Synthesis and Characterization of ZnO Nanoparticles

2004 ◽  
Vol 829 ◽  
Author(s):  
I. U. Abhulimen ◽  
X. B. Chen ◽  
J. L. Morrison ◽  
V. K. Rangari ◽  
L. Bergman ◽  
...  
Keyword(s):  
Blue Shift ◽  
Acoustic Cavitation ◽  
Spherical Particles ◽  
Synthesis And Characterization ◽  
Electrical Measurements ◽  
Cavitation Phenomenon ◽  
Transmission Electron ◽  
Significant Blue Shift ◽  
Scanning Electron

ABSTRACTNanoparticles of ZnO were synthesized using a sonochemical technique. Sonochemistry arises from an acoustic cavitation phenomenon, that is, the formation, growth and implosive collapse of bubbles in a liquid medium. The ultraviolet photoluminescence (PL) studies of the samples showed a strong PL intensity and a significant blue shift relative to the PL of the bulk. Shifts up to 70 meV were observed and attributed to a confinement effect. Scanning electron microscopy indicated roughly spherical particles, ∼160 nm in diameter. However, nano-platelets and rods were observed in transmission electron micrographs. Preliminary electrical measurements indicated a highly resistive nature of the nanoparticulate material.

Hydrothermal Synthesis and Characterization of BiFeO3 Polyhedral Crystallites

2012 ◽  
Vol 174-177 ◽  
pp. 508-511
Author(s):  
Lin Lin Yang ◽  
Yong Gang Wang ◽  
Yu Jiang Wang ◽  
Xiao Feng Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

BiFeO3 polyhedrons had been successfully synthesized via a hydrothermal method. The as-prepared products were characterized by power X-ray diffraction (XRD) pattern, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The possible mechanisms for the formation of BiFeO3 polyhedrons were discussed. Though comparison experiments, it was found that the kind of precursor played a key role on the morphology control of BiFeO3 crystals.

Synthesis and characterization of homogeneous lead-substituted tin oxide with the (110) face of rutile structure

2000 ◽  
Vol 15 (10) ◽  
pp. 2076-2079
Author(s):  
Chika Nozaki ◽  
Takashi Yamada ◽  
Kenji Tabata ◽  
Eiji Suzuki
Keyword(s):  
Electron Microscopy ◽  
Tin Oxide ◽  
Photoelectron Spectroscopy ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Rutile Structure ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Synthesis of a rutile-type lead-substituted tin oxide with (110) face was investigated. The characterization was performed by x-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive x-ray spectroscopy, infrared spectroscopy, x-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller surface area measurements. The homogeneous rutile-type lead-substituted tin oxide was obtained until 4.1 mol% of tin was substituted with lead. The surface of obtained oxide had a homogeneously lead-substituted (110) face.

Synthesis and Characterization of Novel AlF3 Cubes

NANO ◽  
2015 ◽  
Vol 10 (05) ◽  
pp. 1550071 ◽  
Author(s):  
Maoquan Xue ◽  
Changsheng Li
Keyword(s):  
Electron Microscopy ◽  
Synthesis And Characterization ◽  
Metal Fluoride ◽  
Controlled Synthesis ◽  
X Ray ◽  
Transmission Electron ◽  
Cubic Structure ◽  
Synthesis Approach ◽  
Scanning Electron

In this paper, regularly shaped AlF 3 particles with cubic structure were successfully synthesized via a solvothermal route. The as-prepared products were characterized by X-ray powder diffraction (XRD), energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The experimental results indicated that reaction temperature and time have significant effects on the morphology of the as-prepared products. A possible formation process has also been investigated on the basis of a series of XRD and SEM studies of the product obtained at different conditions. This well-controlled synthesis approach may be extended to fabricate other metal fluoride materials.

Surfactant-Assisted Synthesis and Characterization of SrCrO4 Nanostructures

2006 ◽  
Vol 6 (3) ◽  
pp. 738-742 ◽  
Author(s):  
Di Chen ◽  
Kaibin Tang ◽  
Shuyuan Zhang ◽  
Huagui Zheng ◽  
Yitai Qian
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Synthesis And Characterization ◽  
Reaction Systems ◽  
X Ray ◽  
Transmission Electron ◽  
High Resolution Tem ◽  
Surfactant Assisted ◽  
Scanning Electron

A simple and efficient microemulsion-based technique, which used the new Tx-100/cyclohexanol/H2O system, was developed to synthesize SrCrO4 nanowire based nanostructures, including nanowire bundles and flower-like structures at different temperature. X-ray powder diffraction (XRD), field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) were used to characterize the products. Studies found that the reaction temperatures and the reaction systems have great influences on the final products. Optical properties studies by UV-Vis spectra and photoluminescence (PL) spectra confirmed that the as-obtained nanowires showed distinct optical activity under UV and visible light irradiation.

Synthesis and Characterization of In-Doped SnO2 (ITO) Nanowires

2007 ◽  
Vol 121-123 ◽  
pp. 209-214 ◽  
Author(s):  
Zai Yin Huang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Large Scale ◽  
Thermal Evaporation ◽  
Critical Factor ◽  
Argon Atmosphere ◽  
Synthesis And Characterization ◽  
Transmission Electron ◽  
Scanning Electron

Large-scale synthesis of In-doped SnO2 (ITO) nanowires was achieved by direct thermal evaporation of a mixture of Sn and In powders at 900°C in an Argon atmosphere. Scanning electron microscopy and transmission electron microscopy observations show that ITO nanowires have diameter ranging from 20 to 100 nm and lengths up to several tens of micrometers. By altered the reaction temperature, we find that the temperature of the reaction is the critical factor for the morphologies and sizes of the ITO nanowires.

Synthesis and Characterization of Nanosized Cu/ZnO Catalyst by Polyol Method

2008 ◽  
Vol 8 (2) ◽  
pp. 874-877 ◽  
Author(s):  
Tuba Gürkaynak Altınçekiç ◽  
Ismail Boz ◽  
Selçuk Aktürk
Keyword(s):  
Electron Microscopy ◽  
Metallic Copper ◽  
Average Crystallite Size ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Nanosized Catalysts ◽  
Scanning Electron

Nanosized catalysts composed of metallic copper supported on zinc oxide have been synthesized by the polyol process. Average crystallite size of copper was between 10 and 45 nm. Cu/ZnO catalyst particles were characterized by various techniques, such as X-ray Powder Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Selected Area Electron Diffraction (SAED), and dynamic light scattering analysis (DLS).

Synthesis of MoO3 Nanostructures by a Solution Method

2012 ◽  
Vol 554-556 ◽  
pp. 494-497
Author(s):  
Kai Du ◽  
Rong Hui Wei ◽  
Ya Nan Bai ◽  
Yadi Gu ◽  
Li Ben Li
Keyword(s):  
Silane Coupling Agent ◽  
Solution Method ◽  
Orthorhombic Phase ◽  
Ammonium Molybdate ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Transmission Electron ◽  
Silane Coupling ◽  
Scanning Electron

Synthesis and characterization of microsheets, microrods, microflowers and microspheres of orthorhombic phase molybdenum oxide (MoO3) were reported. The reaction between ammonium molybdate and hydrochloric acid was used to prepare MoO3microstructures and followed by annealing in air at 400oCfor 2h. The combined techniques of X-ray powder diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM) and Raman spectroscopy were used to investigate the effect of pH and additives on the as-prepared samples. Results indicated that they were of microsize. With alcohol as an additive, the sample was plate-like MoO3at pH=2.5, and it was a mixture of MoO3and MoO3•0.55H2O of irradiative corolla at pH=1. The sample obtained by hydrothermal was MoO3flowers. Meanwhile, when silane coupling agent was introduced as the additive, the sample was MoO3spheres.

Synthesis Aligned ZnS Nanocone and its Photoluminescence

2011 ◽  
Vol 295-297 ◽  
pp. 610-613
Author(s):  
Jiang Feng Gong ◽  
Wei Hua Zhu ◽  
Kai Xiao Zhang ◽  
Ming Yi Liu ◽  
Hai Yan Xie
Keyword(s):  
Electron Microscopy ◽  
Radial Growth ◽  
Room Temperature ◽  
Thermal Evaporation ◽  
Synthesis And Characterization ◽  
The Novel ◽  
Room Temperature Photoluminescence ◽  
Transmission Electron ◽  
Scanning Electron

We report the synthesis and characterization of ZnS nanostructures, which were grown by thermal evaporation of the ZnS powder at high temperature using iron network as the collection substrate. Scanning electron microscopy investigations show that the products present taper-like morphologies. Transmission electron microscopy studies indicate ZnS nanostructures are well crystallized. The formation mechanism of the novel nanostructure is discussed on the basis of the experimental results; The nanostructure is formed due to a fast growth of ZnS nanowire along [0001] and the subsequent “epitaxial” radial growth of the ZnS nanocone along the six (01-10) surfaces around the nanowire. A strong room-temperature photoluminescence in ZnS nanostructures has been demonstrated.

Microwave Assisted Reflux Synthesis and Characterization of Magnetic Fe3O4 Micro Bubbles Embed in Nano Particles

2013 ◽  
Vol 763 ◽  
pp. 12-16
Author(s):  
Saba Jamil ◽  
Xiao Yan Jing ◽  
Jun Wang ◽  
Song Nan Li ◽  
Jing Yuan Liu
Keyword(s):  
Electron Microscopy ◽  
Nano Particles ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted ◽  
Transmission Electron ◽  
Small Nanoparticles ◽  
Scanning Electron

Magnetic Fe3O4 nanobubbles surrounded by nanoparticles are prepared by adopting microwave assisted reflux method. The nanomagnetic particles surrounded by small beads like particles are fabricated by irradiating the prepaperd sample solutions by microwave radiations coupled with reflux method simultaneously at 90°C for 45 mins. The characterization of the prepared Fe3O4 particles are carried out by using x ray diffraction, scanning electron microscopy and transmission electron microscopy. The instrumentations shows the morphology that is thick walled bubble like with approximate diameter of about 300 nm to 400 nm surrounded by small nanoparticles of 5 nm to 30 nm in range. The particles are bubbles like and some broken bubbles showed that these might be hollow from inside.

Synthesis and Characterization of a Novel Netlike Nano-TiO2 with Polylactic Acid (PLA) as Template

2011 ◽  
Vol 233-235 ◽  
pp. 623-626 ◽  
Author(s):  
Ling Xin ◽  
Bo Liu ◽  
Jiu Hong Ai ◽  
Jian Cheng Deng
Keyword(s):  
Methylene Blue ◽  
Electron Microscope ◽  
Methyl Orange ◽  
Scanning Electron Microscope ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Novel netlike nano-TiO2 was successfully prepared using polylatic acid (PLA) as a new template, and in particular, it was recyclable as photocatalyst. The products obtained at various temperatures were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM) and powder X-ray diffraction (XRD). Besides, the products have an excellent photocatalysis to methyl orange (MO) and methylene blue (MB).

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