Detailed photocatalytic study of alkaline titanates and its application for the degradation of methylene blue (MB) under solar irradiation

Rahman, Nur Ruzaina Abdul; Muniandy, Lingeswarran; Adam, Farook; Iqbal, Anwar; Ng, Eng-Poh; Lee, Hooi Ling

doi:10.1016/j.jphotochem.2019.02.020

Cited by 24 publications

(12 citation statements)

References 58 publications

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“…Most previous studies show a physical mode of action based on either sharp tips/spikes (e.g., black silicon) or sharp edges (graphene), but not on a combination of these two structures. A recent study by Ivanova et al indicates that having a mixed topography increases antibacterial performance. , These nanostructures, generating a very high surface area, are also expected to have very strong catalytic properties potentially valuable for applications other than bone implants …”

Section: Resultsmentioning

confidence: 99%

Advancing of Additive-Manufactured Titanium Implants with Bioinspired Micro- to Nanotopographies

Maher

Wijenayaka

Lima-Marques

et al. 2021

ACS Biomater. Sci. Eng.

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There is an increasing demand for low-cost and more efficient titanium (Ti) medical implants that will provide improved osseointegration and at the same time reduce the likelihood of infection. In the past decade, additive manufacturing (AM) using metal selective laser melting (SLM) or three-dimensional (3D) printing techniques has emerged to enable novel implant geometries or properties to overcome such potential challenges. This study presents a new surface engineering approach to create bioinspired multistructured surfaces on SLM-printed Ti alloy (Ti6Al4V) implants by combining SLM technology, electrochemical anodization, and hydrothermal (HT) processes. The resulting implants display unique surfaces with a distinctive dual micro- to nano-topography composed of micron-sized spherical features, fabricated by SLM and vertically aligned nanoscale pillar structures as a result of combining anodization and HT treatment. The fabricated implants enhanced hydroxyapatite-like mineral deposition from simulated body fluid (SBF) compared to control. In addition, normal human osteoblast-like cells (NHBCs) showed strong adhesion to the nano-/microstructures and displayed greater propensity to mineralize compared to control surfaces. This engineering approach and the resulting nature-inspired multiscale-structured surface offers desired features for improving osseointegration and antibacterial performance toward the development of next-generation orthopedic and dental implants.

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Section: Resultsmentioning

confidence: 99%

Advancing of Additive-Manufactured Titanium Implants with Bioinspired Micro- to Nanotopographies

Maher

Wijenayaka

Lima-Marques

et al. 2021

ACS Biomater. Sci. Eng.

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“…Furthermore, it can also be observed that the use of alkali metal hydroxides had a strong impact on the topography of TiO 2 during the alkaline treatment of titanate nanomaterials. The use of several alkali metal hydroxides, such as NaOH, LiOH, KOH and CsOH, via the conventional hydrothermal approach, leads to get different titania forms such as nanoribbons (Na 2 Ti 6 O 13 monoclinic phase), pallet‐like structures (Li 8 Ti 14 O 36 cube phase), nanowire structures (K 2 Ti 16 O 13 mono‐clinical phase) and agglomerates of spherical particles (lepidocrocite Cs 0.68 Ti 1.83 O 4 ), respectively …”

Section: Preparation Of Tintsmentioning

confidence: 99%

Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

Ameur

Bachir

2020

ChemistrySelect

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This paper represents a general study of titanate nanotubes (TiNTs) which are among the most important materials in the field of catalysis. This research work covers more than 100 publications about the formulation, characterisation and most recent applications of TiNTs. TiNTs can be prepared by different methods, namely the anodic deposition, sol-gel template synthesis and alkaline hydrothermal treatment. The present study focuses on the preparation of this tubular structure by alkaline treatment, using the latest and most recent processes that have been introduced in this method (stirring, acid nature, annealing temperature, etc). The surface properties, such as the point of zero charge (P.Z.C), acid-base nature and light absorption, of TiNTs are also evoked. In the end, some recent and important TiNTs applications in the field of renewable energies are reported (H 2 production and methanation). In addition, NO reduction, CO oxidation, photocatalysis and organic synthesis are also mentioned. Therefore, it may be said that this paper is a structured study about TiNTs for the purpose of making the reader aware of their importance, understand their synthesis, and know their scope of applications. To conclude, the most important data, acquired through various characterization techniques, are provided.[a] Dr.

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“…The photocatalytic activity of TNTs was tested with methylene blue (MB), which is a commonly used substance for that kind of process [55,56]. First, 10 mg of sample (S1, S2) was dispersed in 130 mL of 20 mg/L MB water solution with a pH value of 7 at room temperature.…”

Section: Photocatalytic Examinationmentioning

confidence: 99%

The Use of Ultra-Small Fe3O4 Magnetic Nanoparticles for Hydrothermal Synthesis of Fe3+-Doped Titanate Nanotubes

et al. 2020

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A method of the hydrothermal synthesis of Fe3+-doped titanate nanotubes (TNT) is reported in which the ultra-small Fe3O4 nanoparticles are used as the sources of Fe3+ ions. The magnetic nanoparticles with a diameter of about 2 nm are added during the washing stage of the hydrothermal procedure. During washing, they gradually degrade and at the same time, the titanate product is transformed into nanotubes. The obtained nanotubes were characterized by structural and magnetic measurements. It was found that, depending on the value of the external magnetic field, they may show the property of room temperature ferromagnetism, paramagnetism or they may be diamagnetic. It was also shown that the modified TNTs have greater photocatalytic activity compared to unmodified TNTs.

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Detailed photocatalytic study of alkaline titanates and its application for the degradation of methylene blue (MB) under solar irradiation

Cited by 24 publications

References 58 publications

Advancing of Additive-Manufactured Titanium Implants with Bioinspired Micro- to Nanotopographies

Advancing of Additive-Manufactured Titanium Implants with Bioinspired Micro- to Nanotopographies

Study of 1D Titanate‐Based Materials –New Modification of the Synthesis Procedure and Surface Properties‐Recent Applications

The Use of Ultra-Small Fe3O4 Magnetic Nanoparticles for Hydrothermal Synthesis of Fe3+-Doped Titanate Nanotubes

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