A study of the phase transition of reheated diphenyl carbazide (DPC) by using UV spectroscopy

El-Kabbany, F.; Taha, S.; Hafez, M.

doi:10.1016/j.saa.2014.02.143

Cited by 18 publications

(10 citation statements)

References 21 publications

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“…Moreover, Fig. 3 for the electronic transitions from band to band (*) [22]. In this present study, the obtained ODR results are matched with the published work by A.R.…”

Section: Optical Properties Of Nanostructuredsupporting

confidence: 91%

Enhancing the electrical, optical, and structure morphology using Pr2O3-ZnO nanocomposites: Towards electronic varistors and environmental photocatalytic activity

AlAbdulaal¹,

AlShadidi²,

Hussien³

et al. 2021

Journal of Photochemistry and Photobiology A: Chemistry

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“…Moreover, Fig. 3 for the electronic transitions from band to band (*) [22]. In this present study, the obtained ODR results are matched with the published work by A.R.…”

Section: Optical Properties Of Nanostructuredsupporting

confidence: 91%

Enhancing the electrical, optical, and structure morphology using Pr2O3-ZnO nanocomposites: Towards electronic varistors and environmental photocatalytic activity

AlAbdulaal¹,

AlShadidi²,

Hussien³

et al. 2021

Journal of Photochemistry and Photobiology A: Chemistry

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“…Therefore, the highest doping ratios of Y2O3 (i.e., S7) has the highest absorbance, which is in good agreement with the structure morphology results from both XRD, SEM analysis, and other published studies. K. shows the maximum absorption values at a light wavelength of around 380 nm, distinctive for electronic transitions from band to the band (*) [34,35]. It was noted that the UV-vis diffuse reflectance measurements are in a great match with the J. Zhao et.…”

Section: Fourier Transformation Infrared (Ft-ir) Spectroscopymentioning

confidence: 81%

Structural, Morphological and Optical Bandgap Analysis of Multifunction Applications of Y2O3 -ZnO Nanocomposites : Varistors and Visible Photocatalytic Degradations of Wastewater

AlAbdulaal

AlShadidi

Hussien

et al. 2021

Preprint

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In this study, a combustion method as an efficient, easy, low-cost, and eco-friendly technique was used to synthesize nano-ZnO as a matrix with different yttrium doping ratios with different doping concentrations. Not only X-ray diffraction (XRD), but also scanning electron microscopy (SEM), and Fourier transformation Infrared spectroscopy (FT-IR) technique employed to characterize the structural and surface morphology of the Y2O3-ZnO nanocomposites. The obtained results supported ZnO's growth from crystalline to satisfactory nanoparticle structure by changing the yttrium doping concentrations inside ZnO nanoparticles. Moreover, UV-Vis diffuse reflectance spectroscopy, AC electrical conductivity, and current-voltage characteristics were considered to characterize the effects of yttrium doping on the energy bandgaps and electrical/dielectric properties and discussed the parameters of the ceramic varistors of the studied Y2O3-ZnO nano-complex oxides. The photocatalytic degradation efficiency of phenol, Methylene Blue, and Rhodamine B was investigated using all prepared Y2O3-ZnO nanostructured samples. As the yttrium doping ratios increased, the photocatalytic efficiency increased. After the addition of moderate Y3+ ions-doping, Further generation of hydroxyl radicals over ZnO. For Y2O3-ZnO (S5), the optimal photocatalyst is a degradation of 100 % of phenol, Methylene Blue, and Rhodamine B solutions compared to 80% of photocatalysis for ZnO stand alone. The prepared Y2O3-ZnO nanostructured materials are considered novel potential candidates in broad nano-applications ranging from biomedical and photocatalytic degradation for organic dyes and phenol to environmental and varistor applications.

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“…In order to realize the functioning of organic materials in device applications, studying their photophysical properties is important. Using UV–vis light absorption and photoluminescence (PL) spectroscopy, basic photophysical characteristics such as the absorption maxima (ʋ abs ), optical band gaps (E g opt ), optical density, molar extinction coefficient (log ɛ), oscillator strength (f), Stokes' shift (ʋ abs – ʋ em ), full width at half maximum (FWHM), CIE co‐ordinates of the molecules were determined and are summarized in Tables .…”

Section: Resultsmentioning

confidence: 99%

2‐(4‐Ethoxy phenyl)‐4‐phenyl quinoline organic phosphor for solution processed blue organic light‐emitting diodes

Ghate

Kalyani²,

Dhoble

2018

Luminescence

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This paper reports the synthesis and characterization of 2-(4-ethoxyphenyl)-4-phenyl quinoline (OEt-DPQ) organic phosphor using an acid-catalyzed Friedlander reaction and the preparation of blended thin films by molecularly doping OEt-DPQ in poly(methyl methacrylate) (PMMA) at different wt%. The molecular structure of the synthesized phosphor was confirmed by Fourier transform infra-red (FTIR) spectroscopy and nuclear magnetic resonance spectra (NMR). Surface morphology and percent composition of the elements were assessed by scanning electron microscopy (SEM) and energy dispersive analysis of X-rays (EDAX). The thermal stability and melting point of OEt-DPQ and thin films were probed by thermo-gravimetric analysis (TGA)/differential thermal analysis (DTA) and were found to be 80°C and 113.6°C, respectively. UV-visible optical absorption spectra of OEt-DPQ in the solid state and blended films produced absorption bands in the range 260-340 nm, while photoluminescence (PL) spectra of OEt-DPQ in the solid state and blended thin films demonstrated blue emission that was registered at 432 nm when excited at 363-369 nm. However, solvated OEt-DPQ in chloroform, tetrahydrofuran or dichloromethane showed a blue shift of 31-43 nm. Optical absorption and emission parameters such as molar extinction coefficient (ε), energy gap (E ), transmittance (T), reflectance (R), refractive index (n), oscillator energy (E ) and oscillator strength (f), quantum yield (φ ), oscillator energy (E ), dispersion energy (E ), Commission Internationale de l'Éclairage (CIE) co-ordinates and energy yield fluorescence (E ) were calculated to assess the phosphor's suitability as a blue emissive material for opto-electronic applications such as organic light-emitting diodes (OLEDs), flexible displays and solid-state lighting technology.

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A study of the phase transition of reheated diphenyl carbazide (DPC) by using UV spectroscopy

Cited by 18 publications

References 21 publications

Enhancing the electrical, optical, and structure morphology using Pr2O3-ZnO nanocomposites: Towards electronic varistors and environmental photocatalytic activity

Enhancing the electrical, optical, and structure morphology using Pr2O3-ZnO nanocomposites: Towards electronic varistors and environmental photocatalytic activity

Structural, Morphological and Optical Bandgap Analysis of Multifunction Applications of Y2O3 -ZnO Nanocomposites : Varistors and Visible Photocatalytic Degradations of Wastewater

2‐(4‐Ethoxy phenyl)‐4‐phenyl quinoline organic phosphor for solution processed blue organic light‐emitting diodes

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