Diameter-dependent electrochemical supercapacitive properties of anodized titanium oxide nanotubes

Al-Osta, Ahmed; Jadhav, Vijaykumar V.; Saad, Nabil A.; Mane, Rajaram S.; Naushad, Mu.; Hui, Kwun Nam; Han, Sung‐Hwan

doi:10.1016/j.scriptamat.2015.03.025

Cited by 11 publications

(2 citation statements)

References 29 publications

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“…The voltammetric response on the Ti/Ta 2 O 5 -IrO 2 electrode at different scan rates is shown in Figure 11a. The CV curves at all scan rates remained closed, indicating that surface charge had enough time to access the entire solution at both high and low scan rates [50]. Due to pseudo-capacitive behavior, redox peaks were seen in the CV curves [51].…”

Section: Resultsmentioning

confidence: 99%

Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

Zhao

Zhang

Chen³

et al. 2019

IJERPH

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The widely used sulfonylurea herbicides have caused negative effects on the environment and human beings. Electrochemical degradation has attracted much attention in the treatment of refractory organic compounds due to its advantage of producing no secondary pollution. Three kinds of IrO2-based dimensionally stable anodes (DSAs) were used to degrade nicosulfuron by a batch electrochemical process. The results showed that a well-distributed crack network was formed on the Ti/Ta2O5-IrO2 electrode and Ti/Ta2O5-SnO2-IrO2 electrode due to the different coefficients of thermal expansion between the Ti substrate and oxide coatings. The oxygen evolution potential (OEP) increased according to the order of Ti/RuO2-IrO2 < Ti/Ta2O5-SnO2-IrO2 < Ti/Ta2O5-IrO2. Among the three electrodes, the Ti/Ta2O5-IrO2 electrode showed the highest efficiency and was chosen as the experimental electrode. Single factor experiments were carried out to obtain the optimum electrolysis condition, shown as follows: currency intensity 0.8 A; electrode spacing 3 cm, electrolyte pH 3. Under the optimum conditions, the degradation of nicosulfuron followed first-order kinetics and was mainly due to indirect electrochemical oxidation. It was a typical diffusion-controlled electrochemical process. On the basis of the intermediate identified by high performance liquid chromatograph-mass spectrometry (HPLC-MS), two possible degradation routes were proposed.

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Section: Resultsmentioning

confidence: 99%

Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

Zhao

Zhang

Chen³

et al. 2019

IJERPH

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“…Supercapacitors are important energy storage devices due to their high-power density, longer life cycle, and have bridged the performance gap between traditional dielectric capacitors and batteries/fuel cells in terms of power and energy densities [4]. They are categorized into two main classes, namely, electrochemical double layer capacitors (EDLCs) in which the charge separation takes place at the interface between electrode and electrolyte and pseudo-capacitors, which is due to the fast Faradaic redox reactions that take place at the surface of active electrode materials [5]. The performance of the supercapacitors depends tremendously on the physicochemical behaviors of their electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Electrochemically Reduced Titania Nanotube Synthesized from Glycerol-Based Electrolyte as Supercapacitor Electrode

Muzakir¹,

Zainal²,

Lim³

et al. 2020

Energies

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In this paper the synthesis of self-organized Titania nanotubes (TNTs) by a facile potentiostatic anodization in a glycerol-based electrolyte is reported. The optimized TNTs were subsequently reduced through a cathodic reduction process to enhance its capacitive performance. FESEM and XRD were used to characterize the morphology and crystal structure of the synthesized samples. XPS analysis confirmed the reduction of Ti4+ to Ti3+ ions in the reduced Titania nanotubes (R-TNTs). The tube diameter and separation between the tubes were greatly influenced by the applied voltage. TNTs synthesized at voltage of 30 V for 60 min exhibited 86 nm and 1.1 µm of tube diameter and length, respectively and showed high specific capacitance of 0.33 mF cm−2 at current density of 0.02 mA cm−2. After reduction at 5 V for 30 s, the specific capacitance increased by about seven times (2.28 mF cm−2) at 0.5 mA cm−2 and recorded about 86% capacitance retention after 1000 continuous cycling at 0.2 mA cm−2, as compared to TNTs, retained about 61% at 0.01 mA cm−2. The charge transfer resistance drastically reduced from 6.2 Ω for TNTs to 0.55 Ω for R-TNTs, indicating an improvement in the transfer of electrons and ions across the electrode–electrolyte interface.

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Molybdenum-Loaded Anatase TiO2 Nanoparticles With Enhanced Optoelectronics Properties

Bargougui

Ammar

Azzouz

2016

Journal of Elec Materi

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Diameter-dependent electrochemical supercapacitive properties of anodized titanium oxide nanotubes

Cited by 11 publications

References 29 publications

Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

Electrochemically Reduced Titania Nanotube Synthesized from Glycerol-Based Electrolyte as Supercapacitor Electrode

Molybdenum-Loaded Anatase TiO2 Nanoparticles With Enhanced Optoelectronics Properties

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