Annealing Effect on the Surface Morphology and Photoluminescence Properties of ZnO Hexagonal Rods by Immersion Method

2012 ◽  
Vol 576 ◽  
pp. 353-356 ◽  
Author(s):  
Ab Aziz Azlinda ◽  
Zuraida Khusaimi ◽  
Fadzilah Suhaimi Husairi ◽  
Nor Iyazi Nasruddin ◽  
S. Abdullah ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Room Temperature ◽  
Annealing Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Photoluminescence Properties ◽  
Immersion Method ◽  
Oxide Nanostructures ◽  
Hexagonal Shape ◽  
Metal Oxide Nanostructures

ZnO hexagonal rod structure were prepared by immersion method deposited onto Si (Si/ZnO) and gold-seeded Si substrate (ZnO/Au/Si). The annealing temperatures were varied from 400, 500 and 600 °C. The effect of annealing temperature on the surface morphology and photoluminescence characteristics was investigated. The samples were characterized by Field Emission Scanning Electron Microscope (FESEM) to study their morphology and structural properties while the optical properties were characterized at room temperature using Photoluminescence Spectroscopy. The shape of ZnO showed growth of rods with hexagonal shape. As the annealing temperature increased, the morphology study indicates that diameter size of ZnO decreased while the crystallinity increases. The structures has high surface area, is a potential metal oxide nanostructures to be develop for optoelectronic devices and chemical sensors.

Annealing Effect on the Surface Morphology and Photoluminescence Properties of ZnO Nanorod Prepared by Catalytic-Immersion Method Grown on Si and Au/Si Substrate

2013 ◽  
Vol 667 ◽  
pp. 110-114
Author(s):  
Azlinda Ab Aziz ◽  
Zuraida Khusaimi ◽  
Saifollah Abdullah ◽  
Mohamad Rusop Mahmood
Keyword(s):  
Surface Morphology ◽  
Annealing Temperature ◽  
High Surface ◽  
Zno Nanorods ◽  
High Surface Area ◽  
Si Substrate ◽  
Immersion Method ◽  
Oxide Nanostructures ◽  
Hexagonal Shape ◽  
Metal Oxide Nanostructures

ZnO nanorods were prepared by immersion method deposited onto Silicon (Si) and gold-seeded Si (Au/Si) substrate. The annealing temperatures were varied from 400, 500 and 600 °C. The effect of annealing temperature on the surface morphology and photoluminescence characteristics was investigated. The samples were characterized by Field Emission Scanning Electron Microscope (FESEM) to study their morphology and structural properties while the optical properties were characterized at room temperature using Photoluminescence Spectroscope. The shape of ZnO showed growth of nanorods with hexagonal shape. As the annealing temperature increased, the morphology study indicates that particle size of ZnO decreased while the crystallinity increases. The structures has high surface area, is a potential metal oxide nanostructures to be develop for optoelectronic devices and chemical sensors.

Influence of Substrate’s Alignment Strategy to the Growth of ZnO Nano-Petals via Solution-Immersion Method

2012 ◽  
Vol 620 ◽  
pp. 60-65
Author(s):  
Azlinda Ab Aziz ◽  
Zuraida Khusaimi ◽  
Mohamad Rusop
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Zinc Nitrate ◽  
Nitrate Hexahydrate ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Immersion Method ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Alignment Strategy

Zinc oxide (ZnO) nanostructures were successfully grown on gold-seeded Si substrate prepared by a solution-immersion method using a novel mixture of an aqueous solution of Zinc nitrate hexahydrate (Zn (NO3)2.6H2O) with a non-toxic, odourless urea (CH4N2O) as a stabilizer. Structural and optical properties of resultant ZnO thin films were investigated by X-Ray Diffraction, FESEM and Photoluminescence Spectroscopy (PL). Clusters of ZnO micro-flower with serrated broad petals with the thickness of petals approximately 60 nm were interestingly formed on the film with horizontal manner of alignment during immersion process. The smallest grain size (29 nm) along (100) orientation was achieve with the alignment of substrate tilt towards 60°. The petals structure has high surface area, is a potential metal oxide nanostructures to be develop for optoelectronic devices and chemical sensors.

Characterization of Urea versus HMTA in the Preparation of Zinc Oxide Nanostructures by Solution-Immersion Method Grown on Gold-Seeded Silicon Substrate

2011 ◽  
Vol 364 ◽  
pp. 45-49 ◽  
Author(s):  
Azlinda Ab Azlinda ◽  
Zuraida Khusaimi ◽  
Saifollah Abdullah ◽  
Mohamad Rusop
Keyword(s):  
Zinc Oxide ◽  
Silicon Substrate ◽  
High Surface ◽  
High Surface Area ◽  
Zinc Nitrate ◽  
Nitrate Hexahydrate ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Immersion Method ◽  
Oxide Nanostructures

Zinc oxide (ZnO) nanostructures prepared by immersion method were successfully grown on gold-seeded silicon substrate using Zinc nitrate hexahydrate (Zn (NO3)2.6H2O) as a precursor, separately stabilized with non-toxic urea (CH4N2O) and hexamethylene tetraamine (HMTA). The effect of changing the stabilizer of ZnO solution on the crystal structure, morphology and photoluminescence properties of the resultant ZnO is investigated. X-ray diffraction of the synthesized ZnO shows hexagonal zincite structure. The morphology of the ZnO was characterized using Field Emission Scanning Electron Microscope (FESEM). The growth of ZnO using urea as stabilizer shows clusters of ZnO nanoflower with serrated broad petals were interestingly formed. ZnO in HMTA showed growth of nanorods. The structures has high surface area, is a potential metal oxide nanostructures to be develop for optoelectronic devices and chemical sensors. The formation of ZnO nanostructures is found to be significantly affected by the stabilizer.

scholarly journals The synthesis of a BiOClxBr1−x nanostructure photocatalyst with high surface area for the enhanced visible-light photocatalytic reduction of Cr(vi)

RSC Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 4763-4771 ◽  
Author(s):  
Muhammad Bilal Hussain ◽  
Malik Saddam Khan ◽  
Herman Maloko Loussala ◽  
Muhammad Sohail Bashir
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Photocatalytic Reduction ◽  
Synthetic Process ◽  
Visible Light Photocatalytic

Cr(vi) reduction is performed by BiOCl0.8Br0.2 composite produced via a facile in situ synthetic process at room temperature while making use of PVP (Mw = 10 000).

GROWTH, MORPHOLOGY, INTERFACIAL EFFECTS AND CATALYTIC PROPERTIES OF Au ON TiO2

2001 ◽  
Vol 08 (01n02) ◽  
pp. 73-93 ◽  
Author(s):  
F. COSANDEY ◽  
T. E. MADEY
Keyword(s):  
Surface Science ◽  
Ultrathin Films ◽  
Room Temperature ◽  
Catalytic Properties ◽  
High Surface ◽  
High Surface Area ◽  
Model System ◽  
Growth Morphology ◽  
Oxide Substrate ◽  
Planar Films

We survey recent studies and present new data on the growth, interactions, structure and chemistry of gold deposited on TiO 2(110) surfaces. The noble metal Au on TiO 2(110) is a model system for weak interaction of a metal with an oxide substrate; it is also of interest because Au on TiO 2 has unusually high activity as a catalyst for CO oxidation at room temperature. In this review, we present results on the growth of ultrathin films of Au on TiO 2(110), as well as the morphology, interface formation, epitaxy, structure and electronic properties of Au on TiO 2 single crystal and planar films. The results are compared to studies of Au on high-surface-area TiO 2 catalysts in an attempt to bridge the gap between surface science experiments and the high pressure conditions of catalyst operation.

Selective Hydrogenation of Phenol Catalyzed by Palladium on High-Surface-Area Ceria at Room Temperature and Ambient Pressure

ACS Catalysis ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2051-2061 ◽  
Author(s):  
Nicholas C. Nelson ◽  
J. Sebastián Manzano ◽  
Aaron D. Sadow ◽  
Steven H. Overbury ◽  
Igor I. Slowing
Keyword(s):  
Surface Area ◽  
Selective Hydrogenation ◽  
Room Temperature ◽  
Ambient Pressure ◽  
High Surface ◽  
High Surface Area

One-dimensional cadmium hydroxide nanowires towards electrochemical supercapacitor

2015 ◽  
Vol 39 (12) ◽  
pp. 9124-9131 ◽  
Author(s):  
Savita Patil ◽  
Shrikant Raut ◽  
Ratnakar Gore ◽  
Babasaheb Sankapal
Keyword(s):  
Thin Film ◽  
Surface Area ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Temperature Synthesis ◽  
One Dimensional ◽  
Room Temperature Synthesis ◽  
Electrochemical Supercapacitor ◽  
Symmetric Supercapacitor

Room-temperature synthesis of Cd(OH)2 thin film consisting of high-surface-area nanowires. Device-grade development as a symmetric supercapacitor.

Template-Directed Electrodeposition of SnO2 Nanotubes and 1D Zn/SnO2 Core-Shell Nanostructures

2013 ◽  
Vol 745-746 ◽  
pp. 275-280 ◽  
Author(s):  
Min Lai ◽  
Yi Jian ◽  
Yan Ma ◽  
Gai Ge Zheng ◽  
Kun Zhong ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Room Temperature ◽  
Ph Value ◽  
Stannic Oxide ◽  
Core Shell ◽  
One Dimensional ◽  
Shell Nanostructures ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Polycarbonate Membranes

Template-directed electrosynthesis has been employed widely to prepare solids of defined dimension. It offers controllable routes to create nanostructures. In this study, one electrochemical method to fabricate one-dimensional metal oxide nanostructures was developed. The electrochemistry strategy was employed to manipulate the pH value within the pores of a template and the growth of continuous one-dimensional metal oxide nanostructures was controlled. The strategy was exemplified by the growth of tin oxide nanotubes. At room temperature, the reduction of nitrate within pores was employed to electrogenerate hydroxide ions and drive local precipitation of stannic oxide nanotubes. The nanotube walls displayed nearly uniform thickness along their entire length which were obtained within commercial track-etched polycarbonate membranes. One-dimensional Zn/SnO2 core-shell nanostructures were achieved by the further electrodeposition of Zn within SnO2 nanotubes.

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