scholarly journals Capacitive performance of vertically aligned reduced titania nanotubes coated with Mn2O3 by reverse pulse electrodeposition

RSC Advances ◽  
2018 ◽  
Vol 8 (41) ◽  
pp. 23040-23047 ◽  
Author(s):  
Nurul Asma Samsudin ◽  
Zulkarnain Zainal ◽  
Hong Ngee Lim ◽  
Yusran Sulaiman ◽  
Sook-Keng Chang ◽  
...  
Keyword(s):  
Titania Nanotubes ◽  
Pulse Electrodeposition ◽  
Capacitive Performance ◽  
Reverse Pulse ◽  
Vertically Aligned

Mn2O3 was coated onto reduced titania nanotubes by reverse pulse electrodeposition, showing smooth and homogenous deposits without covering the opening of the nanotubes.

scholarly journals Enhanced capacitive performance of cathodically reduced titania nanotubes pulsed deposited with Mn2O3 as supercapacitor electrode

RSC Advances ◽  
2021 ◽  
Vol 11 (43) ◽  
pp. 26700-26709
Author(s):  
Muhammad Muhammad Muzakir ◽  
Zulkarnain Zainal ◽  
Hong Ngee Lim ◽  
Abdul Halim Abdullah ◽  
Noor Nazihah Bahrudin
Keyword(s):  
Electrochemical Performance ◽  
Titania Nanotubes ◽  
Pulse Electrodeposition ◽  
Mass Loading ◽  
Supercapacitor Electrode ◽  
Capacitive Performance

The mass loading of Mn2O3 by pulse electrodeposition (PED) onto reduced titania nanotubes (R-TNTs) greatly influences the electrochemical performance of the composite.

scholarly journals Enhancement of Capacitive Performance in Titania Nanotubes Modified by an Electrochemical Reduction Method

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Nurul Asma Samsudin ◽  
Zulkarnain Zainal ◽  
Hong Ngee Lim ◽  
Yusran Sulaiman ◽  
Sook-Keng Chang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Reduction ◽  
Photoelectron Spectroscopy ◽  
Oxygen Vacancies ◽  
Reduction Method ◽  
Titania Nanotubes ◽  
Electrochemical Anodization ◽  
Constant Current ◽  
Cyclic Voltammogram ◽  
Capacitive Performance

Highly ordered titania nanotubes (TNTs) were synthesised by an electrochemical anodization method for supercapacitor applications. However, the capacitive performance of the TNTs was relatively low and comparable to the conventional capacitor. Therefore, in order to improve the capacitive performance of the TNTs, a fast and facile electrochemical reduction method was applied to modify the TNTs (R-TNTs) by introducing oxygen vacancies into the lattice. X-ray photoelectron spectroscopy (XPS) data confirmed the presence of oxygen vacancies in the R-TNTs lattice upon the reduction of Ti4+ to Ti3+. Electrochemical reduction parameters such as applied voltage and reduction time were varied to optimize the best conditions for the modification process. The electrochemical performance of the samples was analyzed in a three-electrode configuration cell. The cyclic voltammogram recorded at 200 mV s−1 showed a perfect square-shaped voltammogram indicating the excellent electrochemical performance of R-TNTs prepared at 5 V for 30 s. The total area of the R-TNTs voltammogram was 3 times larger than the unmodified TNTs. A specific capacitance of 11.12 mF cm−2 at a current density of 20 μA cm−2 was obtained from constant current charge-discharge measurements, which was approximately 57 times higher than that of unmodified TNTs. R-TNTs also displayed outstanding cycle stability with 99% capacity retention after 1000 cycles.

Reverse pulse electrodeposition of Zn–Ni alloys from a chloride bath

2009 ◽  
Vol 487 (1-2) ◽  
pp. 479-482 ◽  
Author(s):  
Yuttanant Boonyongmaneerat ◽  
Sawalee Saenapitak ◽  
Kanokwan Saengkiettiyut
Keyword(s):  
Pulse Electrodeposition ◽  
Ni Alloys ◽  
Reverse Pulse

scholarly journals Influence of Double-Pulse Electrodeposition Parameters on the Performance of Nickel/Nanodiamond Composite Coatings

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1068
Author(s):  
Dongai Wang ◽  
Meihua Liu ◽  
Yuanmin Zhu ◽  
Feihui Li
Keyword(s):  
Duty Cycle ◽  
Composite Coatings ◽  
Research Work ◽  
Working Time ◽  
Double Pulse ◽  
Pulse Electrodeposition ◽  
Composite Plating ◽  
Surface Micromorphology ◽  
Reverse Pulse ◽  
Plating Solution

In this study, using 45# carbon steel as the substrate, a first experimental analysis was carried out on the polarisation behaviour of different component wattage plating solutions in order to determine the reasonable content of nanodiamond particles in a nickel/nanodiamond composite plating solution. Secondly, the effect of double-pulse forward and reverse duty cycle and reverse working time on the performance of nickel/nanodiamond composite plating was then investigated by testing the thickness, hardness and surface roughness of the composite plating and observing the surface micromorphology. The experimental results show that, when the content of nanodiamond particles in the plating solution is 5 g/L, the anti-pulse working time, forward and reverse pulse duty cycle of the double-pulse plating parameters are 20, 0.3 and 0.2 ms, respectively, and the composite plating layer prepared by double pulse has good comprehensive performance. This research work provides technical support for the optimisation of process parameters for the preparation of nickel/nanodiamond composite coatings by double-pulse electrodeposition.

Experimental and Theoretical Comparable Study of Pure and Zinc Porphyrin Surface Modified ZnO Nanorod Arrays for Hybrid Solar Cell Applications

2020 ◽  
pp. 114-119
Keyword(s):  
Solar Cell ◽  
Electrochemical Impedance ◽  
Hybrid Solar Cell ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Annealing Effects ◽  
Vertically Aligned ◽  
Surface Modified

Experimental and theoretical study Porphyrin-grafted ZnO nanowire arrays were investigated for organic/inorganic hybrid solar cell applications. Two types of porphyrin – Tetra (4-carboxyphenyle) TCPP and meso-Tetraphenylporphine (Zinc-TPP)were used to modify the nanowire surfaces. The vertically aligned nanowires with porphyrin modifications were embedded in graphene-enriched poly (3-hexylthiophene) [G-P3HT] for p-n junction nanowire solar cells. Surface grafting of ZnO nanowires was found to improve the solar cell efficiency. There are different effect for the two types of porphyrin as results of Zn existing. Annealing effects on the solar cell performance were investigated by heating the devices up to 225 °C in air. It was found that the cell performance was significantly degraded after annealing. The degradation was attributed to the polymer structural change at high temperature as evidenced by electrochemical impedance spectroscopy measurements.

Photovoltaic Properties of CdTe Nanoparticles-Decorated Titania Nanotubes Arrays

2008 ◽  
Author(s):  
Latika Menon ◽  
Eugen Panaitescu ◽  
Dattatri Nagesha ◽  
Trifon Fitchorov ◽  
John S. Morris ◽  
...  
Keyword(s):  
Titania Nanotubes ◽  
Photovoltaic Properties ◽  
Cdte Nanoparticles

Fabrication of Carbon Nanotube Triode Using Helicon Plasma Cvd with Electroplated Nico Catalyst

2003 ◽  
Vol 772 ◽  
Author(s):  
Masakazu Muroyama ◽  
Kazuto Kimura ◽  
Takao Yagi ◽  
Ichiro Saito
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metal Catalyst ◽  
Ni Catalyst ◽  
Plasma Cvd ◽  
Helicon Plasma ◽  
Plasma Enhanced Cvd ◽  
Turn On ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

AbstractA carbon nanotube triode using Helicon Plasma-enhanced CVD with electroplated NiCo catalyst has been successfully fabricated. Isolated NiCo based metal catalyst was deposited at the bottom of the cathode wells by electroplating methods to control the density of carbon nanotubes and also reduce the activation energy of its growth. Helicon Plasma-enhanced CVD (HPECVD) has been used to deposit nanotubes at 400°C. Vertically aligned carbon nanotubes were then grown selectively on the electroplated Ni catalyst. Field emission measurements were performed with a triode structure. At a cathode to anode gap of 1.1mm, the turn on voltage for the gate was 170V.

Sign in / Sign up

Export Citation Format

Share Document