scholarly journals New palladium–oxazoline complexes: Synthesis and evaluation of the optical properties and the catalytic power during the oxidation of textile dyes

2015 ◽  
Vol 11 ◽  
pp. 1175-1186 ◽  
Author(s):  
Rym Hassani ◽  
Mahjoub Jabli ◽  
Yakdhane Kacem ◽  
Jérôme Marrot ◽  
Damien Prim ◽  
...  
Keyword(s):  
Optical Properties ◽  
Spectroscopic Analysis ◽  
Palladium Complexes ◽  
X Ray Diffraction ◽  
Factors Affecting ◽  
Enantiomerically Pure ◽  
One Step ◽  
Uv Visible ◽  
High Yields

The present paper describes the synthesis of new palladium–oxazoline complexes in one step with good to high yields (68–95%). The oxazolines were prepared from enantiomerically pure α-aminoalcohols. The structures of the synthesized palladium complexes were confirmed by NMR, FTIR, TOFMS, UV–visible spectroscopic analysis and X–ray diffraction. The optical properties of the complexes were evaluated by the determination of the gap energy values (E g) ranging between 2.34 and 3.21 eV. Their catalytic activities were tested for the degradation of Eriochrome Blue Black B (a model of azo dyes) in the presence of an ecological oxidant (H2O2). The efficiency of the decolorization has been confirmed via UV–visible spectroscopic analysis and the factors affecting the degradation phenomenon have been studied. The removal of the Eriochrome reached high yields. We have found that the complex 9 promoted 84% of color elimination within 5 min (C 0 = 30 mg/L, T = 22 °C, pH 7, H2O2 = 0.5 mL) and the energetic parameters have been also determined.

Hierarchical Nanostructured ZnO-CuO Nanocomposite and its Photocatalytic Activity

2015 ◽  
Vol 35 ◽  
pp. 21-26 ◽  
Author(s):  
Susmita Das ◽  
Vimal Chandra Srivastava
Keyword(s):  
Photocatalytic Activity ◽  
Pure Copper ◽  
Ultra Violet ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ultra Violet Radiation ◽  
One Step ◽  
Uv Visible

Metal oxide nanocomposite (ZnO-CuO) was successfully synthesized by one step homogeneous coprecipitation method and further characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron micrograph (SEM), X-ray diffraction analysis (XRD) and UV-visible diffuse reflectance spectra. XRD analysis exhibited presence of pure copper oxide and zinc oxide within the nanocomposite. SEM analysis indicated that the ZnO-CuO nanocomposite was consisted of flower shaped ZnO along with leaf shaped CuO. Photocatalytic activity of nanocomposite was evaluated in terms of degradation of methylene blue (MB) dye solution under ultra-violet radiation. Results showed that the photocatalytic efficiency of ZnO-CuO nanocomposite was higher than its individual pure oxides (ZnO or CuO).

Synthesis, characterization and determination of absolute structures of palladium complexes of novel chiral acyclic tellurated Schiff base ligands

2018 ◽  
Vol 42 (8) ◽  
pp. 6264-6273 ◽  
Author(s):  
H. R. Rajegowda ◽  
P. Raghavendra Kumar ◽  
Amar Hosamani ◽  
R. J. Butcher
Keyword(s):  
Schiff Base ◽  
Palladium Complexes ◽  
Schiff Base Ligands ◽  
Enantiomerically Pure ◽  
Organotellurium Ligands

Enantiomerically pure chiral hybrid organotellurium ligands and their asymmetric palladium complexes have been synthesized and characterized.

An Investigation on Structural and Optical Properties of Nanocrystalline Bismuth Ferrite and Manganese Sillenite Powders

2020 ◽  
Vol 835 ◽  
pp. 317-323
Author(s):  
D.A. Rayan ◽  
E.A. Abdel-Mawla ◽  
S.K. Mohamed ◽  
A.A. Mohamed ◽  
Mohamed M. Rashad
Keyword(s):  
Optical Properties ◽  
Bismuth Ferrite ◽  
Ammonium Hydroxide ◽  
Band Gap Energy ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Munk Function ◽  
Ft Ir ◽  
Uv Visible ◽  
Co Precipitation

Nanocrystalline bismuth ferrite BFO; BiFeO3 and manganese sillenite, BMO; Bi12MnO20 (BMO) powders have been successfully elaborated using a facile co-precipitation approach. The formed materials were examined using X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FE-SEM). Furthermore, the change in the optical properties was performed based on Fourier transform infrared spectroscopy (FT-IR) and UV-visible spectrophotometer. Typical, pure BiFeO3 and Bi12MnO20 phases were detected for the precursors precipitated at pH 10 based on ammonium hydroxide as a base then annealed at 500°C for 2h. Eventually, the optical band gap energy of BFO and BMO using Kubelka–Munk function based on Tauc’s plot was found to be 2.12 and 2.79 eV, respectively.

scholarly journals Study the structural and optical properties of nanostructure ZnS thin film prepared by Radio frequency (RF) magnetron sputtering technique

2019 ◽  
Vol 24 (6) ◽  
pp. 93
Author(s):  
Azhar Mohammed Abed1 ◽  
, Abdulhussain K. Elttayef2 ◽  
Khalid Hamdi Razeg1
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Magnetron Sputtering ◽  
Film Thickness ◽  
Rf Magnetron Sputtering ◽  
X Ray Diffraction ◽  
Sem Image ◽  
Maximum Particle ◽  
Uv Visible ◽  
Different Thickness

Zinc sulfide (ZnS) thin films were deposited on glass substrate with different thickness by radiofrequency (RF) magnetron sputtering technique, and deals with effect of thickness on the optical and structural properties. The structure, surface morphology and optical properties are investigated by x-ray diffraction (XRD), atomic forces microscopy (AFM), scanning electron microscopy, and UV-visible spectrophotometer.  The result of XRD show that ZnS thin film exhibited cubic structure with strong peaks at (111) as highly preferential orientation. The maximum particle size of films was found to be 14.4 at thickness 868nm. SEM image show that the shape of grain is like spherical. The result of AFM shows that the surface roughness decrease with increasing in film thickness from (6.19 to 1.45)nm. The result of UV-visible suggests that transmittance increasing with increases in film thickness, the value maximum of ZnS transmission was 87.82%  at thickness 868nm, can be very much useful in the field of solar cell and optical sensor .   http://dx.doi.org/10.25130/tjps.24.2019.113

Studying some Optical Properties of Polyethylene Glycol Doped with Al- Nanoparticles

2020 ◽  
Vol 1002 ◽  
pp. 104-113
Author(s):  
Elham Talib Abd-Al Hussein ◽  
Awham M. Hameed
Keyword(s):  
Optical Properties ◽  
Polyethylene Glycol ◽  
X Ray Diffraction ◽  
Al Nanoparticles ◽  
Nanocomposite Thin Films ◽  
Solution Casting Method ◽  
Uv Visible ◽  
Microscopy Images ◽  
Improved Characteristics ◽  
Morphology Of Surface

This research aims to improve some optical properties of polyethylene glycol (PEG) by adding different weight percentages of aluminium nanoparticles )0, 2, 4, 6 and 8) % and for achieving a new composite material with improved characteristics. nanocomposite thin films were prepared by solution casting method with different weight percentages of Al nanoparticles. The samples were characterized by X-ray diffraction (XRD), FTIR and UV-visible spectrophotometer. FTIR-spectra of (PEG-Al) nanocomposite show various special bands of bending for groups (C=O, C–O, C–H, C-N, C-I). Optical microscopy images illustrate the morphology of surface for (PEG) composite. The optical properties measurement by using (UV–VIS) spectrophotometer at wavelength range )220 – 1100(nm were determined. Results show that the absorbance spectrum increased with increase the weight percentages of Al-nanoparticles and the values of absorption coefficient have increased as well as refractive index values increased with the addition of aluminium nanoparticle

Structural and Optical Studies on Nanosized Thermoelectric Oxide-Zn1−xAlxO

2018 ◽  
Vol 18 (06) ◽  
pp. 1850038 ◽  
Author(s):  
Rishi Prasad ◽  
Shekhar D. Bhame ◽  
Pravin Walke
Keyword(s):  
Optical Properties ◽  
Crystallite Size ◽  
Morphological Analysis ◽  
X Ray Diffraction ◽  
Thermoelectric Oxide ◽  
Structural And Optical Properties ◽  
Optical Studies ◽  
Tauc Plot ◽  
Wurtzite Crystal Structure ◽  
Uv Visible

Aluminum doped ZnO ([Formula: see text]AlxO, [Formula: see text], 0.02, 0.03 and 0.04) (AZO) nanoparticles were synthesized using citrate-gel method. We report the effect of aluminum doping along with variation of metal to citrate ratio on structural and optical properties of AZO nanoparticles with crystallite size optimization. The X-ray diffraction analysis confirmed Wurtzite crystal structure wherein the crystallite size was within the range of 15–40[Formula: see text]nm. Optical properties were studied with the help of UV-Visible spectroscopy. Bandgap calculated using Tauc plot is found to be between the range of 2.39–2.75[Formula: see text]eV and morphological analysis using Scanning Electron Microscopy (SEM) showed the distribution of synthesized material.

Preparation, structural investigation and optical properties determination of composite films based on PAZO polymer doped with GeTe4-Cu chalcogenide particles

2021 ◽  
Author(s):  
Ani Stoilova ◽  
Dean Dimov ◽  
Yordanka Trifonova ◽  
Vanya Lilova ◽  
Blaga Blagoeva ◽  
...  
Keyword(s):  
Optical Properties ◽  
Structural Investigation ◽  
Bulk Material ◽  
Composite Films ◽  
Optical Absorption Coefficient ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Reflectance Coefficient ◽  
Diode Pumped

The work presents preparation, structural investigation and optical properties characterization of composite films based on the azopolymer (poly[1-[4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2- ethanediyl, sodium salt]), shortly PAZO, doped with 1 wt.% particles of the previously synthesized by us new tellurium containing chalcogenide system (GeTe4)100-xCux, where x = 5, 10, 15 and 20 mol.%. X-Ray diffraction (XRD) was applied to analyze the structure of the chalcogenide bulk material. Transmission electron microscopy (TEM) has been used to study the particles and the composite films morphology. The transmittance coefficient (T), the reflectance coefficient (R), the refractive index (n), the extinction coefficient (k), the optical absorption coefficient (α) and the optical band gap (E_g^opt) of the composite films were determined. Birefringence was induced by a He-Cd laser with a wavelength 442 nm and measured with probe Diode Pumped Solid State (DPSS) laser at 635 nm. The influence of the dopants concentration on the optical performance of the composite films has been discussed.

One-Step Hydrothermal Synthesis of Cu2ZnSn(S, Se)4 Nanoparticles: Structural and Optical Properties

2020 ◽  
Vol 12 (3) ◽  
pp. 338-344
Author(s):  
Sadanand ◽  
D. K. Dwivedi ◽  
Fahad A. Alharthi ◽  
Adel El Marghany
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Hydrothermal Process ◽  
X Ray Diffraction ◽  
Thermal Evaporation Method ◽  
Photovoltaic Energy Conversion ◽  
Vis Spectroscopy ◽  
One Step ◽  
Low Toxicity ◽  
High Absorption Coefficient

Cu2ZnSn(S, Se)4(CZTSSe) have become increasingly popular due to the improved efficiency with different architectures for various types of solar cells. Due to its high absorption coefficient, low toxicity, an abundance of its components, and direct bandgap, it attracted intense attention as an absorbent material for thin-film solar cells. According to the Shockley–Queisser (S–Q) detailedbalance model, the constraining performance of photovoltaic energy conversion for single-junction solar cells is 33.7%, for an ideal 1.34 eV bandgap. In the present study, we have prepared a CZTSSe nanoparticle using the hydrothermal process. The film of the CZTSSe nanoparticles has been developed by the thermal evaporation method. The structural and surface morphology have been investigated by x-ray diffraction (XRD), field emission scanning electron microscope (FESEM), and Raman-scattering. UV-Vis spectroscopy has been used to study the optical properties of synthesized nanoparticles for solar cell applications. This research suggests that the synthesized nanoparticles could be used as an efficient device for photovoltaic modules.

scholarly journals Preparation of Chloro Penta Amine Cobalt(III) Chloride and Study of Its Influence on the Structural and Some Optical Properties of Polyvinyl Acetate

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Nada K. Abbas ◽  
Majeed Ali Habeeb ◽  
Alaa J. Kadham Algidsawi
Keyword(s):  
Optical Properties ◽  
Optical Conductivity ◽  
Polyvinyl Acetate ◽  
Composite Films ◽  
Visible Spectrum ◽  
Weight Percent ◽  
Polymeric Films ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Uv Visible

Chloro penta amine cobalt(III) cloride [Co(NH3)5Cl]Cl2was prepared and then characterized by Fourier transform infrared spectroscopy and X-ray diffraction. The obtained results indicated the formation of orthorhombic [Co(NH3)5Cl]Cl2nanoparticles of ≈28.75 nm size. Polymeric films based on polyvinyl acetate (PVAc) doped with chloro penta amine cobalt(III) cloride [Co(NH3)5Cl]Cl2in different weight percent ratios were prepared using the solvent cast technique. The complexation of the additive with the polymer was confirmed by FTIR and SEM studies. The XRD pattern revealed that the amorphousicity of PVAc polymer matrix increased with raising the [Co(NH3)5Cl]Cl2content. Parameters such as extinction coefficient, refractive index, real and imaginary parts, and optical conductivity were studied by using the absorbance and measurements from computerized UV-visible spectrophotometer in the spectral range 190–800 nm. This study showed that the optical properties of PVAc were affected by the doping of [Co(NH3)5Cl]Cl2where the absorption increased by leveling up [Co(NH3)5Cl]Cl2concentration. The nature of electronic transition from valence band to conduction band was determined and the energy band gaps of the composite films samples were estimated by UV-visible spectrum. It was observed that the optical conductivity increased with photon energy and with the increase of [Co(NH3)5Cl]Cl2concentration.

Structural and Photocatalytic Properties of Fe-Dope TiO2 Nanostructure Using the Hydrothermal Treatment Method

2013 ◽  
Vol 634-638 ◽  
pp. 2261-2263
Author(s):  
Khun Ngern Supunnee ◽  
Vatcharinkorn Mekla ◽  
Eakkarach Raksasri
Keyword(s):  
Optical Properties ◽  
Hydrothermal Treatment ◽  
Treatment Method ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Cuo Nanostructure ◽  
Uv Visible ◽  
Xrd Patterns ◽  
Top View

In this work optical properties of CuO nanostructure were studied. CuO nanostructure were synthesized by the hydrothermal treatment method. The structural and chemical natures of the obtained materials were studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and study optical properties by UV-visible spectral. The XRD patterns of the CuO nanostructures indicated that CuO phases (JCPDS 05- 0661). The top-view SEM images, it can be seen clearly that high-density, horizontally scattered nanorod were grown on the product prepared at concentration of NaOH (aq) 7.5 M at 180 C for 12 h. The spectral of UV-vis data recorded showed the strong cut off at 341 nm.

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