THE DEPENDENCE OF ALUMINA NANOWIRE FORMATION FROM POROUS ANODIC ALUMINA MEMBRANES ON THE ETCHING SOLUTION

2012 ◽  
Vol 26 (03) ◽  
pp. 1150017 ◽  
Author(s):  
JIN KYU HAN ◽  
JIN HO KWAK ◽  
YONG CHAN CHOI ◽  
SANG DON BU
Keyword(s):  
Formation Mechanism ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Morphological Properties ◽  
Alumina Membrane ◽  
Etching Solution ◽  
Membrane Filters ◽  
Alumina Membranes ◽  
Technological Developments ◽  
Selection Of

We describe variations in the structure and formation mechanism of alumina nanowires (ANWs) formed from porous anodic alumina (PAA) membranes, depending on the composition of the etching solution. Two types of ANWs were synthesized by etching PAA membranes in etching solutions containing H 3 PO 4 or NaOH . Not only did the ANW formation mechanism vary, but also the morphological properties and the surface chemical composition of the ANWs varied with the etching solution used. These results suggest that the ANW surfaces may be optimized by the appropriate selection of etching solution. The optimization of ANWs may potentially advance, for example, water purification technological developments because ANWs have, in recent studies, provided more effective filtration performances than nanoporous alumina membrane filters.

scholarly journals Study on the Influence of Porous Anodic Alumina Membrane on Separation of Hydrogen and Methane

2013 ◽  
Vol 652-654 ◽  
pp. 362-366
Author(s):  
Qi Peng Yang ◽  
Xue Bo Zhao ◽  
Xiu Lin Wang
Keyword(s):  
Electron Microscopy ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Anodic Alumina Membrane ◽  
Alumina Membrane ◽  
Separation Index ◽  
Alumina Membranes ◽  
Different Thickness ◽  
Microscopy Images ◽  
Scanning Electron

Hydrogen and methane have been regarded as the main energy for future. In recent years, membrane technology has developed to be an attractive technology to separate them. In this paper, porous anodic alumina membranes at different thickness were prepared for separation of hydrogen and methane. The thickness varied from about 77 to 250 μm, moreover, the SEM (Scanning Electron Microscopy) images show a good linear relationship between the thickness (y) and anodizing time (x), with the fitting being y = 22.56x - 36.082. Gas permeance and separation index for hydrogen and methane were measured at different conditions, such as thickness and temperature. With the thickness increased, the permeances of two gases were decreased quickly but separation index vice versa. In this research, the actual separation index changed from 1.9 to 3.2.

scholarly journals Spontaneous formation of ordered Sn nanodot array on porous anodic alumina membrane

2007 ◽  
Vol 56 (11) ◽  
pp. 6712
Author(s):  
Huang Li-Qing ◽  
Pan Hua-Qiang ◽  
Wang Jun ◽  
Tong Hui-Min ◽  
Zhu Ke ◽  
...  
Keyword(s):  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Anodic Alumina Membrane ◽  
Alumina Membrane ◽  
Spontaneous Formation ◽  
Nanodot Array

Uniform and Reproducible Barrier Layer Removal of Porous Anodic Alumina Membrane

2010 ◽  
Vol 10 (5) ◽  
pp. 3380-3384 ◽  
Author(s):  
Mohamed Shaban ◽  
Hany Hamdy ◽  
Fayez Shahin ◽  
Joonmo Park ◽  
Sang-Wan Ryu
Keyword(s):  
Barrier Layer ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Anodic Alumina Membrane ◽  
Alumina Membrane ◽  
Layer Removal

SYNTHESIS OF In2O3 NANOWIRES ENHANCED BY ANODIC ALUMINA MEMBRANE

2006 ◽  
Vol 05 (04n05) ◽  
pp. 479-485
Author(s):  
C. W. LAI ◽  
X. Y. ZHANG ◽  
H. C. ONG ◽  
J. Y. DAI ◽  
H. L. W. CHAN
Keyword(s):  
Electron Microscopy ◽  
Large Scale ◽  
Anodic Alumina ◽  
X Ray Diffraction ◽  
Alumina Membrane ◽  
Thermal Evaporation Method ◽  
Single Crystalline ◽  
X Ray ◽  
Alumina Membranes ◽  
Transmission Electron

Large-scale single crystalline In 2 O 3 nanowires were successfully synthesized on anodic alumina membranes by a simple thermal evaporation method at 570°C. X-ray diffraction, transmission electron microscopy, and scanning electron microscopy studies revealed the formation of single crystalline In 2 O 3 nanowires with diameters of 50–100 nm and lengths of up to a few hundreds of micrometers. Cathodeluminescence study revealed existence of oxygen vacancies evidenced by a strong and broad emission at 470 nm with a shoulder at 400 nm. The growth mechanism of the nanostructures is also discussed.

scholarly journals Etching the Oxide Barrier of Micrometer-Scale Self-Organized Porous Anodic Alumina Membranes

2015 ◽  
Vol 162 (4) ◽  
pp. E47-E50 ◽  
Author(s):  
Jonathan Bellemare ◽  
Louis-Philippe Carignan ◽  
Frédéric Sirois ◽  
David Ménard
Keyword(s):  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Alumina Membranes ◽  
Self Organized ◽  
Oxide Barrier ◽  
Micrometer Scale

Exceptional high selectivity of hydrogen/methane separation on a phosphonate-based MOF membrane with exclusion of methane molecules

2017 ◽  
Vol 53 (70) ◽  
pp. 9797-9800 ◽  
Author(s):  
Qipeng Yang ◽  
Liangjun Li ◽  
Weiqiang Tan ◽  
Yingjie Sun ◽  
Huanli Wang ◽  
...  
Keyword(s):  
High Selectivity ◽  
Metal Organic Framework ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Anodic Alumina Membrane ◽  
Alumina Membrane ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

A phosphonate-based metal–organic framework membrane was constructed on a porous anodic alumina membrane (PAAM) substrate for H2/CH4 separation for the first time.

Sign in / Sign up

Export Citation Format

Share Document