scholarly journals A novel technique to synthesis of tenorite (CuO) nanoparticles from low concentration CuSO4 solution

2011 ◽  
Vol 47 (1) ◽  
pp. 73-78 ◽  
Author(s):  
E. Darezereshki ◽  
F. Bakhtiari
Keyword(s):  
Electron Microscopy ◽  
Decomposition Method ◽  
Raw Materials ◽  
Spherical Shape ◽  
Cuo Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermal Decomposition Method ◽  
Novel Technique ◽  
Transmission Electron

In this study CuO nanoparticles were prepared via direct thermal decomposition method using basic copper sulphates as wet chemically synthesized precursor which was calcined in air at 750?C for 2h. Samples were characterized by thermogravimetric (TG-DSC), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), infrared spectrum (IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The XRD, EDS, and IR results indicated that the synthesized CuO particles were pure. The SEM and TEM results showed that the CuO nanoparticles were of approximate spherical shape, and 170?5 nm in size. Using this method, Cuo nanoparticles could be produced without using organic solvent, expensive raw materials, and complicated equipment.

scholarly journals ZnO Nanocrystals as Anode Electrodes for Lithium-Ion Batteries

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Wenhui Zhang ◽  
Lijuan Du ◽  
Zongren Chen ◽  
Juan Hong ◽  
Lu Yue
Keyword(s):  
Electron Microscopy ◽  
Decomposition Method ◽  
Storage Capacity ◽  
Lithium Ion ◽  
X Ray Diffraction ◽  
Lithium Storage ◽  
X Ray ◽  
Thermal Decomposition Method ◽  
Zno Nanocrystals ◽  
Transmission Electron

ZnO nanocrystals were synthesized via a thermal decomposition method. X-ray diffraction, transmission electron microscopy, and photoluminescence were used to investigate the composition and nanostructure of the material. Compared with commercial ZnO nanoparticles, ZnO nanocrystals showed higher lithium storage capacity and better cycling characteristics and exhibited a reversible discharge capacity of 500 mAh g−1after 100 cycles at 200 mA g−1.

Controlled Synthesis of BaF2 Nanorods via Hydrothermal Microemulsion Method

2007 ◽  
Vol 121-123 ◽  
pp. 441-444
Author(s):  
Y.C. Chen ◽  
Y.G. Zhang
Keyword(s):  
Electron Microscopy ◽  
Raw Materials ◽  
Barium Chloride ◽  
Building Blocks ◽  
Controlled Synthesis ◽  
X Ray Diffraction ◽  
Microemulsion Method ◽  
X Ray ◽  
Transmission Electron ◽  
Microemulsion Droplet

BaF2 nanorods were synthesized by hydrothermal microemulsion method using sodium fluoride (NaF) and barium chloride (BaCl2) as the raw materials. The as-prepared products were characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The results showed that the products were composed of BaF2 nanorods with diameters of 18-62 nm and lengths up to 1μm. A directed aggregation growth process mediated by the microemulsion droplet building blocks is proposed for the formation of BaF2 nanorods. Further work is in progress to evaluate the possibility of synthesizing other fluoride 1D nanostructures using a similar method.

scholarly journals Preparation and Characterization of Ni(OH)2and NiO Mesoporous Nanosheets

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Changyu Li ◽  
Shouxin Liu
Keyword(s):  
Decomposition Method ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
Facile Hydrothermal Method ◽  
Sodium Dodecylbenzenesulfonate ◽  
Single Crystalline ◽  
X Ray ◽  
Thermal Decomposition Method ◽  
Transmission Electron

Mesoporous nanosheets of single-crystallineβ-nickel hydroxide (β-Ni(OH)2) were successfully synthesized via a facile hydrothermal method using Ni(NO3)2 · 6H2O as precursor in a mixed solution of sodium hydroxide (NaOH) and sodium dodecylbenzenesulfonate (SDBS). Single-crystalline nickel oxide (NiO) mesoporous nanosheets can be obtained through a thermal decomposition method usingβ-Ni(OH)2mesoporous nanosheets as precursor. The influences of SDBS and hydrothermal treatment were carefully investigated; the results showed that they played important roles in the formation ofβ-Ni(OH)2mesoporous nanosheets. The as-obtainedβ-Ni(OH)2and NiO were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal gravity-differential thermal analysis (TG-DTA), and specific surface area, and pore size test.

HYDROTHERMAL SYNTHESIS OF POTASSIUM BISMUTH TITANATE NANOPARTICLES

2006 ◽  
Vol 05 (04n05) ◽  
pp. 663-669 ◽  
Author(s):  
GANGQIANG ZHU ◽  
HONGYAN MIAO ◽  
GUOQIANG TAN ◽  
YUN LIU ◽  
AO XIA
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Particle Size ◽  
Phase Composition ◽  
Bismuth Titanate ◽  
Raw Materials ◽  
Phase Particle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

Potassium bismuth titanate nanoparticles were prepared by the hydrothermal method using Ti ( C 4 H 9 O )4 and Bi ( NO 3)3·5 H 2 O as raw materials in alkaline solution at temperatures of 160–200°C. The crystal phase, particle size, morphology and dispersion of the particles were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the particles with sizes of about 50–100 nm in diameter are well-dispersed K 0.5 Bi 0.5 TiO 3 (KBT) crystals of tetragonal structure, and the alkaline concentration and the temperature of solutions have great effects on the phase composition and morphology of the resultant particles. We could gain the KBT phase of high purity when the concentration of KOH is about 8–12 M and the reaction temperature is about 170–180°C.

Characterization of Nanostructured Nickel Aluminate Formation during Mechano-Chemical Recycling of Spent NiO/Al2O3 Catalyst

2011 ◽  
Vol 364 ◽  
pp. 186-190
Author(s):  
Karim Nazemi Mohammad ◽  
Saeed Sheibani ◽  
Fereshteh Rashchi ◽  
Victor Gonzalez De La Cruz ◽  
Alfonso Caballero Martínez
Keyword(s):  
Electron Microscopy ◽  
Size Range ◽  
Spherical Shape ◽  
Research Use ◽  
Chemical Recycling ◽  
X Ray Diffraction ◽  
Nickel Aluminate ◽  
X Ray ◽  
Transmission Electron

In this research, use of mechanical alloying method, as a new and effective route for the recycling of spent NiO/Al2O3catalyst to nanostructured nickel aluminate spinel was investigated. Samples were characterized using different techniques such as X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). It was found that the formation of NiAl2O4was started between 15 to 20 hours of milling and completed after 60 hours. The final particles had relatively spherical shape with the size range of 5-50 nm.

Synthesis and Characterization of Graphene/Cu2SnS3 Quantum Dots Composites

2012 ◽  
Vol 624 ◽  
pp. 59-62 ◽  
Author(s):  
Cai Xia Li ◽  
Jun Guo ◽  
Danyu Jiang ◽  
Qiang Li
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Quantum Dots ◽  
Raw Materials ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Phase Structures ◽  
Transmission Electron

In this paper, employing Cu(AC)2•H2O, SnCl2•2H2O and thiourea as raw materials, the composites of graphene/Cu2SnS3 quantum dots (QDs) were prepared simply and quickly using the hydrothermal method. Meanwhile, the separate Cu2SnS3 QDs were also synthesized in the same way. The as-obtained Cu2SnS3 QDs and composites’ phase structures were analyzed and characterized by powder X-ray diffraction (XRD), and the results indicated that the size of the Cu2SnS3 QDs in the composites were less than that of the separate Cu2SnS3 QDs. At the same time, their morphologies were also observed and cross-confirmed by Transmission Electron Microscopy (TEM), and the measurements manifested that Cu2SnS3 QDs were uniformly dispersed on the surface of the graphene, while the separate Cu2SnS3 QDs have obvious glomeration. In addition to this, elemental analysis was also made to verify the existence of Cu2SnS3 on the surface of graphene.

Green synthesis of nanocrystalline α-Al2O3 powders by both wet-chemical and mechanochemical methods

2018 ◽  
Vol 32 (08) ◽  
pp. 1850109 ◽  
Author(s):  
Huiying Gao ◽  
Zhiyong Li ◽  
Peng Zhao
Keyword(s):  
Electron Microscopy ◽  
Raw Materials ◽  
Environmentally Benign ◽  
X Ray Diffraction ◽  
Mechanochemical Method ◽  
X Ray ◽  
Transmission Electron ◽  
Carbonate Hydroxide ◽  
Wet Chemical ◽  
Α Al2o3

Nanosized [Formula: see text]-Al2O3 powders were prepared with AlCl[Formula: see text]6H2O and NH4HCO3 as raw materials by both wet-chemical and mechanochemical methods, through the synthesis of the ammonium aluminum carbonate hydroxide (AACH) precursor followed by calcination. The environmentally benign starch was used as an effective dispersant during the preparation of nanocrystalline [Formula: see text]-Al2O3 powders. X-ray diffraction (XRD), thermogravimetric differential thermal analysis (TG-DTA), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were employed to characterize the precursor AACH and products. The results show that nanosized spherical [Formula: see text]-Al2O3 powders without hard agglomeration and with particle size in the range of 20–40 nm can be obtained by the two methods. Comparing the two “green” processes, the mechanochemical method has better prospects for commercial production.

scholarly journals Synthesis of Transition Metal Dichalcogenides based hybrid nanostructures by thermal decomposition method

2021 ◽  
Vol 2070 (1) ◽  
pp. 012095
Author(s):  
Melbin Baby ◽  
K. Rajeev Kumar
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Decomposition Method ◽  
Transition Metal Dichalcogenides ◽  
Hybrid Nanostructures ◽  
Hybrid Nanostructure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermal Decomposition Method ◽  
Metal Dichalcogenides

Abstract In this work, we report synthesis of hybrid nanostructures of Transition Metal Dichalcogenides via thermal decomposition method. Ammonium tetrathiomolybdate was used as not only growth templates but also as starting precursor for synthesis of hybrid nanostructures. The conditions for the synthesizing method were optimized using electron microscopy and x-ray diffraction. In this hybrid nanostructure synthesis, it was found that MoO3 nanorods are interspersed on exfoliated MoS2 nanosheets. The structural and optical properties of the hybrid nanostructure were investigated using transmission electron microscopy (TEM), Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and Ultraviolet Visible spectrophotometry (UV-VIS). The hybrid nanostructure of MoO3 on MoS2 shows a band gap of 2.2 eV. It was also found that by tuning the preparation parameters viz temperature of heating and time of heating, the composition of the hybrid nanostructure can be varied.

scholarly journals Synthesis of Thermally Spherical CuO Nanoparticles

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Nittaya Tamaekong ◽  
Chaikarn Liewhiran ◽  
Sukon Phanichphant
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Nitrogen Adsorption ◽  
Average Diameter ◽  
Cuo Nanoparticles ◽  
Thermal Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Copper oxide (CuO) nanoparticles were successfully synthesized by a thermal method. The CuO nanoparticles were further characterized by thermogravimetric analysis (TGA), differential thermal analysis (DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), and high resolution transmission electron microscopy (HRTEM), respectively. The specific surface area (SSABET) of CuO nanoparticles was determined by nitrogen adsorption. TheSSABETwas found to be 99.67 m2/g (dBETof 9.5 nm). The average diameter of the spherical CuO nanoparticles was approximately 6–9 nm.

scholarly journals Morphology control of MnO2 nanoparticles: Effect of P123 polymer in ethanol-water system

2017 ◽  
Vol 23 (2) ◽  
pp. 245-249 ◽  
Author(s):  
Li Chen ◽  
Guoyan Luan
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Raw Materials ◽  
Water System ◽  
The Novel ◽  
X Ray Diffraction ◽  
Controllable Synthesis ◽  
X Ray ◽  
Transmission Electron ◽  
Mno2 Nanoparticles

A series of MnO2 nanoparticles were synthesized by two-step reaction in the ethanol-water system with urea as reducing agent. During the novel routine, P123 polymer plays a crucial role in controlling the morphology. Then, characterization and systematic investigations of the samples by transmission electron microscopy and scanning electron microscopy confirmed that the morphology of MnO2 nanoparticles changed as the raw materials ratio changed. Finally, X-ray diffraction and X-ray photoelectron spectroscopy were employed to confirm the crystal structure and the exact components. These results indicated the particles showed a rod-like shape without P123 and changed into sheet-like shape after the addition of P123. Therefore, this idea could be developed for the controllable synthesis of other metal oxide-based nanomaterials.

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