Synthesis and Characterization of Nickel Oxide Nanostructures by Hydrothermal Method

2018 ◽  
Vol 24 (8) ◽  
pp. 5691-5694 ◽  
Author(s):  
D Sathisha ◽  
K. Gopalakrishna Naik
Keyword(s):  
Nickel Oxide ◽  
Hydrothermal Method ◽  
Optical Band Gap ◽  
Volume Ratio ◽  
Band Gap Energy ◽  
Visible Absorption ◽  
Oxide Nanostructures ◽  
Water As Solvent ◽  
Uv Visible

Nickel oxide (NiO) nanostructures were synthesized by hydrothermal method using ethylene glycol and double distilled water as solvent in 3:2 volume ratio. The synthesized nanostructures were characterized by XRD, FESEM, EDX, FTIR, and UV-visible spectroscopy. XRD result shows that the synthesized nanostructures are polycrystalline in nature. FESEM images show the growth of NiO nanowires. The elemental compositions of the samples were analyzed by EDS. Fourier transform infrared (FTIR) spectroscopy confirms the existence of Ni–O bond in the sample. Optical band gap energy of about 3.71 eV was calculated from the UV-visible absorption measurement.

Uniform Nano/Micron-Sized ZnO Spheres with Controllable Diameter

2012 ◽  
Vol 496 ◽  
pp. 268-271
Author(s):  
Ji Hang Cheng ◽  
Shuang Xu ◽  
Chang Hong Ding
Keyword(s):  
Hydrothermal Method ◽  
Absorption Spectra ◽  
Volume Ratio ◽  
Average Diameter ◽  
Absorption Peak ◽  
Nano Particles ◽  
Visible Absorption ◽  
Uv Visible

Novel uniform nano/micron-sized ZnO spheres assembled from the aggregation of nano-particles have been synthesized by hydrothermal method. It was observed that ZnO spheres with controllable diameter were obtained when various volume ratios of triethanolamine (TEA) to H2O were used. Increasing the volume ratio of TEA to H2O could result in the formation of loosely packed ZnO spheres. The UV-visible absorption spectra show that the absorption peak red-shifts with the increasing average diameter of the spheres.

Synthesis and Characterization of the Nano Semiconducting Material Cadmium Sulphide

2011 ◽  
Vol 699 ◽  
pp. 79-88
Author(s):  
S. Santhosh Kumar Jacob ◽  
Saravananakumar S. ◽  
R. Saravanan
Keyword(s):  
Optical Band Gap ◽  
Energy Gap ◽  
Cadmium Sulphide ◽  
Nano Particles ◽  
Precipitation Method ◽  
Nano Materials ◽  
Visible Absorption ◽  
X Ray ◽  
Uv Visible

In this work, CdS nano particles were synthesized using aqueous precipitation method; This method is simple, fast and can be carried out at room temperature. Various techniques like X-ray powder diffraction and UV-visible absorption spectroscopy are used for the structural characterization like electron density distribution and estimation of inter atomic distances between the atoms of the nano particles. The optical band gap of this material has been determined in order to establish a relationship between energy gap of bulk and nano materials.

Optical Properties and Structural Studies on Nd3+ Doped Borate Glasses Containing Heavy Metal Oxide

2012 ◽  
Vol 584 ◽  
pp. 207-211 ◽  
Author(s):  
Vijaya Chikkaveeraiah Veeranna Gowda ◽  
K.R Sardar Pasha ◽  
M. Sudhakar Reddy ◽  
C. Narayana Reddy
Keyword(s):  
Optical Band Gap ◽  
Band Gap Energy ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Absorption Studies ◽  
Amorphous Nature ◽  
Uv Visible ◽  
Quenching Method ◽  
Bi2o3 Content

Abstract. Neodymium doped sodium bismuth borate (Na2O-Bi2O3-B2O3) glasses were prepared by melt quenching method. Amorphous nature of the glass is confirmed through the X-ray diffraction study. Density of the investigated glasses increases systematically with Bi2O3 concentration. Glass transition temperature decrease slightly with increase of Bi2O3 content and could be due to increase in the number of weaker Bi-O linkages by stronger Nd-O linkages. Fourier Transform - Infrared (FTIR) spectroscopy has been carried out. The IR spectra of the glasses reveal that the strong network consisting of diborate units and is unaffected by the variation of Nd3+ concentration. UV-Visible absorption studies have been performed on these glasses to examine the optical spectra and the optical band gap energy has been calculated. The intensity of the absorption band increases with the increase of Nd3+ concentration. This is due to the formation of non-bridging oxygens (NBO’s) in the structure.

Synthesis of Fluorescent Magnetic and Plasmonic-Hybrid Multifunctional Nanopaticles

2014 ◽  
Vol 1081 ◽  
pp. 161-164
Author(s):  
Xue Mei Li ◽  
Zheng Guan ◽  
Hong Ling Liu ◽  
Jun Hua Wu ◽  
Xian Hong Wang ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Zno Nanoparticles ◽  
Poly Ethylene Glycol ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Good Magnetic Property ◽  
Uv Visible ◽  
Poly Ethylene ◽  
Poly Propylene

FeAu/ZnO nanoparticles were successfully synthesized by nanoemulsion process with the use of poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) as the surfactant. The characterization of the FeAu/ZnO nanoparticles was performed using X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy, showing that the polymer-laced nanoparticles reveal high crystallinity, excellent dispersibility and well defined optical performance. The process of solvent dispersion-collection of FeAu/ZnO nanoparticles indicates that the nanoparticles possess good magnetic property for applications.

scholarly journals Magnetic Nanoparticles of Zinc/Calcium Ferrite Decorated with Silver for Photodegradation of Dyes

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3582 ◽  
Author(s):  
Ricardo J. C. Fernandes ◽  
Carlos A. B. Magalhães ◽  
Carlos O. Amorim ◽  
Vítor S. Amaral ◽  
Bernardo G. Almeida ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Optical Band Gap ◽  
Magnetic Measurements ◽  
Ferrite Nanoparticles ◽  
Calcium Ferrite ◽  
Size Estimation ◽  
Visible Absorption ◽  
Uv Visible ◽  
Calcium Ferrites ◽  
Reactive Red 195

Magnetic nanoparticles of zinc/calcium ferrite and decorated with silver were prepared by coprecipitation method. The obtained nanoparticles were characterized by UV/Visible absorption, XRD, TEM and SQUID. The mixed zinc/calcium ferrites exhibit an optical band gap of 1.78 eV. HR-TEM imaging showed rectangular nanoplate shapes with sizes of 10 ± 3 nm and aspect ratio mainly between 1 and 1.5. Magnetic measurements indicated a superparamagnetic behavior. XRD diffractograms allowed a size estimation of 4 nm, which was associated with the nanoplate thickness. The silver-decorated zinc/calcium ferrite nanoparticles were successfully employed in the photodegradation of a model dye (Rhodamine B) and industrial textile dyes (CI Reactive Red 195, CI Reactive Blue 250 and CI Reactive Yellow 145). The nanosystems developed exhibited promising results for industrial application in effluent photoremediation using visible light, with the possibility of magnetic recovery.

Mixed-Solvothermal Preparation of Mace-Like CdS Nanocrystals

2012 ◽  
Vol 502 ◽  
pp. 164-168
Author(s):  
Ling Xu ◽  
Han Mei Hu ◽  
Hai Yan Xu
Keyword(s):  
Electron Microscopy ◽  
Large Scale ◽  
Volume Ratio ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Cds Nanostructures ◽  
Uv Visible ◽  
Solvothermal Preparation

Novel mace-like (wolf-teeth clubs) CdS nanostructures were successfully prepared on a large scale using CdCl2•2.5H2O and NH2CSNH2 as starting materials through a convenient mixed-solvothermal route. The as-synthesized products were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectrometry (EDX), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy. The experimental results reveal that the morphology of CdS products was greatly affected by the volume ratio of anhydrous ethanol and distilled water. The possible mechanism for the formation of mace-like CdS nanostructures is simply discussed.

SYNTHESIS AND CHARACTERIZATION OF HEXAMETHYLENE TETRAMINE (HMTA) CAPPED CdS NANOPARTICLES BY HYDROTHERMAL METHOD

2011 ◽  
Vol 10 (03) ◽  
pp. 441-445 ◽  
Author(s):  
M. KARL CHINNU ◽  
L. SARAVANAN ◽  
R. JAYAVEL ◽  
C. M. RAGHAVAN ◽  
K. VIJAI ANAND ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Cadmium Acetate ◽  
Cds Nanoparticles ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Hexamethylene Tetramine ◽  
Ft Ir ◽  
Ir Analysis ◽  
Uv Visible

Cadmium sulfide nanoparticles have been synthesized by hydrothermal method using cadmium acetate, thiosemicarbazide, and sodium hydroxide as precursors with hexamethylene tetramine as the surfactant. From the X-ray diffraction analysis, it is observed that synthesized CdS nanoparticles show cubic phase. The presence of HMTA in CdS was confirmed by FT-IR analysis. The bandgap value of CdS nanostructure has been estimated by DRS–UV-Visible spectral analysis. The formation of flower-like nanoclusters was observed using scanning electron microscopy (SEM). The application of CdS nanoparticles in photocatalytic degradation was also studied.

scholarly journals Growth and Characterization of PbTe Thin-film through Solvo Thermal Method

2019 ◽  
pp. 1-5 ◽  
Author(s):  
B. A. Ahuome ◽  
I. Adamu ◽  
M. A. Adamu ◽  
A. N. Baba-Kutigi
Keyword(s):  
Thin Film ◽  
Fill Factor ◽  
Optical Band Gap ◽  
Cadmium Sulphide ◽  
Band Gap Energy ◽  
Thermal Method ◽  
Gravimetric Analysis ◽  
Optical Absorbance ◽  
Internal Parameters

The research considered the Solvo-Thermal method of growing PbTe on non-conducting glass substrate. Cadmium Sulphide thin-film was deposited and used as the n-type absorber layer. On the internal parameters studied, the PbTe nano-film has thickness of  as measured through gravimetric analysis; the optical absorbance studied through the use of UV-750 Series spectrophotometer showed a stable absorbance within the visible wavelength (390 nm – 700 nm) and optical band gap energy of was obtained as extrapolated from the graph of  against . The I-V pattern were measured and plotted. The PbTe grown through this method therefore show a good Fill factor of  

scholarly journals STUDI PENGARUH PERBANDINGAN REAKTAN LIGNIN NaHSO3 DAN pH TERHADAP NATRIUM LIGNOSULFONAT (NaLS)

2015 ◽  
Vol 1 (2) ◽  
pp. 133
Author(s):  
Gustini Syahbirin ◽  
Ani Suryani ◽  
Tesar Dzikrulloh
Keyword(s):  
Functional Group ◽  
Black Liquor ◽  
Sodium Lignosulfonate ◽  
Visible Absorption ◽  
Concrete Admixtures ◽  
Initial Ph ◽  
Soda Pulping ◽  
Uv Visible ◽  
Soda Lignin

 ABSTRACT Lignin was isolated from waste black liquor of soda pulping process. Sulfonation of soda lignin produced Sodium Lignosulfonate (NaLS) which can be used as dispersants, and concrete admixtures. In this research, sulfonation was carried out towards lignin with ratio of lignin-NaHSO3 of 1.0:0.4; 1.0:0.5; and 1.0:0.6, and initial pH of 5.00; 6.00; 7.00. Parameters observed were purity, final pH, and yield of NaLS. The upsurge of initial pH increased the final pH and NaLS yield, but decreased its purity. The upsurge of ratio of lignin-NaHSO3 increased NaLS yield and decreased its purity, but did not affect the final pH of NaLS. The chosen optimum condition was on pH of 6.00 and ratio of lignin-NaHSO3 of 1.0:0.6. Characterization of functional group using FTIR, and purity of NaLS using UV-Visible Absorption Spectrophotometer. Keywords: soda lignin, sulfonation of lignin, sodium lignosulfonate 

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