria Sari ◽

Pandu Mauliddin Wicaksono ◽

Adinda Asmoro ◽

Arif Basuki ◽

...

Keyword(s):

Electron Microscopy ◽

Silver Nanoparticles ◽

Green Synthesis ◽

Synthesis Method ◽

X Ray Diffraction ◽

X Ray ◽

Particle Count ◽

Transmission Electron ◽

Nitrate Precursor ◽

Synthesis Approach

In this work, silver nanoparticles have been successfully synthesized using simple and environmentally friendly ‘green synthesis’ method using Indonesian wild honey as mediator. Particle count and size can be optimized by varying the silver nitrate precursor and honey concentration, with the help of sodium hydroxide as pH regulator. Based on X-ray diffraction (XRD) result, crystalline structure of Ag has been confirmed in sample with impurities from AgCl. Based on dynamic light scattering (DLS) and transmission electron microscopy (TEM) results, it was found that the smallest average particles size of AgNPs (117.5 nm from DLS and 11.1 nm from TEM) was obtained at sample with 5% w/v of honey and 0.5 mM of AgNO3.

Download Full-text

Synthesis and characterization of homogeneous lead-substituted tin oxide with the (110) face of rutile structure

Journal of Materials Research ◽

10.1557/jmr.2000.0298 ◽

2000 ◽

Vol 15 (10) ◽

pp. 2076-2079

Author(s):

Chika Nozaki ◽

Takashi Yamada ◽

Kenji Tabata ◽

Eiji Suzuki

Keyword(s):

Electron Microscopy ◽

Tin Oxide ◽

Photoelectron Spectroscopy ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

Rutile Structure ◽

X Ray ◽

Transmission Electron ◽

Scanning Electron

Synthesis of a rutile-type lead-substituted tin oxide with (110) face was investigated. The characterization was performed by x-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive x-ray spectroscopy, infrared spectroscopy, x-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller surface area measurements. The homogeneous rutile-type lead-substituted tin oxide was obtained until 4.1 mol% of tin was substituted with lead. The surface of obtained oxide had a homogeneously lead-substituted (110) face.

Download Full-text

Characterization of Fe–Ni(C) nanocapsules synthesized by arc discharge in methane

Journal of Materials Research ◽

10.1557/jmr.1999.0240 ◽

1999 ◽

Vol 14 (5) ◽

pp. 1782-1790 ◽

Cited By ~ 35

Author(s):

X. L. Dong ◽

Z. D. Zhang ◽

S. R. Jin ◽

W. M. Sun ◽

X. G. Zhao ◽

...

Keyword(s):

Electron Microscopy ◽

Photoelectron Spectroscopy ◽

Arc Discharge ◽

Carbon Layer ◽

Magnetization Measurement ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Energy Disperse Spectroscopy

Ultrafine Fe–Ni(C) particles of various compositions were prepared by arc discharge synthesis in a methane atmosphere. The particles were characterized by x-ray diffraction, transmission electron microscopy, energy disperse spectroscopy, chemical analysis, x-ray photoelectron spectroscopy, Mössbauer spectroscopy, and magnetization measurement. The carbon atoms solubilizing at interstitial sites in γ–(Fe, Ni, C) solution particles have the effects of forming austenite structure and changing microstructures as well as magnetic properties. A carbon layer covers the surface of Fe–Ni(C) particles to form the nanocapsules and protect them from oxidization. The mechanism of forming Fe–Ni(C) nanocapsules in the methane atmosphere was analyzed.

Download Full-text