Hydrogen Bubble-Directed Tubular Structure: A Novel Mechanism to Facilely Synthesize Nanotube Arrays with Controllable Wall Thickness

2021 ◽  
Vol 13 (4) ◽  
pp. 5418-5424
Author(s):  
Yanfang Shen ◽  
Jiannan Pan ◽  
Xinyue Hu ◽  
Hui-Min Wen ◽  
John Q. Xiao ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Tubular Structure ◽  
Nanotube Arrays ◽  
Hydrogen Bubble

scholarly journals Photoelectrochemical Performance of Smooth TiO2Nanotube Arrays: Effect of Anodization Temperature and Cleaning Methods

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Chin Wei Lai ◽  
Srimala Sreekantan
Keyword(s):  
Wall Thickness ◽  
High Efficiency ◽  
Charge Transfer Resistance ◽  
Nanotube Arrays ◽  
Photoelectrochemical Performance ◽  
Transfer Resistance ◽  
Self Organized ◽  
Different Temperatures ◽  
Cleaning Methods ◽  
Low Charge

The formation of self-organized titanium dioxide (TiO2) nanotube arrays without bundling or clustering is essential for their high efficiency in photoelectrochemical (PEC) application. The present paper reports on the use of different temperatures to control the specific architecture of nanotube arrays and effective cleaning techniques to ensure the formation of clean TiO2nanotube surface. The wall thickness of nanotube arrays could be controlled from 12.5 nm to 37.5 nm through different anodization temperature ranging from 10°C to 80°C. Furthermore, ultrasonic cleaning combined with acetone showed the high-ordered TiO2nanotube arrays without morphological disorder, bundling, and microcrack problems. Based on the results obtained, a higher PEC response of 1 mA/cm2and a photoconversion efficiency of 1.3% could be achieved using a wall thickness of 12.5 nm and defect-free TiO2nanotube arrays for low charge transfer resistance.

Potential-induced reversible switching in the tubular structure of conducting polypyrrole nanotube arrays

RSC Advances ◽  
2013 ◽  
Vol 3 (35) ◽  
pp. 14946 ◽  
Author(s):  
Jingwen Liao ◽  
Shishu Huang ◽  
Chengyun Ning ◽  
Guoxin Tan ◽  
Haobo Pan ◽  
...  
Keyword(s):  
Tubular Structure ◽  
Nanotube Arrays ◽  
Conducting Polypyrrole ◽  
Polypyrrole Nanotube

Fabrication and magnetic properties of free-standing Ni nanotube arrays with controllable wall thickness

2012 ◽  
Vol 100 (5) ◽  
pp. 052402 ◽  
Author(s):  
Y. L. Li ◽  
S. L. Tang ◽  
R. Xie ◽  
Y. Wang ◽  
M. Yang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Wall Thickness ◽  
Nanotube Arrays ◽  
Free Standing

Preparation of PbTiO3 Nanotubes by Electrophoretic Deposition Method and Effect of the Electrophoretic Voltage on the Wall Thickness

2014 ◽  
Vol 1587 ◽  
Author(s):  
E. Rahmati Adarmanabadi ◽  
A. Nourmohammadi ◽  
M. H. Feiz ◽  
M. Lanki
Keyword(s):  
Wall Thickness ◽  
Gel Electrophoresis ◽  
Sol Gel ◽  
Nanotube Arrays ◽  
Deposition Method ◽  
High Quality ◽  
Alumina Template ◽  
Porous Anodic Alumina Template ◽  
Anodic Alumina Template ◽  
Electrophoresis Technique

ABSTRACTIn the current research, we have utilized sol-gel electrophoresis technique to grow PbTiO3 nanotube arrays in porous anodic alumina template channels. By using this method high quality and more condense nanotubes are obtained compared with other usual sol-gel methods. Also, the effect of the anodizing parameters on the diameter of the template pores, and effect of electrophoresis voltage on wall thickness were investigated.

Magnetism in Cylindrical NiFe Nanotubes

2010 ◽  
Vol 1258 ◽  
Author(s):  
hwifen liew ◽  
Sarjoosing Goolaup ◽  
Xinghua Wang ◽  
Wensiang Lew
Keyword(s):  
Wall Thickness ◽  
Material Properties ◽  
Magnetic Vortex ◽  
Magnetic Saturation ◽  
Nanotube Arrays ◽  
Magnetization Process ◽  
Conductive Layer ◽  
Soft Magnetic ◽  
Simulation Results ◽  
Nanoporous Templates

AbstractWe report the fabrication of ferromagnetic NiFe nanotubes with a wall thickness of 80 nm by electrodeposition in nanoporous templates. The structure and wall thickness of the nanotubes are controlled by the thickness of the conductive layer at the back of the templates. The NiFe nanotubes have shown soft magnetic material properties with high magnetic saturation and low coercivity. The NiFe nanotube arrays are preferentially magnetized in the perpendicular direction to the nanotubes. Micromagnetic simulation results show that a curling mode is perceived with the formation of opposite magnetic vortex states on the end of the nanotube surface during the magnetization process.

Improved Photoelectrochemical Properties of Cu-Loaded TiO2 Nanotubes

2010 ◽  
Vol 148-149 ◽  
pp. 1083-1086
Author(s):  
Xin Sheng Yang ◽  
Hern Kim
Keyword(s):  
Copper Oxide ◽  
Wall Thickness ◽  
Photochemical Activity ◽  
Tio2 Nanotube Arrays ◽  
Tio2 Nanotube ◽  
Nanotube Arrays ◽  
Photoelectrochemical Properties ◽  
Remarkable Improvement ◽  
20 Nm ◽  
Annealed Copper

Cu-loaded TiO2 nanotube arrays were fabricated by immersing the anodized nanotube arrays in Cu(NO3)2 solution and then post-annealed. Copper oxide with diameter about 20 nm was loaded on the nanotube arrays with tube diameter about 140 nm, the wall thickness about 40 nm and the length about 4 µm. Cu-loaded TiO2 nanotube arrays showed remarkable improvement of photochemical activity. The photocurrent of Cu-loaded sample soaked in 0.02 M Cu(NO3)2 solution was about 2.5 times higher than that of unloaded sample.

Effect of Anodization Bath Chemistry on Photochemical Water Splitting Using Titania Nanotubes

2004 ◽  
Vol 836 ◽  
Author(s):  
Gopal K. Mor ◽  
Oomman K. Varghese ◽  
Maggie Paulose ◽  
Karthik Shankar ◽  
Craig A. Grimes
Keyword(s):  
Water Splitting ◽  
Wall Thickness ◽  
Pore Diameter ◽  
Hydrogen Generation ◽  
Hydrogen Gas ◽  
Photoelectrochemical Cell ◽  
Nanotube Arrays ◽  
Titania Nanotube Arrays ◽  
Variable Wall Thickness ◽  
Variable Wall

ABSTRACTIn this study highly-ordered titania nanotube arrays of variable wall-thickness and length are used to photocleave water under ultraviolet irradiation. We demonstrate that the wall thickness, and length, of the nanotubes can be controlled via anodization bath composition and temperature. The nanotube length and wall thickness are key parameters influencing the magnitude of the photoanodic response and the overall efficiency of the water-splitting reaction. For 22 nm inner-pore diameter nanotube-arrays 6 μm in length, with 9 nm wall thickness, upon 320–400 nm illumination at an intensity of 100 mW/cm2, hydrogen gas was generated at the power-time normalized rate of 51 mL/hr•W at an overall conversion efficiency of 12.5%. To the best of our knowledge, this hydrogen generation rate is the highest reported for a titania-based photoelectrochemical cell.

Anodic ZrO2 Nanotube Arrays Formation by Anodisation in Ethylene Glycol with Varying Amount of Water

2017 ◽  
Vol 264 ◽  
pp. 224-227
Author(s):  
Nurulhuda Bashirom ◽  
Khairunisak Abdul Razak ◽  
Tan Wai Kian ◽  
Atsunori Matsuda ◽  
Zainovia Lockman
Keyword(s):  
Ethylene Glycol ◽  
Water Content ◽  
Wall Thickness ◽  
Nanotube Arrays ◽  
Outer Diameter ◽  
Transmission Electron Microcopy ◽  
Surface Etching ◽  
Transmission Electron

Anodisation of zirconium, Zr at 40 V for 60 min in 0.1 wt.% NH4F/ethylene glycol (EG) added to it 1 ml, 2 ml or 3 ml of water resulted in the formation of self-aligned ZrO2 nanotube (ZNT) arrays. Water content did not affect the length and diameter of the ZNTs but was influencing surface etching whereby better surface etching was observed for sample anodised in 3 ml-water/NH4F/EG. From transmission electron microcopy (TEM) image, the ZNTs were found to have an outer diameter of ~ 40 nm and wall thickness of 10 nm. Annealing at 400 °C was resulted in monoclinic (M-ZrO2) and tetragonal (T-ZrO2) formation, but at 600 °C M-ZrO2 dominates. Cr(VI) reduction is higher for ZNTs annealed at 400 °C compared to 600 °C sample.

A novel type of tubular structure with auxeticity both in radial direction and wall thickness

2021 ◽  
Vol 163 ◽  
pp. 107758
Author(s):  
Xiang Yu Zhang ◽  
Xin Yuan Wang ◽  
Xin Ren ◽  
Yi Min Xie ◽  
Yao Wu ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Radial Direction ◽  
Tubular Structure
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