A novel electrochemical anodization cell for the synthesis of mesoporous silicon

2020 ◽  
Vol 91 (10) ◽  
pp. 105113
Author(s):  
N. Gostkowska-Lekner ◽  
D. Wallacher ◽  
N. Grimm ◽  
K. Habicht ◽  
T. Hofmann
Keyword(s):  
Electrochemical Anodization ◽  
Mesoporous Silicon

scholarly journals Tailoring Mesoporous Silicon Surface to Form a Versatile Template for Nanoparticle Deposition

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 699
Author(s):  
Nadzeya Khinevich ◽  
Mindaugas Juodėnas ◽  
Asta Tamulevičienė ◽  
Hanna Bandarenka ◽  
Sigitas Tamulevičius
Keyword(s):  
Current Density ◽  
Superficial Layer ◽  
Electrochemical Anodization ◽  
Nanoparticle Arrays ◽  
Pore Density ◽  
Mesoporous Silicon ◽  
Nanoparticle Deposition ◽  
Before And After ◽  
Pore Opening ◽  
Opening Process

Porous silicon (PS) can be used as a loading template in sensing or as a matrix to develop nanoparticle arrays. We present a comprehensive study of PS morphology and optical properties before and after the pore opening process, including the determination of thickness, pore size, and pore density of PS layers, its surface wettability, and reflectivity. The PS samples were fabricated by electrochemical anodization of monocrystalline silicon wafer in 5–20 wt.% hydrofluoric acid (HF) solution at a current density in the range of 20–200 mA/cm2. Anodization was followed by the pore opening process, i.e., the removal of a parasitic superficial layer with a “bottleneck” structure by reactive ion etching (RIE). The results illustrate that “bottleneck”-free PS allows to achieve a high pore density using a low HF concentration and a reduced current density. We established that this structure demonstrates higher hydrophobicity in comparison to the samples before RIE. The applicability of the developed “bottleneck”-free PS was tested via filling the pores with silver nanoparticles, indicating its potential use as a template for the fabrication of nanoparticle arrays.

Study on Hemostatic Materials of Mesoporous Silicon Dioxide Doped Ca and Ag with Antibacterial Properties

2012 ◽  
Vol 27 (5) ◽  
pp. 513-518
Author(s):  
Yu CHEN ◽  
Wen-Rui LI ◽  
Can XU ◽  
Jia-Can SU ◽  
Ming LI ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Antibacterial Properties ◽  
Mesoporous Silicon ◽  
Mesoporous Silicon Dioxide

Formation of spinel CoFe2O4 nanoporous oxide layers by electrochemical anodization

2021 ◽  
pp. 114296
Author(s):  
Naima Ennassiri ◽  
Artjom Roth ◽  
Hamid Ez-Zahraouy ◽  
Mohammed Es-Souni
Keyword(s):  
Electrochemical Anodization ◽  
Oxide Layers

Photocatalytic hydrogen generation using mesoporous silicon nanoparticles: influence of magnesiothermic reduction conditions and nanoparticle aging on the catalytic activity

Nanoscale ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 2685-2692
Author(s):  
Isabel S. Curtis ◽  
Ryan J. Wills ◽  
Mita Dasog
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Silicon Nanoparticles ◽  
Hydrogen Generation ◽  
Oxide Content ◽  
Magnesiothermic Reduction ◽  
Mesoporous Silicon ◽  
High Crystallinity ◽  
Photocatalytic Hydrogen Generation

High crystallinity, low oxide content, and low sintering lead to optimally performing mesoporous Si photocatalysts for solar-driven hydrogen production.

Hetero-structured V-Ni3S2@NiOOH core-shell nanorods from an electrochemical anodization for water splitting

2021 ◽  
Vol 856 ◽  
pp. 158219
Author(s):  
Yao Wang ◽  
Jinchao Liu ◽  
Yifei Liao ◽  
Chaoling Wu ◽  
Yungui Chen
Keyword(s):  
Water Splitting ◽  
Electrochemical Anodization ◽  
Core Shell

scholarly journals TiO2 Nanotubes Architectures for Solar Energy Conversion

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 931
Author(s):  
Yin Xu ◽  
Giovanni Zangari
Keyword(s):  
Solar Energy ◽  
Tio2 Nanotubes ◽  
Fossil Fuels ◽  
Photovoltaic Effect ◽  
Electric Energy ◽  
Chemical Species ◽  
Electrochemical Anodization ◽  
Science And Engineering ◽  
Electric Energy Storage ◽  
The Usa

Electromagnetic light from the Sun is the largest source, and the cleanest energy available to us; extensive efforts have been dedicated to developing science and engineering solutions in order to avoid the use of fossil fuels. Solar energy transforms photons into electricity via the photovoltaic effect, generating about 20 GW of energy in the USA in 2020, sufficient to power about 17 million households. However, sunlight is erratic, and technologies to store electric energy storage are unwieldy and relatively expensive. A better solution to store energy and to deliver this energy on demand is storage in chemical bonds: synthesizing fuels such as H2, methane, ethanol, and other chemical species. In this review paper we focus on titania (TiO2) nanotubes grown through electrochemical anodization and various modifications made to them to enhance conversion efficiency; these semiconductors will be used to implement the synthesis of H2 through water splitting. This document reviews selected research efforts on TiO2 that are ongoing in our group in the context of the current efforts worldwide. In addition, this manuscript is enriched by discussing the latest novelties in this field.

scholarly journals Mesoporous Silicon/Polypyrrole Based Structures for Paranitrophenol Sensing

Silicon ◽  
2021 ◽  
Author(s):  
Fatma Zohra Tighilt ◽  
Samia Belhousse ◽  
Anis Rahal ◽  
Khaled Hamdani ◽  
Naima Belhaneche ◽  
...  
Keyword(s):  
Mesoporous Silicon

Anodic synthesis of TiO2 nanotubes by step-up voltages

2021 ◽  
pp. 002199832110237
Author(s):  
V Sivaprakash ◽  
R Narayanan
Keyword(s):  
Corrosion Resistance ◽  
Tio2 Nanotubes ◽  
Biomedical Applications ◽  
Phase Changes ◽  
Electrochemical Anodization ◽  
Corrosion Resistant ◽  
Anodization Process ◽  
Anodic Synthesis ◽  
Input Potential

Fabrication of TiO2 nanotubes (NTs) has extensive application properties due to their high corrosion resistant and compatibility with biomedical applications, the synthesis of TiO2 nanotubes over titanium has drawn interest in various fields. The synthesis of TiO2 NTs using novel in-situ step-up voltage conditions in the electrochemical anodization process is recorded in this work. For manufacturing the NTs at 1 hour of anodization, the input potential of 30, 40 and 50 V was selected. With increasing step-up voltage during the anodization process, an improvement in the NTs was observed, favoring corrosion resistance properties. The surface of NTs enhances the structure of the ribs, raising the potential for feedback over time. XRD was used to analyze phase changes, and HR-SEM analyzed surface topography. Impedance tests found that longer NTs improved the corrosion resistance.

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