scholarly journals Ion Transport Phenomena in Anodic Nanoporous Alumina Membranes

2019 ◽  
Vol 70 (1) ◽  
pp. 31-34
Author(s):  
Tomokazu FUKUTSUKA ◽  
Yuto MIYAHARA ◽  
Kohei MIYAZAKI ◽  
Takeshi ABE
Keyword(s):  
Ion Transport ◽  
Transport Phenomena ◽  
Nanoporous Alumina ◽  
Alumina Membranes

scholarly journals Influence of Pore-Size/Porosity on Ion Transport and Static BSA Fouling for TiO2-Covered Nanoporous Alumina Membranes

2021 ◽  
Vol 11 (12) ◽  
pp. 5687
Author(s):  
Lourdes Gelde ◽  
Ana Laura Cuevas ◽  
Juana Benavente
Keyword(s):  
Ion Transport ◽  
Light Transmission ◽  
Electrochemical Impedance ◽  
Membrane Surface ◽  
Electrochemical Techniques ◽  
Visible Region ◽  
Geometrical Parameters ◽  
Tio2 Sample ◽  
Nanoporous Alumina ◽  
Alumina Membranes

The influence of geometrical parameters (pore radii and porosity) on ion transport through two almost ideal nanoporous alumina membranes (NPAMs) coated with a thin TiO2 layer by the atomic layer deposition technique (Sf-NPAM/TiO2 and Ox-NPAM/TiO2 samples) was analyzed by membrane potential and electrochemical impedance spectroscopy measurements. The results showed the significant effect of pore radii (10 nm for Sf-NPAM/TiO2 and 13 nm for Ox-NPAM/TiO2) when compared with porosity (9% and 6%, respectively). Both electrochemical techniques were also used for estimation of protein (bovine serum albumin or BSA) static fouling, and the results seem to indicate deposition of a BSA layer on the Sf-NPAM/TiO2 fouled membrane surface but pore-wall deposition in the case of the fouled Ox-NPAM/TiO2 sample. Moreover, a typical and simple optical technique such as light transmission/reflection (wavelength ranging between 0 and 2000 nm) was also used for membrane analysis, showing only slight transmittance differences in the visible region when both clean membranes were compared. However, a rather significant transmittance reduction (~18%) was observed for the fouled Sf-NPAM/TiO2 sample compared to the fouled Ox-NPAM/TiO2 sample, and was associated with BSA deposition on the membrane surface, thus supporting the electrochemical analysis results.

scholarly journals Ion Transport in Organic Electrolyte Solution through the Pore Channels of Anodic Nanoporous Alumina Membranes

2016 ◽  
Vol 199 ◽  
pp. 380-387 ◽  
Author(s):  
Tomokazu Fukutsuka ◽  
Kohei Koyamada ◽  
Shohei Maruyama ◽  
Kohei Miyazaki ◽  
Takeshi Abe
Keyword(s):  
Ion Transport ◽  
Electrolyte Solution ◽  
Organic Electrolyte ◽  
Nanoporous Alumina ◽  
Alumina Membranes ◽  
Organic Electrolyte Solution

Compact and efficient gas diffusion electrodes based on nanoporous alumina membranes for microfuel cells and gas sensors

The Analyst ◽  
2020 ◽  
Vol 145 (1) ◽  
pp. 122-131 ◽  
Author(s):  
Wanda V. Fernandez ◽  
Rocío T. Tosello ◽  
José L. Fernández
Keyword(s):  
Response Times ◽  
Hydrogen Oxidation ◽  
Fast Response ◽  
Gas Diffusion ◽  
Limiting Current ◽  
Gas Diffusion Electrodes ◽  
Nanoporous Alumina ◽  
Alumina Membranes ◽  
Current Densities ◽  
Microfuel Cells

Gas diffusion electrodes based on nanoporous alumina membranes electrocatalyze hydrogen oxidation at high diffusion-limiting current densities with fast response times.

scholarly journals Nanoporous Alumina Membranes for Sugar Industry: An Investigation of Sintering Parameters Influence onUltrafiltration Performance

2021 ◽  
Vol 13 (14) ◽  
pp. 7593
Author(s):  
Farooq Khan Niazi ◽  
Malik Adeel Umer ◽  
Ashfaq Ahmed ◽  
Muhammad Arslan Hafeez ◽  
Zafar Khan ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Pore Size ◽  
Sugar Industry ◽  
Average Pore Size ◽  
Research Work ◽  
Homogeneous Distribution ◽  
Alumina Membrane ◽  
Average Pore ◽  
Nanoporous Alumina ◽  
Alumina Membranes

Ultrafiltration membranes offer a progressive and efficient means to filter out various process fluids. The prime factor influencing ultrafiltration to a great extent is the porosity of the membranes employed. Regarding membrane development, alumina membranes are extensively studied due to their uniform porosity and mechanical strength. The present research work is specifically aimed towards the investigation of nanoporous alumina membranes, as a function of sintering parameters, on ultrafiltration performance. Alumina membranes are fabricated by sintering at various temperatures ranging from 1200–1300 °C for different holding times between 5–15 h. The morphological analysis, conducted using Scanning electron microscopy (SEM), revealed a homogeneous distribution of pores throughout the surface and cross-section of the membranes developed. It was observed that an increase in the sintering temperature and time resulted in a gradual decrease in the average pore size. A sample with an optimal pore size of 73.65 nm achieved after sintering at 1250 °C for 15 h, was used for the evaluation of ultrafiltration performance. However, the best mechanical strength and highest stress-bearing ability were exhibited by the sample sintered at 1300 °C for 5 h, whereas the sample sintered at 1250 °C for 5 h displayed the highest strain in terms of compression. The selected alumina membrane sample demonstrated excellent performance in the ultrafiltration of sugarcane juice, compared to the other process liquids.

scholarly journals Magnetization reversal mechanisms in Fe/NiO bilayers grown onto nanoporous alumina membranes and Si wafers

AIP Advances ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 015113
Author(s):  
Enrique Navarro ◽  
María Alonso ◽  
Ana Ruiz ◽  
Unai Urdiroz ◽  
Marta Sánchez-Agudo ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Nanoporous Alumina ◽  
Alumina Membranes

scholarly journals Relativistic effects in EELS of nanoporous alumina membranes

2003 ◽  
Vol 68 (24) ◽  
Author(s):  
N. Zabala ◽  
A. G. Pattantyus-Abraham ◽  
A. Rivacoba ◽  
F. J. García de Abajo ◽  
M. O. Wolf
Keyword(s):  
Relativistic Effects ◽  
Nanoporous Alumina ◽  
Alumina Membranes

scholarly journals Pore spanning lipid bilayers on silanised nanoporous alumina membranes

2008 ◽  
Author(s):  
Abdul M. Md Jani ◽  
Jinwen Zhou ◽  
Matthew R. Nussio ◽  
Dusan Losic ◽  
Joe G. Shapter ◽  
...  
Keyword(s):  
Lipid Bilayers ◽  
Nanoporous Alumina ◽  
Alumina Membranes

Photoluminescence and its damping kinetics of nanoporous alumina membranes formed in solutions of various carboxylic acids

2021 ◽  
Author(s):  
I. A. Vrublevsky ◽  
K. V. Chernyakova ◽  
E. N. Muratova ◽  
Yu. M. Spivak ◽  
V. A. Moshnikov
Keyword(s):  
Carboxylic Acids ◽  
Nanoporous Alumina ◽  
Alumina Membranes ◽  
Kinetics Of
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