scholarly journals A Strains Activity of CuO Nanoparticles using Copper Chloride Dihydrate by Sol-Gel Method

2019 ◽  
Vol 31 (4) ◽  
pp. 886-890
Author(s):  
B. Arunkumar ◽  
S. Johnson Jeyakumar ◽  
M. Jothibas
Keyword(s):  
Copper Chloride ◽  
Sol Gel ◽  
Broad Band ◽  
Blue Shift ◽  
Cuo Nanoparticles ◽  
Average Crystalline Size ◽  
Chloride Dihydrate ◽  
Sem Image ◽  
Cost Efficient ◽  
Intense Broad Band

Copper(II) oxide (CuO) nanoparticles synthesized by different molarities like 0.1, 0.2 and 0.3 M at calcinations temperature 450 ºC. The XRD results analyzed the prominent peaks corresponding to the monocrystalline nature of CuO nanoparticles and the average crystalline size of CuO nanoparticles size is decreased with increase of molarities. From SEM image of CuO nanoparticles, the particles are well scattered, which are well connected and consistent with the crystal system. The absorption spectra shows the blue shift which can be attributed to the small size of CuO nanostructures. The FTIR spectra confirmed high intense broad band peaks at 496.96 cm-1 and assigned to characteristics band of monoclinic phase CuO nanoparticles were synthesized and calcined at 450 ºC, and the particle size of the nanoparticles was found to be in the range of 19-23 nm. These sizes of integrated CuO nanoparticles is a cost-efficient, biological molecule capable of working with antibiotics against Staphylococcus saprophyticus, Bacillus subtilis, Pseudomonas aeruginosa and Escherichia coli.

Preparation and Stability Characterization of Copper Oxide Nanofluid by Two Step Method

2015 ◽  
Vol 832 ◽  
pp. 139-143 ◽  
Author(s):  
A.L. Subramaniyan ◽  
Arun Kumar ◽  
Sethupathi ◽  
T. Sorna Kumar ◽  
R. Ilangovan
Keyword(s):  
Particle Size ◽  
Copper Oxide ◽  
Copper Chloride ◽  
Sol Gel ◽  
Cuo Nanoparticles ◽  
Step Method ◽  
Sem Image ◽  
Particle Size Analyzer ◽  
Negative Zeta Potential

Copper oxide (CuO) nanofluids are prepared by two step method. CuO nanoparticles are prepared by sol gel method with Copper chloride as precursor and NaOH as a reducing agent. The prepared CuO nanoparticles are characterized by XRD, SEM and Particle size analyzer. XRD measurements reveal a grain size of 72nm .SEM image reveals an inhomogenous mixture of particles from 500 nm to 3500 nm with irregular morphology and few traces of CuO cones.. The particle size distribution of CuO particles is in the range of 1000-1600nm which is in accordance with the SEM results.CuO –Ethylene Glycol nanofluids are prepared by two step method by ultrasonication of obtained CuO particles.The stability of CuO nanofluid is given with a negative zeta potential of-22.5 mv.

Preparation and Characterization of CuO Nanoparticles Prepared by Chemical Method

2021 ◽  
Vol 1021 ◽  
pp. 68-77
Author(s):  
Rashed T. Rasheed ◽  
Liblab S. Jassim ◽  
Hamsa A. Easa ◽  
Shaymaa H. Khazaal
Keyword(s):  
Annealing Temperature ◽  
Energy Gap ◽  
Copper Chloride ◽  
Sol Gel ◽  
Ammonium Hydroxide ◽  
Cuo Nanoparticles ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Different Temperatures

Copper oxide (CuO) nanoparticles were prepared by the sol-gel method, by the reaction of copper chloride and ammonium hydroxide as procurers. Nanopowders are annealing at different temperatures (100 °C, 200 °C, and 600 °C) for 120 min and confirmed the monoclinic phase by X-ray diffraction analysis of the metal oxide with lattice parameters a = 4.694 Å, b = 3.456 Å and c = 5.165Å for annealing temperature 400°C. Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), and UV-Visible Spectroscopy spectrum was used to determine the structure, average crystallize, and morphology. We found increasing in size and energy gap (Eg) from (62.95 nm to 106.84 nm) and from (1.72 eV to 1.49 eV), when annealing temperature increasing from 200 °C to 600 °C, respectively.

scholarly journals Synthesis and Characterization of Ce-Doped Y3Al5O12(YAG:Ce) Nanopowders Used for Solid-State Lighting

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Do Ngoc Chung ◽  
Do Ngoc Hieu ◽  
Tran Thi Thao ◽  
Vo-Van Truong ◽  
Nguyen Nang Dinh
Keyword(s):  
Solid State ◽  
Sol Gel ◽  
Broad Band ◽  
Blue Shift ◽  
Combustion Method ◽  
Inorganic Nanoparticles ◽  
Solid State Lighting ◽  
Low Temperature Combustion ◽  
Photoluminescence Spectra ◽  
Temperature Combustion

Nano-Ce-doped Y3Al5O12(YAG:Ce) powders were synthesized by using a sol-gel low temperature combustion method, followed by thermal annealing. The annealing temperature for enriching nanoparticles was optimized and found to be 1000°C. The process for enriching uniform nanoparticles of YAG:Ce powder was carried out by using the nanosteam technique (NST). The nanoparticles obtained from this NST treatment had a size in the range of 9–20 nm. Measurements of the photoluminescence spectra of the dispersed YAG:Ce nanoparticles solutions showed a blue shift in the photoemission with a value of ca. 10 nm in the green region. WLEDs made from the blue LED chip coated with the nano-YAG:Ce + MEH-PPV composite epoxy exhibit white light with a broad band luminescent spectrum and a high color rending index (CRI). The photoluminescence spectra of the YAG:Ce nanoparticles showed a potential application of the prepared nanostructured YAG:Ce phosphor not only in energy-efficient solid-state lighting, but also in optoelectronic devices, including organic composite solar cells. In addition, it is suggested that NST can be applied for the enrichment of uniform inorganic nanoparticles.

Exploring the characteristics of the nickel oxide nanoparticles via Sol - gel method

2020 ◽  
Vol 3 (3) ◽  
Author(s):  
Jothi M ◽  
Sowmiya K
Keyword(s):  
Nickel Oxide ◽  
Ph Value ◽  
Lattice Structure ◽  
Sol Gel ◽  
Systematic Change ◽  
Average Crystalline Size ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
X Ray ◽  
Vis Spectroscopy

Nickel Oxide (NiO) is an important transition metal oxide with cubic lattice structure. NiO is thermally stable that is suitable for tremendous applications in the field of optic, ceramic,glass, electro-chromic coatings, plastics, textiles, nanowires, nanofibers, electronics,energy technology, bio-medicine, magnetism and so on. In this present study, NiO nanoparticles were successfully synthesized by sol-gel technique. Nano-sols were prepared by dissolving Nickel-Chloride [NiCl2.6H2O] in NaOH solvent and were converted into nano structured gel on precipitation. A systematic change in preparation parameters like calcination temperature, time, pH value has been noticed in order to predict the influence on crystallite size. Then the prepared samples were characterized by the X-ray Diffraction Spectroscopic (XRD), UV-VIS Spectroscopy, Fourier Transform Infra-Red Spectroscopy (FTIR), Energy Dispersive X-ray Spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Particle Size Analyzer (PSA). From XRD, the average crystalline-size has been calculated by Debye-Scherrer Equation and it was found to be 12.17 nm and the band gap energy of Nickel oxide (NiO) from UV studies reveals around 3.85 eV. Further, EDX and FTIR studies, confirm the presences of NiO nanoparticles. The SEM study exhibits the spherical like morphology of Nickel oxide (NiO). Further from PSA, the mean value of NiO nanoparticles has been determined.

scholarly journals Resistance to Growth of Molds for Wood Modified with Hydrophobic Hybrid Silica Gel Containing Copper Amine Complexes

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 577
Author(s):  
Shaokun Hao ◽  
Chuanshuang Hu ◽  
Xiuyi Lin ◽  
Jin Gu ◽  
Hong Yun ◽  
...  
Keyword(s):  
Silica Gel ◽  
High Efficiency ◽  
Copper Chloride ◽  
Sol Gel ◽  
Untreated Wood ◽  
Populus Tomentosa ◽  
Amine Complexes ◽  
Hybrid Silica ◽  
Sol Gel Process ◽  
Copper Amine

Complexation copper with amine provides an effective strategy for fixation copper in wood, while hydrophobic modification improves the dimensional stability of wood. Thus, a combination of complexation and hydrophobization is expected to enhance the efficiency of copper-based biocides. In this study, hydrophobic hybrid silica gel containing copper amine complexes (MACu) was prepared through an in situ sol-gel process in wood using methyltriethoxysilane (MTES), 3-amino-propyltriethoxysilane (APTES), and copper chloride. The resistance to growth of molds for MACu modified wood (Populus tomentosa) was measured according to ASTM D3273-16. A leaching resistance test was carried out in accordance with AWPA E11-16. The results showed that only Aspergillus niger covered the surface of untreated wood blocks and no mold grew on the MACu surface even after the leaching test. MACu xerogel and MACu wood were further characterized by SEM-EDS, FTIR, and XPS. A possible schematic diagram of the reaction mechanism was proposed to explain the high-efficiency anti-mold performance of MACu wood.

Effect of aging heat time and annealing temperature on the properties of nanocrystalline tin dioxide thin films

2017 ◽  
Vol 31 (12) ◽  
pp. 1750114
Author(s):  
Imad H. Kadhim ◽  
H. Abu Hassan
Keyword(s):  
Thin Films ◽  
Tin Dioxide ◽  
Sol Gel ◽  
Stable Solution ◽  
Solution Viscosity ◽  
Pure Ethanol ◽  
Rutile Structure ◽  
Heat Time ◽  
Chloride Dihydrate ◽  
P Type

Nanocrystalline tin dioxide (SnO2) thin films have been successfully prepared by sol–gel spin-coating technique on p-type Si (100) substrates. A stable solution was prepared by mixing tin(II) chloride dihydrate, pure ethanol, and glycerin. Temperature affects the properties of SnO2 thin films, particularly the crystallite size where the crystallization of SnO2 with tetragonal rutile structure is achieved when thin films that prepared under different aging heat times are annealed at 400[Formula: see text]C. By increasing aging heat time in the presence of annealing temperatures the FESEM images indicated that the thickness of the fabricated film was directly proportional to solution viscosity, increasing from approximately 380 nm to 744 nm, as well as the crystallization of the thin films improved and reduced defects.

Synergistic Effect of Eu3+ and Sm3+ Co-Doping on Photocatalytic Activity of TiO2 Nanoparticles

2011 ◽  
Vol 197-198 ◽  
pp. 891-894 ◽  
Author(s):  
Cheng Zhi Jiang ◽  
Xu Dong Lu
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Sol Gel ◽  
Blue Shift ◽  
Nano Particles ◽  
Absorption Profile ◽  
Co Doping ◽  
The Matrix ◽  
Co Doped ◽  
The Eu

Pure TiO2, Eu3+and Sm3+co-doping TiO2composite nanoparticles have been prepared by sol-gel method and characterized by the techniques such as XRD, SEM and DRS. The photocatalytic degradation of methylene blue (MB) in aqueous solution was used as a probe reaction to evaluate their photocatalytic activity. The matrix distortion of TiO2nano-particles increases after co-doping of Eu3+and Sm3+and a blue-shift of the absorption profile are clearly observed. The results show that co-doping of Eu3+and Sm3+inhibits the phase transformation of TiO2from anatase to rutile, decreases the diameter of TiO2nano-particles and significantly enhance the photocatalytic activity of TiO2. The Eu3+and Sm3+co-doped into TiO2nano-particles exert a synergistic effect on their photocatalytic activity.

Development of temporal spectroscopic properties for Xerogel matrices doped with Rhodamine 6G dye

Open Physics ◽  
2006 ◽  
Vol 4 (3) ◽  
Author(s):  
Abbas Al-Wattar ◽  
Baha Chiad ◽  
Wesam Twej ◽  
Sarmed Al-Awadi
Keyword(s):  
Fluorescence Spectra ◽  
Rhodamine 6G ◽  
Sol Gel ◽  
Blue Shift ◽  
Spectroscopic Properties ◽  
Dye Molecules ◽  
Absorption And Fluorescence Spectra ◽  
Silica Network ◽  
Sol Gel Process ◽  
Two Parameters

AbstractThe solid host of a laser dye modifies its spectroscopic properties with respect to its liquid host. During the Sol-Gel process the dye molecules suffer from changing their environment. Two parameters affect this matter, the change in the concentration due to the evaporation of the solvent (drying) and the caging of dye molecules inside the pores or attachment to the silica network. Rhodamine 6G absorption and fluorescence spectra with different concentrations, during Sol-Gel time processing, have been studied. Both, absorption and fluorescence spectra of the dye in the solid host, for different concentrations, show a blue-shift relative to its liquid phase.

La-Doped Nanometer TiO2 Powders Prepared by Sol-Gel Method

2016 ◽  
Vol 697 ◽  
pp. 97-100
Author(s):  
Zhi Cao Duan ◽  
Gui Min Jiang ◽  
Xue Quan Rong ◽  
Ji Kang Yan ◽  
Jing Hong Du ◽  
...  
Keyword(s):  
Sol Gel ◽  
Blue Shift ◽  
Phase Transformation Temperature ◽  
Second Phase ◽  
Temperature Phase ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Doped Titania ◽  
La Doped

La-doped Titania powders were synthesized by sol-gel method. The influence of dopant on the phase transformation temperature, Phase compositions, chemical states, microstructures and the visible light absorbable range of titania were investigated, which were characterized by X-ray diffractometer (XRD), transmission electron microscopy (TEM), energy dispersion X-ray spectrum in scanning transmission electronic microscope (STEM-EDS) and UV-Vis spectrophotometer (UV-Vis). The results show that the dopant of La3+ significantly inhibited the phase transition and grain growth of TiO2.With the increasing of calcination temperature, the grain orientation of TiO2 are from clutter into order and the light absorption band edge of TiO2 are blue shift. La3+-doped titania precipitate La4Ti19O24 and the second phase precipitated on the surface of TiO2 with irregular spherical.

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