TiO2CoxOy composite nanotube arrays via one step electrochemical anodization for visible light–induced photocatalytic reaction

Kobylański, Marek P.; Mazierski, Paweł; Malankowska, Anna; Kozak, Magda; Diak, Magdalena; Winiarski, Michał J.; Klimczuk, Tomasz; Lisowski, Wojciech; Nowaczyk, Grzegorz

doi:10.1016/j.surfin.2018.06.001

Cited by 12 publications

(19 citation statements)

References 54 publications

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“…The difference in the photocatalytic properties of ZnO synthesised from different precursors can be attributed to the different nature of defects in ZnO formed in these synthetic approaches: some kinds of the oxygen vacancies ( Our experience for PhOH degradation in the presence of set of photocatalysts (P25, ZnO) but without oxygen in reaction medium occurs only up to 20% that is very good agreements with other studies [57]. The crucial role of O 2-in PhOH degradation are described in many work [58,59] and it may be present as electron scavenger for enhanced of charge separation in PC and also as the oxidative agent for PhOH and different intermediates. The interaction of the formed centres with the water molecule leads to the generation of other forms of active oxygen -peroxide and hydroxyl radicals, which can diffuse from the surface into the solution, (ZnO/O 2 -…H 2 O = H 2 O 2 (2OH⋅) or ZnO/ O-….H 2 O = OH-(OH⋅)) and participate in the reactions of phenol oxidation (PhOH….ZnO = CO 2 + H 2 O).…”

Section: Photocatalytic Activity Of Znosupporting

confidence: 84%

Photocatalytic activity of ZnO nanopowders: The role of production techniques in the formation of structural defects

et al. 2019

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The effect of the type of structural defect in zinc oxide on its photocatalytic properties was studied for phenol photodegradation under UV-irradiation. It was shown that the use of different types of precursors (zinc oxalate and zinc hydroxide) for the production of zinc oxide leads to the formation of a material with the same phase composition and equal energy of the forbidden band, but different photocatalytic activities. Simultaneously, the peculiarities of the luminescence and electron spin resonance spectra indicate the formation of different types of defects in the structure of the material, namely, oxygen vacancies (V o) in the anionic and zinc vacancies (V Zn) in the cationic sublattices of zinc oxide synthesised from the zinc oxalate and hydroxide, respectively. Also, the different characteristics of the luminescence decays reveal the different recombination paths for the free charge carriers in the systems synthesised from the different precursors. The different times of the luminescence decay also confirmed the different methods of recombination of free charge carriers in systems synthesised from different precursors. It was shown that the appearance of defects in the cationic sublattice leads to a decrease in the photocatalytic activity of the material relative to phenol degradation. Recently, several reviews have been published on the photocatalytic

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Section: Photocatalytic Activity Of Znosupporting

confidence: 84%

Photocatalytic activity of ZnO nanopowders: The role of production techniques in the formation of structural defects

et al. 2019

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“…On the contrary, the second approach allows the distribution of the cobalt (II, III) oxides in the interior of the TiO2 that would prevail over the above issue and enhance the composite material performance. More recently, Wang et al [ 201 ] and Kobylański et al [ 202 ] examined the fabrication and characterization of Co3O4-doped TiO2 NTs electrodes and TiO2-Co x O y composite NTs via a single-step electrochemical anodization process for visible-light-induced photocatalytic reaction, respectively. The diameter, and length of the MONs are almost unchanged with the increase of Co content, thus the diameter and length of the TiO2, TiO 2 –3%Co, TiO 2 –6%Co, and TiO 2 –9%Co nanotubes are around 61.9 nm and 1.7 μm, 57.5 nm and 1.6 μm, 57.9 nm and 1.6 μm, and 55.0 nm and 1.6 μm, respectively [ 201 ].…”

Section: Comparison Between Mono and Mixed Oxide Nanotubesmentioning

confidence: 99%

“…Besides, the thickness of MONs layer has somewhat reduced from 2.3 to 2.0. This shows that higher H2O content leads to the development of MONs with a lower surface area and less photoactivity [ 202 ] ( Fig. 10 a-c).…”

Section: Comparison Between Mono and Mixed Oxide Nanotubesmentioning

confidence: 99%

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Sarraf

Yeong

Hosseini

et al. 2021

Ceramics International

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Nanomedicine has seen a significant rise in the development of new research tools and clinically functional devices. In this regard, significant advances and new commercial applications are expected in the pharmaceutical and orthopedic industries. For advanced orthopedic implant technologies, appropriate nanoscale surface modifications are highly effective strategies and are widely studied in the literature for improving implant performance. It is well-established that implants with nanotubular surfaces show a drastic improvement in new bone creation and gene expression compared to implants without nanotopography. Nevertheless, the scientific and clinical understanding of mixed oxide nanotubes (MONs) and their potential applications, especially in biomedical applications are still in the early stages of development. This review aims to establish a credible platform for the current and future roles of MONs in nanomedicine, particularly in advanced orthopedic implants. We first introduce the concept of MONs and then discuss the preparation strategies. This is followed by a review of the recent advancement of MONs in biomedical applications, including mineralization abilities, biocompatibility, antibacterial activity, cell culture, and animal testing, as well as clinical possibilities. To conclude, we propose that the combination of nanotubular surface modification with incorporating sensor allows clinicians to precisely record patient data as a critical contributor to evidence-based medicine.

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“…Furthermore, the electrochemical method of NT preparation is simple, repeatable, and low-cost [5], and it allows the nanotube dimension to be controlled by differing the process conditions. Additionally, it allows ordered NTs characterized by a highly developed surface area and high stability to be obtained during photocatalytic processes, as well as representing a possibility of regeneration after photocatalytic tests [16].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Durable Ordered Ta2O5 Nanotube Arrays Decorated with Bi2S3 Quantum Dots

et al. 2019

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One of the most important challenges in the fabrication of ordered tantalum pentaoxide (Ta2O5) nanotube arrays (NTs) via the electrochemical method is the formation of nanotubes that adhere well to the Ta substrate. In this paper, we propose a new protocol that allows tight-fitting Ta2O5 nanotubes to be obtained through the anodic oxidation of tantalum foil. Moreover, to enhance their activity in the photocatalytic reaction, in this study, they have been decorated by nontoxic bismuth sulfide (Bi2S3) quantum dots (QDs) via a simple successive ionic layer adsorption and reaction (SILAR) method. Transmission electron microscopy (TEM) analysis revealed that quantum dots with a size in the range of 6–11 nm were located both inside and on the external surfaces of the Ta2O5 NTs. The effect of the anodization time and annealing conditions, as well as the effect of cycle numbers in the SILAR method, on the surface properties and photoactivity of Ta2O5 nanotubes and Bi2S3/Ta2O5 composites have been investigated. The Ta2O5 nanotubes decorated with Bi2S3 QDs exhibit high photocatalytic activity in the toluene degradation reaction, i.e., 99% of toluene (C0 = 200 ppm) was degraded after 5 min of UV-Vis irradiation. Therefore, the proposed anodic oxidation of tantalum (Ta) foil followed by SILAR decorating allows a photocatalytic surface, ready to use for pollutant degradation in the gas phase, to be obtained.

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TiO2CoxOy composite nanotube arrays via one step electrochemical anodization for visible light–induced photocatalytic reaction

Cited by 12 publications

References 54 publications

Photocatalytic activity of ZnO nanopowders: The role of production techniques in the formation of structural defects

Photocatalytic activity of ZnO nanopowders: The role of production techniques in the formation of structural defects

Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future?

Fabrication of Durable Ordered Ta2O5 Nanotube Arrays Decorated with Bi2S3 Quantum Dots

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