Synthesis of zinc oxide nanorod through aqueous chemical method for study of its characterization and properties for sensing mechanism of toxic gases

2020 ◽  
Author(s):  
S. Rathinavel ◽  
Dhananjaya Panda
Keyword(s):  
Zinc Oxide ◽  
Chemical Method ◽  
Sensing Mechanism ◽  
Toxic Gases

scholarly journals Sensing mechanism of an optimized room temperature optical hydrogen gas sensor made of zinc oxide thin films

2020 ◽  
Vol 9 (5) ◽  
pp. 10624-10634
Author(s):  
Siti Nor Aliffah Mustaffa ◽  
Nurul Assikin Ariffin ◽  
Ahmed Lateef Khalaf ◽  
Mohd. Hanif Yaacob ◽  
Nizam Tamchek ◽  
...  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Gas Sensor ◽  
Room Temperature ◽  
Hydrogen Gas ◽  
Oxide Thin Films ◽  
Sensing Mechanism

Hydrogen-sensing mechanism of zinc oxide varistor gas sensors

1995 ◽  
Vol 25 (1-3) ◽  
pp. 843-850 ◽  
Author(s):  
Feng-Cang Lin ◽  
Yuji Takao ◽  
Yasuhiro Shimizu ◽  
Makoto Egashira
Keyword(s):  
Zinc Oxide ◽  
Gas Sensors ◽  
Sensing Mechanism ◽  
Hydrogen Sensing ◽  
Zinc Oxide Varistor

Understanding the adsorption behavior of surface active molecules on ZnO nanostructures by experimental and first-principles calculations

2015 ◽  
Vol 17 (45) ◽  
pp. 30450-30460 ◽  
Author(s):  
Baljinder Singh ◽  
Satvinder Singh ◽  
Janpreet Singh ◽  
G. S. S. Saini ◽  
D. S. Mehta ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Sodium Dodecyl Sulphate ◽  
First Principles ◽  
Chemical Method ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Zno Nanostructures ◽  
First Principles Calculations ◽  
Surface Active ◽  
Triton X

Zinc oxide (ZnO) nanostructures with different morphologies are prepared in the presence of surface active molecules such as sodium dodecyl sulphate (SDS), Tween 80 and Triton X-100 by a chemical method.

Synthesis of monocrystalline zinc oxide microrods by wet chemical method for light confinement applications

2012 ◽  
Vol 44 (10) ◽  
pp. 2118-2123 ◽  
Author(s):  
Aparna Thankappan ◽  
Misha Hari ◽  
S. Mathew ◽  
Santhi Ani Joseph ◽  
Erni Rolf ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Light Confinement ◽  
Wet Chemical

The diffusion of aluminium and gallium in zinc oxide

1969 ◽  
Vol 22 (2) ◽  
pp. 325 ◽  
Author(s):  
VJ Norman
Keyword(s):  
Zinc Oxide ◽  
Diffusion Coefficient ◽  
Chemical Method ◽  
Surface Concentration ◽  
Activation Energies ◽  
Temperature Range ◽  
Polycrystalline Zinc ◽  
Substitutional Diffusion ◽  
Oxide Crystals ◽  
Limiting Value

Solubilities and rates of substitutional diffusion of aluminium and gallium in polycrystalline zinc oxide have been determined in the temperature range 750-1000� by a chemical method previously described. The solubility of aluminium in zinc oxide, expressed in ions cm-3, is given by the expression n = 1.0 x 1023exp(-1.08k-1T-1), and the solubility of gallium by n = 2.7 x 1021exp(-0.59k-1T-1), where the activation energies are expressed in eV. The rates of diffusion of both aluminium and gallium were found to be dependent on surface concentration up to a limiting value, at which the diffusion coefficient of aluminium is D = 5.3 x 10-2 exp(-2.74k-1T-1) cm2 sec-1, and that of gallium is D = 3.6 x 104 exp(-3.75k-1T-1) cm2 sac-1. ��� It is shown that supersaturation of both aluminium and gallium in the zinc oxide crystals occurs above 800�.

Using X-Ray Diffraction and Scanning Electron Microscope to Study Zinc Oxide Nanoparticles Prepared by Wet Chemical Method

2013 ◽  
Vol 685 ◽  
pp. 119-122 ◽  
Author(s):  
Tahseen H. Mubarak ◽  
Karim H. Hassan ◽  
Zena Mohammed Ali Abbas
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Zno Nanoparticles ◽  
Chemical Method ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Wet Chemical ◽  
Scanning Electron

The application of nanoparticles in the processes of making commercial products has increased in recent years due to their unique physical and chemical properties. Materials whose crystallites, particle sizes are smaller than 100 nm are commonly named nanocrystalline, nanostructured, nanosized materials. There are many methods used for the preparation of nanomaterials. We use is a method which is easy if compared to other methods with the chemicals required for these methods are available and cheap. Nano zinc oxide has been prepared by wet chemical method from zinc nitrate and using sodium bicarbonate as precipitation agent. The resulting nanopowders were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM).The particle size measurement using XRD Scherer’s formula calculations confirms that the crystallite size of the ZnO nanoparticles range from 41 to 67 nm and depending on calcinations temperature. SEM micrographs reveals less number of pores with smaller lump size in addition to clearly showing the micro structural homogeneity and remarkably dense mode of packing of grains of ZnO nanoparticles with minimum porosity.

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