A cost effective approach for developing substrate stable TiO2 nanotube arrays with tuned morphology: a comprehensive study on the role of H2O2 and anodization potential

2015 ◽  
Vol 39 (7) ◽  
pp. 5402-5409 ◽  
Author(s):  
Shibu Joseph ◽  
Pappu Sagayaraj
Keyword(s):  
Ethylene Glycol ◽  
Cost Effective ◽  
Tio2 Nanotube Arrays ◽  
The Self ◽  
Nanotube Arrays ◽  
Fesem Image ◽  
Self Organized ◽  
Cost Effective Approach ◽  
Comprehensive Study

The figure shows the FESEM image of the self-organized, highly ordered TiO2 nanotube arrays formed with an anodization potential of 60 V employing 3 vol% of H2O2 in an ethylene glycol electrolyte. The sample exhibited a maximum porosity of 88%.

The Preparation of TiO2 Nanotube Arrays

2011 ◽  
Vol 306-307 ◽  
pp. 1779-1784
Author(s):  
Lai Xue Pang ◽  
Peng Fei Cuan ◽  
Hong Shi ◽  
Xin De Tang
Keyword(s):  
Hydrogen Generation ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
The Self ◽  
Electrochemical Anodization ◽  
Nanotube Arrays ◽  
Self Organized ◽  
Water Photoelectrolysis ◽  
Sensitized Solar Cells

Vertically oriented, highly ordered TiO2 nanotube arrays were fabricated via electrochemical anodization of high purity Ti sheet and Ti foil, which is increasing importance due to their impressing properties in a variety of applications including dye-sensitized solar cells, hydrogen generation by water photoelectrolysis, potocatalysis, and gas sensor. The well aligned TiO2 nanotube arrays by potentiostatic anodization of Ti foil (with 0.3mm thickness) were constructed. We have achieved the self-aligned high ordered nanotube arrays in aqueous electrolyte containing HF and ethylene glycol electrolyte containing NH4F. Depending on the fluoride ion mobile velocity, the resulting nanotubes arrays exhibit the different morphology. The elaborated electrolyte on the morphology of the self-organized nanotubes arrays was investigated. Thermal annealing on the anodized Ti induced crystalline formation, which is confirmed by Raman spectroscopy measurement.

scholarly journals Highly Ordered TiO2 Nanotube Arrays with Engineered Electrochemical Energy Storage Performances

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 510
Author(s):  
Wangzhu Cao ◽  
Kunfeng Chen ◽  
Dongfeng Xue
Keyword(s):  
Tio2 Nanotubes ◽  
Lithium Ion ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Electrochemical Anodization ◽  
Nanotube Arrays ◽  
Free Standing ◽  
Structured Materials ◽  
Self Organized ◽  
Binder Free

Nanoscale engineering of regular structured materials is immensely demanded in various scientific areas. In this work, vertically oriented TiO2 nanotube arrays were grown by self-organizing electrochemical anodization. The effects of different fluoride ion concentrations (0.2 and 0.5 wt% NH4F) and different anodization times (2, 5, 10 and 20 h) on the morphology of nanotubes were systematically studied in an organic electrolyte (glycol). The growth mechanisms of amorphous and anatase TiO2 nanotubes were also studied. Under optimized conditions, we obtained TiO2 nanotubes with tube diameters of 70–160 nm and tube lengths of 6.5–45 μm. Serving as free-standing and binder-free electrodes, the kinetic, capacity, and stability performances of TiO2 nanotubes were tested as lithium-ion battery anodes. This work provides a facile strategy for constructing self-organized materials with optimized functionalities for applications.

The Susceptibility of Healthy People to COVID-19 Infection and the Role of ACE2

2021 ◽  
Author(s):  
Mehdi Kushkestani ◽  
Mohsen Parvani ◽  
Bakhtyar Tartibian ◽  
Rasoul Eslami
Keyword(s):  
Risk Factors ◽  
Cost Effective ◽  
Normal Subjects ◽  
Definitive Treatment ◽  
Activity Levels ◽  
Cost Effective Approach ◽  
Increased Risk ◽  
Physical Activity Levels ◽  
Ace2 Gene

The COVID-19 virus has caused many deaths of people worldwide since the pandemic began. However, no definitive treatment for this infection has been discovered so far. It has been shown that comorbidities such as diabetes, hypertension and cardiovascular diseases are associated with an increased risk of SARS-COV-2 infection. Interestingly, SARS-COV-2, like SARS-COV, uses the ACE2 gene to enter the host cell. Also, changes or imbalance in ACE2.ACE can affect SARS-COV-2 susceptibility, related outcomes and mortality. Regarding the crucial role of ACE2 protein in COVID-19 infection, the effect of different factors such as age, BMI, physical activity levels, nutritional status, altitude, as well as blood group was assessed on the level of this protein. Further, to our knowledge, no study has been conducted to examine factors that increase or decrease the risk of COVID-19 and its related severity and outcome in normal subjects emphasizing the pivotal role of ACE2. Therefore, the primary purpose of this study was to investigate the involved mechanisms of ACE2 protein and other risk factors causing infection in different situations and finally, to introduce a safe, accurate, and cost-effective approach to prevent SARS-COV-2 infection and hard clinical outcomes in normal subjects.

Quantitative Selection of Variation Reduction Plans

1998 ◽  
Author(s):  
Anna C. Thornton
Keyword(s):  
Risk Mitigation ◽  
Cost Effective ◽  
Variation Reduction ◽  
Multiple Quality Characteristics ◽  
Cost Effective Approach ◽  
Manufacturing Performance ◽  
The Impact ◽  
Manufacturing Variation ◽  
Selection Of

Abstract Quality has been a rallying call in the design and manufacturing world for the last two decades. One way to improve quality is to reduce the impact of manufacturing variation. Variation risk mitigation is challenging especially when a product has multiple quality characteristics and complex production and assembly. It is common wisdom that companies should identify and mitigate the risk associated with variation throughout the design process. As yield problems are identified, they should be mitigated using the most cost effective approach. One approach to variation risk mitigation is variation reduction (VR). VR targets reduction of variation introduced by existing manufacturing processes using tools such as Design of Experiments (DOE) and robust design. Many companies have specialized groups that specialize in these methods. VR teams have the role of improving manufacturing performance; however, these teams are limited in their resources. In addition, no tools exist to quantitatively determine where a VR team’s efforts are most effectively deployed. This paper provides a mathematical and optimization model to best allocate VR resources in a complex product.

C-axis preferentially oriented and fully activated TiO2 nanotube arrays for lithium ion batteries and supercapacitors

2014 ◽  
Vol 2 (29) ◽  
pp. 11454-11464 ◽  
Author(s):  
Dengyu Pan ◽  
He Huang ◽  
Xueyuan Wang ◽  
Liang Wang ◽  
Haobo Liao ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Ethylene Glycol ◽  
Lithium Ion Batteries ◽  
Oxygen Vacancies ◽  
Lithium Ion ◽  
Tio2 Nanotube Arrays ◽  
Nanotube Arrays ◽  
High Concentration ◽  
Oxygen Conditions ◽  
Titanium Dioxide Nanotube Arrays

We report the fabrication of long titanium dioxide nanotube arrays with highly c-axis preferentially oriented crystallization and a high concentration of oxygen vacancies by second anodization in ethylene glycol and annealing under poor-oxygen conditions.

Mechanism study of self-organized TiO2 nanotube arrays by anodization

2008 ◽  
Vol 32 (12) ◽  
pp. 2164 ◽  
Author(s):  
Jinliang Tao ◽  
Jianling Zhao ◽  
Chengcun Tang ◽  
Yingru Kang ◽  
Yangxian Li
Keyword(s):  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Mechanism Study ◽  
Self Organized

SELF-ORDERING ELECTROCHEMICAL SYNTHESIS OF TiO2 NANOTUBE ARRAYS: CONTROLLING THE NANOTUBE GEOMETRY AND THE GROWTH RATE

2011 ◽  
Vol 10 (01n02) ◽  
pp. 55-58 ◽  
Author(s):  
KRISHNA KANT ◽  
DUSAN LOSIC
Keyword(s):  
Growth Rate ◽  
Ethylene Glycol ◽  
Electrochemical Synthesis ◽  
The Self ◽  
Electrochemical Anodization ◽  
Nanotube Arrays ◽  
Anodization Voltage ◽  
Nanotube Array ◽  
Anodization Time ◽  
Nanotube Growth

We report the fabrication of highly ordered TiO 2 nanotube arrays employing electrochemical anodization of titanium using an organic electrolyte comprised of water, NH 4 F , and ethylene glycol. To achieve the self-ordering regime of TiO 2 nanotube growth and reliable fabrication optimal potential window between 80 and 100 V was determined. We show that anodization voltage can be used not only to control nanotube diameters (70–180 nm) but also to have impact on nanotube growth rate. The anodization voltage and anodization time were used to adjust the length of TiO 2 nanotube (thickness of nanotube layer). TiO 2 nanotube array films and self-supporting layers with thickness from < 5 μm to > 250 μm were routinely fabricated.

Sign in / Sign up

Export Citation Format

Share Document