نتایج جستجو برای: UV/visible spectrophotometry

تعداد نتایج: 9288  

2014
Suprabha Nayar

Silver nanoparticles were synthesized in the protein-polymer matrices of two different ratios to obtain a stringent control over the morphology. UVvisible spectrophotometry showed a single plasmon resonance peak at 416nm and 418nm respectively, confirming the formation of silver nanoparticles. X-ray diffractometry confirmed that the peaks matched with that of the reference silver. Both confocal...

2015
K. V. Pavani

INTRODUCTION Engineered nanomaterials have received greater attention for their positive impact in improving many sectors of economy, including pharmaceutics, cosmetics, transportation, energy, agriculture and environment. Nanoparticles can drastically modify their physico-chemical properties compared to the bulk material, the improvement of experimental processes for the synthesis of these nan...

2012
HANA VASKOVA

One of the actual global problems is an issue of waste, its formation, disposal and possible secondary processing. Another closely related issue concerns hazardous waste which represents a potential threat to environment and human health. This paper is focused on an area of waste containing hexavalent chromium arising especially from leather industry. Hexavalent chromium is classified as a carc...

2014
A. K. Tiwari Tripti A. Jain S. Choubey V. K. Verma

In this paper, we have reported convenient way to access CdTe nanorods by solvothermal decomposition using single source molecular precursor cadmium (II) bis-(isopropyl telluro) propane (SSMP) and quinoline as solvent at relatively low temperature (200oC).As synthesized nanomaterials are structurally characterized by XRD, SEM and UVVisible spectroscopy. SEM micrographs revealed formation of rod...

2013
J.Therese Punitha S. Ananthalakshmi

Indole acetic acid complexes have been prepared and characterized by elemental analysis, H NMR and UVVisible spectra and electrochemical measurements. The antimicrobial properties of these compounds have been evaluated against the test strains (A.niger, St. aureusStreptococcus aureus) and thus a significant use of such compounds as antibacterial agent is reported. The biological activity data s...

2008
Alicia Viviana Veglia

From the effect of β-cyclodextrin and hydroxypropyl-β-cyclodextrin on the UVvisible and fluorescence spectra of carbaryl and carbofuran, the values of association constants were determined. The ratio of the fluorescence quantum yields for the bound and free substrates indicated an enhanced fluorimetric method of detection.

2015
R. Arivuselvi A. Ruban Kumar

A semiorganic crystal of zinc thiosemicarbazide sulfate (ZTSCS) has been grown aqueous solution by slow evaporation technique at room temperature. The material was subjected to various characterization techniques such as UV-Visible, non linear optical test, photoluminescence study, elemental analysis and Fourier transform infrared (FTIR) techniques. Cut off wavelength and band gap of the grown ...

2007
Saji Chacko Ninan Sajeeth Philip V. K. Vaidyan

SnO2 nanocrystalline thinfilms were prepared by spray pyrolysis method on glass substrates at 375, 400, 425, 450 and 500oC. Structural, optical and electrical properties of these films were studied by XRD, UVVisible and Four-probe methods. The change in electrical conductivity, band gap and optical transmittance was found to be a function of the change in lattice parameters ∆a and ∆c. The sampl...

2016
Myunghee Lim Younggyu Son Eunju Cho Ardiansyah Taufik

Fe3O4/CuO/ZnO nanocomposites with different molar ratio were synthesized using sol-gel method. The as-synthesized samples were characterized by X-ray diffraction (XRD), UVvisible spectroscopy, BET surface area analyszer, and Electron Spin Resonance (ESR). The sonocatalytic-photocatalytic-sonophotocatalytic activity of as-synthesized samples was investigated based on methylene blue degradation. ...

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