Morphological and optical properties of ultra‐thin nanostructured Cu films deposited by RF sputtering on nanoporous anodic alumina substrate

2016 ◽  
Vol 11 (6) ◽  
pp. 295-298 ◽  
Author(s):  
Mohamed Shaban ◽  
Ashour M. Ahmed ◽  
Ehab Abdel‐ Rahman ◽  
Hany Hamdy
Keyword(s):  
Optical Properties ◽  
Rf Sputtering ◽  
Anodic Alumina ◽  
Alumina Substrate ◽  
Cu Films ◽  
Nanoporous Anodic Alumina

scholarly journals Nano-PAA-CuCl2 Composite as Fenton-Like Reusable Catalyst to Enhanced Degrade Organic Pollutant MB/MO

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 10
Author(s):  
Yang Dang ◽  
Yu Cheng ◽  
Yukun Zhou ◽  
Yifei Huang ◽  
Kaige Wang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Self Assembly ◽  
Organic Pollutant ◽  
Energy Dispersive Spectrometer ◽  
Chemical Properties ◽  
Anodic Alumina ◽  
Alumina Substrate ◽  
Reusable Catalyst ◽  
X Ray ◽  
Nanoporous Anodic Alumina

The treatment of organic dye contaminants in wastewaters has now becoming more imperative. Fenton-like degradation of methylene blue (MB) and methyl orange (MO) in aqueous solution was investigated by using a nanostructure that a layer of CuCl2 nanoflake film grown on the top surface of nanoporus anodic alumina substrate (nano-PAA-CuCl2) as catalyst. The new nano-PAA-CuCl2 composite was fabricated with self-assembly approach, that is, a network porous structure film composed of CuCl2 nanoflake grown on the upper surface of nanoporous anodic alumina substrate, and the physical and chemical properties are characterized systematically with the X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and high-resolution transmission electron microscopy (HRTEM), Energy Dispersive Spectrometer (EDS), X-ray photoelectron spectroscopy (XPS). The experimental results showed that the nano-PAA-CuCl2 catalyst presented excellent properties for the degradation of two typical organic pollutants such as MB and MO, which were almost completely degraded with 8 × 10−4mol/L nano-PAA-CuCl2 catalyst after 46 min and 60 min at reaction conditions of H2O2 18 mM and 23 mM, respectively. The effects of different reaction parameters such as initial pH, H2O2 concentration, catalyst morphology and temperature were attentively studied. And more, the stability and reusability of nano-PAA-CuCl2 were examined. Finally, the mechanism of MB and MO degradation by the nano-PAA-CuCl2/H2O2 system was proposed, based on the experimental data of the BCA and the temperature-programmed reduction (H2-TPR) and theoretical analysis, the reaction kinetics belonged to the pseudo-first-order equation. This new nanoporous composite material and preparation technology, as well as its application in Fenton-like reaction, provide an effective alternative method with practical application significance for wastewater treatment.

Optical Properties of Nanoporous Anodic Alumina and Derived Applications

2015 ◽  
pp. 185-217 ◽  
Author(s):  
Josep Ferré-Borrull ◽  
Elisabet Xifré-Pérez ◽  
Josep Pallarès ◽  
Lluis F. Marsal
Keyword(s):  
Optical Properties ◽  
Anodic Alumina ◽  
Nanoporous Anodic Alumina

scholarly journals Effect of Pore Thickness and the State of Polarization on the Optical Properties of Hexagonal Nanoarray of Au/Nanoporous Anodic Alumina Membrane

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Mohamed Shaban
Keyword(s):  
Optical Properties ◽  
Building Blocks ◽  
Anodic Alumina ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Anodic Alumina Membrane ◽  
Alumina Membrane ◽  
Nanoporous Anodic Alumina ◽  
Anodization Time ◽  
State Of Polarization

Hexagonal nanoarrays of Au particles were deposited on nanoporous anodic alumina membrane (NAAM) utilizing r.f. magnetron sputtering. The thickness of the NAAMs is adjusted by changing the second anodization time from 5 min to 20 min. The surface morphology, composition, and optical properties are characterized by using SEM, EDX, and spectrophotometer, respectively. The effects of the NAAM thickness and state of polarization on the morphological changes and on the optical properties of the fabricated nanoarrays were addressed. According to the measured optical spectra, the rate of decrease of NAAMs refractive index was found to be 3.825 × 10−4 nm−1. Using the modified Kubelka-Munk radiative transfer model, the energy gap of NAAMs was calculated from diffused reflectance and was decreased from 1.682 to 1.376 as the anodization time increased from 5 to 20 min. Also, the saturation of interference fringes is substantially enhanced, and field enhancement can be achieved due to the excitation and constructive interference of surface plasmon waves by coating NAAMs with the hexagonal nanoarrays of Au. Based on the advantages of the fabrication approach and the enhanced and controlled properties, this new generation of samples can be used as promising building blocks for nanophotonic and nanoelectronics devices.

Titanium dioxide-coated nanoporous anodic alumina optical properties

2019 ◽  
Vol 489 ◽  
pp. 239-246 ◽  
Author(s):  
Sara M. Aguilar-Sierra ◽  
Josep Ferré-Borrull ◽  
Félix E. Echeverría ◽  
Lluís F. Marsal
Keyword(s):  
Titanium Dioxide ◽  
Optical Properties ◽  
Anodic Alumina ◽  
Nanoporous Anodic Alumina

scholarly journals Engineering optical properties of gold-coated nanoporous anodic alumina for biosensing

2014 ◽  
Vol 9 (1) ◽  
pp. 414 ◽  
Author(s):  
Laura P Hernández-Eguía ◽  
Josep Ferré-Borrull ◽  
Gerard Macias ◽  
Josep Pallarès ◽  
Lluís F Marsal
Keyword(s):  
Optical Properties ◽  
Anodic Alumina ◽  
Nanoporous Anodic Alumina

Photoswitchable Membranes Based on Peptide‐Modified Nanoporous Anodic Alumina: Toward Smart Membranes for On‐Demand Molecular Transport

2015 ◽  
Vol 27 (19) ◽  
pp. 3019-3024 ◽  
Author(s):  
Tushar Kumeria ◽  
Jingxian Yu ◽  
Mohammed Alsawat ◽  
Mahaveer D. Kurkuri ◽  
Abel Santos ◽  
...  
Keyword(s):  
Molecular Transport ◽  
Anodic Alumina ◽  
Nanoporous Anodic Alumina ◽  
On Demand

New 8-oxo-7,8-2´deoxyguanosine nanoporous anodic alumina aptasensor for colorectal cancer diagnosis in blood and urine

Nanoscale ◽  
2021 ◽  
Author(s):  
Luis Pla ◽  
Felix Sancenón ◽  
M.Carmen Martinez-Bisbal ◽  
Celia Banuls ◽  
Nuria Estañ ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Colorectal Cancer ◽  
Cancer Diagnosis ◽  
Anodic Alumina ◽  
Human Diseases ◽  
Nanoporous Anodic Alumina

Many important human diseases, and specially cancer, have been related to the overproduction of 8-oxo-7,8-dihydro-2´-deoxyguanosine (8-oxo-dG). This molecule is a product of oxidative stress processes over nucleophilic bases in DNA....

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