Fabrication of magnetic Fe3O4/C/TiO2 composites with nanotube structure and enhanced photocatalytic activity

Liu, Y.; Wan, Jiafeng; Liu, C.-T.; Li, Y.-B.

doi:10.1179/1743284715y.0000000089

Cited by 9 publications

(5 citation statements)

References 60 publications

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“…-collection and analysis of theoretical material. 3 Al-Hassani A.J. -collection and analysis of theoretical material, preparation of materials for publication.…”

Section: Contribution Of the Authorsmentioning

confidence: 99%

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Formation of CdSe/CdS/ZnS Quantum Dots Floating Monolayers on the NiCl2 Containing Subphase

Al-Alwani¹,

Mironyuk²,

Al-Hassani³

et al. 2021

Liq. Cryst. and their Appl.

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The development of low-defect self-organizing thin film materials is one of the most important directions of modern optoelectronics. For this purpose, the formation and stability of quantum dots (QDs) floating monolayers on the composition (pure water or NiCl 2 aqueous solutions) and temperature (19 and 25 °C) of subphase have been investigated. The studied quantum dots were CdSe/CdS/ZnS (core/shell/shell) stabilized by oleic acid.The data on -A isotherms, hysteresis, and stability of QDs floating monolayers were analyzed. It was found that the monolayer formed on the pure water subphase is more stable. It was established that the increase of NiCl 2 content in the aqueous subphase (from 1 to 5 mM) leads to the decrease of the gas phase region and the increase of the liquid and condensed phase regions on π-A isotherms. It was suggested that Ni 2+ cation interacts with the carboxylic groups of free (unbounded to QDs) oleic acid molecules. As a result, the density of floating layer and the compression module values increased. The highest compression modulus values of QDs floating monolayers were found for the 5 mM NiCl 2 containing subphase. On the basis of the studied floating layers, thin films were obtained on silicon substrates, and their surface was investigated by the AFM method. It was determined that the presence of NiCl 2 in the aqueous subphase leads to an increase in the thicknesses and hydrophobicity of the prepared thin films. The obtained data can be used at the formation of multicomponent thin film nanomaterials containing quantum dots.

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“…-collection and analysis of theoretical material. 3 Al-Hassani A.J. -collection and analysis of theoretical material, preparation of materials for publication.…”

Section: Contribution Of the Authorsmentioning

confidence: 99%

“…Currently, Langmuir-Blodgett (LB) technique is used to create materials for optoelectronic devices such as solar cells [1][2][3]. The main idea of the technique is the self-organization of amphiphilic (surfactant) molecules at the water-air interface giving objects with a high degree of structural perfection.…”

Section: Introductionmentioning

confidence: 99%

Formation of CdSe/CdS/ZnS Quantum Dots Floating Monolayers on the NiCl2 Containing Subphase

Al-Alwani¹,

Mironyuk²,

Al-Hassani³

et al. 2021

Liq. Cryst. and their Appl.

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“…To further enhance the photocatalytic performance of TiO 2based nanomaterials and also to extend the light absorption in the visible spectral region, Fe 3 O 4 nanoparticles (NPs) were incorporated into TiO 2 -based nanomaterials (Liu et al, 2016;Bi et al, 2019;Yilmaz et al, 2020). Apart from the more favorable light absorption, this enhancement can be attributed to the efficient separation of h + and e − , which occurs by reducing iron ions into Fe 2+ or Fe 0 (Li et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of naproxen using TiO2 single nanotubes

Sepúlveda,

Musiał,

Saldan

et al. 2024

Front. Environ. Chem.

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Herein, TiO2 single-tube (TiO2 ST-NT) powders with and without magnetite Fe3O4 nanoparticles (TiO2 ST-NT@Fe3O4NPs) are presented for the first time as excellent photocatalysts for the degradation of one of the most popular non-steroidal anti-inflammatory drugs (NSAIDs), naproxen (NPX). The TiO2 ST-NT powders were synthesized by anodization followed by etching of the double wall, bending, sonication, ultra-centrifugation, and finally annealing at 600°C. A part of the obtained TiO2 ST-NT powders was decorated with Fe3O4 nanoparticles using a simple one-step decoration process. The best photocatalytic performance of TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders was obtained under the white light (6.2 × 10−4 s-1) and the blue light (2.7 × 10−4 s-1), respectively. During NPX photodegradation using TiO2 ST-NT powders, three main NPX transformation products (P1, P2, and P3) were detected. Upon excitation with the blue light illumination, TiO2 ST-NT@ Fe3O4NPs powders exhibited higher performance (∼80%) than TiO2 ST-NT powders (∼23%) within 1 h, resulting in an approximately three times increased photocatalytic rate constant. Moreover, under simulated sunlight conditions, TiO2 ST-NT powders demonstrated remarkable activity, achieving a 94% NPX degradation within 1 h. TiO2 ST-NT and TiO2 ST-NT@Fe3O4NPs powders represent excellent photocatalysts for NPX degradation.

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“…Hence, the photocatalytic application of TiO 2 at an industrial scale has been limited because only 4-5% of the solar spectrum corresponds to UV photons. Therefore, strong efforts have been devoted to activating the TiO 2 toward the visible and solar light for application purposes [1,2]. One of the approaches for attainment of this issue is dye sensitization, i.e., the adsorption of dyes especially phthalocyanines on the TiO 2 surface [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Shift the Photocatalytic Activity of P25 TiO2 Nanoparticles toward the Visible Region upon Surface Modification with Organic Hybrid of Phosphotungstate

Taghdiri

Doolabi

2020

International Journal of Photoenergy

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In this study, a visible-light-driven P25 TiO2 was prepared upon surface modification with a colored organic hybrid of phosphotungstic acid that makes titanium dioxide suitable for photocatalytic degradation of organic pollutants under visible and sunlight irradiation. Visible shifting of the photocatalytic activity of surface-modified TiO2 was examined by studying the decolorization of methylene blue (MB) and rhodamine B (RhB). The results show that colored TiO2 is, unlike bare TiO2, a good photocatalyst in the degradation of dyes under visible and sunlight irradiation. Surface-modified Al2O3 and reduced graphene oxide (RGO) with organic hybrid of phosphotungstate failed to degrade RhB under sunlight irradiation, which prove the role of TiO2 in the photochemical process.

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Fabrication of magnetic Fe₃O₄/C/TiO₂ composites with nanotube structure and enhanced photocatalytic activity

Cited by 9 publications

References 60 publications

Formation of CdSe/CdS/ZnS Quantum Dots Floating Monolayers on the NiCl2 Containing Subphase

Formation of CdSe/CdS/ZnS Quantum Dots Floating Monolayers on the NiCl2 Containing Subphase

Photocatalytic degradation of naproxen using TiO2 single nanotubes

Shift the Photocatalytic Activity of P25 TiO2 Nanoparticles toward the Visible Region upon Surface Modification with Organic Hybrid of Phosphotungstate

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