Effect of Synthesis Temperature on the Morphology of ZnO Nanoparticles Obtained via a Novel Chemical Route

ZnO as a semiconductor is used in many applications such as gas sensor devices, laser and optoelectronic devices, photocatalysts, solar cells, and varistors. The applications and properties of ZnO nanoparticles highly depend on the size and morphology of these particles. In this research ZnO nanoparticles were prepared via chemical bath deposition at various temperatures in order to see the effects of synthesis temperature and also 2- methoxyethanol (2-ME) as a novel solvent on the morphology of obtained nanoparticles. For synthesizing of ZnO nanostructured materials, 2-ME has been highly used in sol-gel process but it is the first time that it is used in the chemical bath deposition process. For this purpose 1 M solutions of zinc acetate dehydrate in 2-ME were prepared and added to the solution of NaOH in the same solvent dropwisely. Monoethanolamine (MEA) was used as surfactant. The synthesis temperatures were 30°C, 60°C and 90°C. After filtering and drying, morphologies of obtained nanoparticles were characterized and compared.

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A novel sol–gel route to synthesize (Sr0.5Ba0.5)Nb2O6 ceramics with enhanced electrocaloric effect

Journal of Advanced Dielectrics ◽

10.1142/s2010135x17500126 ◽

2017 ◽

Vol 07 (02) ◽

pp. 1750012 ◽

Cited By ~ 3

Author(s):

Ting Chen ◽

Shu Ya Wu ◽

Xiao Qiang Liu ◽

Xiang Ming Chen

Keyword(s):

Sol Gel ◽

Synthesis Temperature ◽

Ultrafine Powders ◽

X Ray Diffraction ◽

Electrocaloric Effect ◽

X Ray ◽

Fine Powders ◽

Sol Gel Process ◽

Size And Morphology ◽

Mechanism Of The Reaction

(Sr[Formula: see text]Ba[Formula: see text])Nb2O6 ultra-fine powders were synthesized by a novel sol–gel route, and the mechanism of the reaction was discussed. SrCO3, BaCO3, oxalate niobium and citric acid were used to initiate the sol–gel process, and ethylene glycol (EG) was added to further polymerize the cross-linking structure. The evolution of the (Sr[Formula: see text]Ba[Formula: see text])Nb2O6 phase, the reaction process and the microstructures were investigated by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy, DSC-TG and scanning electron microscopy. The synthesis temperature of the (Sr[Formula: see text]Ba[Formula: see text])Nb2O6 powders reached as low as 1200[Formula: see text]C, and the size and morphology of the powders were controlled by temperature. By adjusting the calcination temperature, we obtained (Sr[Formula: see text]Ba[Formula: see text])Nb2O6 powders with uniform sizes of 20[Formula: see text]nm to 500[Formula: see text]nm. Then, dense (Sr[Formula: see text]Ba[Formula: see text])Nb2O6 ceramics were successfully prepared using these ultrafine powders. Finally, an enhanced electrocaloric effect (ECE) value of 0.35[Formula: see text]C was obtained at 100[Formula: see text]kV/cm.

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Synthesis of ZnO and CuO nanoparticles via Sol gel method and Its Characterization by using XRD and FT-IR Analysis

10.21203/rs.3.rs-1234162/v1 ◽

2022 ◽

Author(s):

Monika Patel ◽

Sunita Mishra ◽

Ruchi Verma ◽

Deep Shikha

Keyword(s):

Particle Size ◽

Zno Nanoparticles ◽

Sol Gel ◽

Broad Band ◽

Zinc Nitrate ◽

Zno Nanoparticle ◽

Absorption Bands ◽

Characteristic Absorption ◽

Sol Gel Process ◽

Ft Ir

Abstract Nanotechnology is a completely unique branch of technology that offers with substances in a very small size between (1-100 nm) with various crystal shapes which include spherical nanoparticles, flower shaped, Nano rods, Nano ribbons, and Nano platelets. Metals have ability to produce large number of oxides. These metal oxides play an major role in many areas of chemistry, physics, material science and food science. In this research, Zinc Oxide (ZnO) and Copper (II) oxide nanoparticles were synthesized via sol-gel process using zinc nitrate and copper (II) nitrate as precursor respectively. The characterization of CuO and ZnO nanoparticles was done by using various techniques. X-ray Diffraction (XRD) indicates the crystallinity and crystal size of CuO and ZnO nanoparticle. Fourier transform infrared spectroscopy (FT-IR) was used to get the infrared spectrum of the sample indicating composition of the sample which contains various functional groups. XRD result shows the particle size of CuO at highest peak 29.40140 was 61.25 nm and the particle size of ZnO at highest peak 36.24760 was 21.82 nm. FT-IR spectra peak at 594.56 cm-1 indicated characteristic absorption bands of ZnO nanoparticles and the broad band peak at 3506.9 cm-1 can be attributed to the characteristic absorption of O-H group. The analysis of FT-IR spectrum of CuO shows peaks at 602.09, 678.39, and 730.19cm−1 which refer to the formation of CuO. A broad absorption peak noticed at 3308.2 cm−1 attributed to O–H stretching of the moisture content.

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Synthesis of ZnO Nanoparticles via Sol-Gel Process Using Triethanolamine as a Novel Surfactant

Diffusion in Solids and Liquids III - Defect and Diffusion Forum ◽

10.4028/3-908451-51-5.626 ◽

2008 ◽

pp. 626-631

Author(s):

Ali Shokuhfar ◽

Javad Samei ◽

A. Esmaielzadeh Kandjani ◽

Mohammad Reza Vaezi

Keyword(s):

Zno Nanoparticles ◽

Sol Gel ◽

Sol Gel Process

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Influence of Li2+ Doping on the Structural and Optical Properties of CaO Synthesized by Sol–Gel Process

Journal of Molecular and Engineering Materials ◽

10.1142/s2251237319500023 ◽

2019 ◽

Vol 07 (01n02) ◽

pp. 1950002

Author(s):

Nadir Lalou ◽

Ahmed Kadari

Keyword(s):

Optical Properties ◽

Band Gap ◽

Sol Gel ◽

Calcium Nitrate ◽

Lithium Nitrate ◽

X Ray Diffraction ◽

Structural And Optical Properties ◽

Sol Gel Process ◽

Ft Ir ◽

First Time

This work proposes the synthesis of nanocrystalline calcium oxide (CaO) pure and doped with different concentrations of lithium (Li[Formula: see text]) ions by sol–gel process. Calcium nitrate (Ca(NO[Formula: see text]4H2O; 99.99%) and lithium nitrate (LiNO3; 99.99%) were used as precursors. The synthesized powders were characterized by several techniques such as: UV-Vis transmission spectroscopy, Fourier Transform Infra-red spectroscopy (FT-IR) and X-ray diffraction (XRD). The main objective of this paper is to study the influence of lithium (Li[Formula: see text] ratio) on the structural and optical properties of synthesized powders. The band gap values decreased with the increasing of Li[Formula: see text] ions in CaO lattice; the slight change in the band gap was directly related to the energy transfer between the CaO excited states and the 2s levels of Li[Formula: see text] ions. The influence of Li[Formula: see text] doping on the physical properties of CaO nanocrystalline will be studied for the first time in this work; no literature has previously published this kind of impurities.

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The crystal structures, morphological, kinetics and photocatalytic activity studies of Al/Ca co-doped ZnO nanoparticles via the sol–gel process

International Journal of Environmental & Analytical Chemistry ◽

10.1080/03067319.2020.1817419 ◽

2020 ◽

pp. 1-15

Author(s):

Reza Mahdavi ◽

S. Siamak Ashraf Talesh

Keyword(s):

Photocatalytic Activity ◽

Crystal Structures ◽

Zno Nanoparticles ◽

Sol Gel ◽

Sol Gel Process ◽

Doped Zno ◽

Co Doped

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Advances in Dye-Doped Sol-Gel Lasers

MRS Proceedings ◽

10.1557/proc-329-267 ◽

1993 ◽

Vol 329 ◽

Cited By ~ 24

Author(s):

B. Dunn ◽

F. Nishida ◽

R. Toda ◽

J. I. Zink ◽

T. H. Allik ◽

...

Keyword(s):

Laser Field ◽

Considerable Increase ◽

Sol Gel ◽

Laser Action ◽

Tunable Laser ◽

Laser Dyes ◽

Dye Molecules ◽

Solution Synthesis ◽

Chemical Route ◽

Sol Gel Process

AbstractThe sol-gel process is a solution synthesis technique which provides a low temperature chemical route for the preparation of rigid transparent matrices. A number of laser dyes have been incorporated in different sol-gel matrices and tunable laser action has been demonstrated with these materials. This paper extends the sol-gel laser field into two significant areas, infrared dyes and pyrromethenes. The work with the tricarbocyanine dyes shows the versatility of sol-gel chemistry as organic modifications produce a favorable environment for the dye molecules. The results with the pyrromethene system show a considerable increase in output energy and offer the promise of longer laser lifetimes.

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Porous graphene to encapsulate Na6.24Fe4.88(P2O7)4 as composite cathode materials for Na-ion batteries

Chemical Communications ◽

10.1039/c5cc04422g ◽

2015 ◽

Vol 51 (66) ◽

pp. 13120-13122 ◽

Cited By ~ 38

Author(s):

Yubin Niu ◽

Maowen Xu ◽

Shu-Juan Bao ◽

Chang Ming Li

Keyword(s):

Cathode Materials ◽

Sol Gel ◽

Composite Cathode ◽

Porous Graphene ◽

Graphene Composite ◽

Sol Gel Process ◽

First Time

Na6.24Fe4.88(P2O7)4@porous graphene composite is fabricated as a cathode of Na-ion batteries for the first time by a hydrothermally assisted sol–gel process.

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Formation of nanoscopic CaF2via a fluorolytic sol–gel process for antireflective coatings

Journal of Materials Chemistry C ◽

10.1039/c4tc02510e ◽

2015 ◽

Vol 3 (8) ◽

pp. 1716-1723 ◽

Cited By ~ 24

Author(s):

Alexander Rehmer ◽

Kerstin Scheurell ◽

Erhard Kemnitz

Keyword(s):

Sol Gel ◽

Nano Particles ◽

Antireflective Coatings ◽

Sol Gel Process ◽

Sol Gel Synthesis ◽

First Time

For the first time transparent antireflective CaF2-coatings were prepared from clear CaF2-sols obtained via the fluorolytic sol–gel synthesis and containing homo-dispersed CaF2 nano-particles.

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Optical properties of ZnO nanoparticles synthesized by varying the sodium hydroxide to zinc acetate molar ratios using a Sol-Gel process

Open Physics ◽

10.2478/s11534-011-0050-3 ◽

2011 ◽

Vol 9 (5) ◽

Cited By ~ 9

Author(s):

Francis Dejene ◽

Abdub Ali ◽

Hendrik Swart ◽

Reinhardt Botha ◽

Kittesa Roro ◽

...

Keyword(s):

Zno Nanoparticles ◽

Sol Gel ◽

Visible Region ◽

Blue Emission ◽

Molar Ratio ◽

Broad Emission Band ◽

Photoluminescence Intensity ◽

Molar Ratios ◽

Quantum Confinement Effects ◽

Sol Gel Process

AbstractMaterial property dependence on the OH−/Zn2+ molar ratio of the precursor was investigated by varying the amount of NaOH during synthesis of ZnO. It was necessary to control the water content and temperature of the mixture to ensure the reproducibility. It was observed that the structural properties, particle size, photoluminescence intensity and wavelength of maximum intensity were influenced by the molar ratio of the precursor. The XRD spectra for ZnO nanoparticles show the entire peaks corresponding to the various planes of wurtzite ZnO, indicating a single phase. UV measurements show the absorption that comes from the ZnO nanoparticles in visible region. The absorption edge of these ZnO nanoparticles are shifted to higher energies and the determined band gap energies are blue shifted as the OH−/Zn2 molar ration increases, due to the quantum confinement effects. The photoluminescence characterization of the ZnO nanostructures exhibited a broad emission band centred at green (600 nm) region for all molar ratios except for OH−/Zn2+ = 1.7 where a second blue emission around 468 nm was also observed. The photoluminescence properties of ZnO nanoparticles were largely determined by the size and surface properties of the nanoparticles.

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