Effect of Carbon Nanotubes and Carbon Nanotubes/Gold Nanoparticles Composite on the Photocatalytic Activity of TiO2 and TiO2‐SiO2

Chinh, Vu Đuc; Hưng, Lê Xuân; Palma, Luca Di; Hanh, Vu Thi Hong; Vilardi, Giorgio

doi:10.1002/ceat.201800265

Cited by 37 publications

(15 citation statements)

References 25 publications

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“…Schematic diagram showing the electron transfer mechanism from different energy levels of the Graphene-Au/TiO 2 heterostructure for the photo-reduction. A similar mechanism was reported by Chinh et al [22].…”

Section: Iii2 Photodegradation Of Methylene Bluesupporting

confidence: 85%

Effect of Graphene-Gold Nanocomposites on the Photocatalytic Activity Of TiO\(_2\)

Chinh

Nguyen²,

Binh³

et al. 2020

Comm. in Phys.

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The synthesis of graphene (Gr) - gold (Au) nanoparticle (NP) composite was achieved using continuous ultraviolet wave exposure. The functional groups were investigated with FT-IR spectra. From the Raman spectra, D-band and G-band of graphene were identified. As a result, the uniform deposition of nanometer-sized Au NPs on the graphene sheets was observed from the field emission scanning electron microscope (FE-SEM) images. The photodegradation of methylene blue in aqueous solutions is studied using various photocatalysts, including neat TiO2, Gr/TiO2 and Gr-Au/TiO2 composites. The Gr weight ratio in this research is 2%. The Gr2%-Au0.1%/TiO2 composite had the highest photoactivity.

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Section: Iii2 Photodegradation Of Methylene Bluesupporting

confidence: 85%

Effect of Graphene-Gold Nanocomposites on the Photocatalytic Activity Of TiO\(_2\)

Chinh

Nguyen²,

Binh³

et al. 2020

Comm. in Phys.

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“…Methylene blue (MB) and malachite green (MG) are cationic dyes widely used in the dyeing of cotton, leather, silk and paper. [33,34] In addition, MG is the most effective fungicide in the fight against saprolegia (a very common disease in aquaculture). [35] The treatment of such industrial waste is of great interest.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

Ameur

Brahimi²,

Bensaada³

et al. 2020

ChemistrySelect

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The present work aims to study the anticorrosion and the photodegradation properties of titanate nanotubes (TiNTs) and vanadium doped-titanate nanotubes (V-TiNTs). Moreover, this article seeks to investigate the effect of doping TiNTs by vanadium species at different amount (2, 5 and 10 wt %). The raw materials (i.e:TiO 2 and V 2 O 5-TiO 2) are obtained by a sol gel process, while the hydrothermal treatment is chosen to achieve the hollow structure. The structural evolutions and morphological characteristics of materials have performed using various techniques such as: Scanning Electron Microscopy and Energy Dispersive X-ray (MEB/EDS), X-ray diffraction (XRD), UV-Visible in Reflection Diffuse spectroscopy (RD/UV-Vis) and Fourier Transform InfraRed spectroscopy (FTIR) analysis. However , the anticorrosion properties of the synthesized nanotubes are evaluated on mild steel corrosion in 1 N HCl using a weight loss method. All materials showed a potential inhibitor effect (up to 90 %) depending on the vanadium percentage and the inhibitor concentration. The photodegradation activity of the prepared materials is evaluated in the photodegradation of two organic pollutants: Methylene Blue (MB) and Malachite Green (MG) under UV-Visible irradiation. The obtained results underlined the improvement of photocatalytic activity of TiNTs by vanadium species. A conversion rate up to 96 % is achieved at reduced time. Therefore, the prepared materials could be suitable for the anticorrosion of mild steel and the photodegradation of organic pollutants.

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“…These results indicate that the degradation efficiencies of Cu II O, NP-3, and the composite NPs are competitive with those of TiO 2 -based catalysts [ 19 , 28 ], especially taking into consideration that the latter ones operate under UV irradiation while the heterogeneous photo-Fenton catalysts utilize visible light.…”

Section: Resultsmentioning

confidence: 99%

“…TiO 2 has a disadvantage of an inherently wide band gap (3.2 eV), which makes it able to utilize only a small portion (4%) of the solar spectrum. Application of composites, such as TiO 2 -SiO 2 [ 18 ], CNT/TiO 2 , CNT/TiO 2 -SiO 2 , Au/TiO 2 , CNT-Au/TiO 2 , and CNT-Au/TiO 2 -SiO 2 (where CNT stands for carbon nanotubes), resulted in synergistic effects on the photocatalytic performance of the individual components [ 19 ]. Copper oxide (Cu II O) is a p-type semiconductor [ 20 ] that forms monoclinic crystals resulting in specific physical properties, i.e., spin dynamics, electron correlation effects, and high temperature superconductivity.…”

Section: Introductionmentioning

confidence: 99%

Comparing the Degradation Potential of Copper(II), Iron(II), Iron(III) Oxides, and Their Composite Nanoparticles in a Heterogeneous Photo-Fenton System

2021

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Heterogeneous photo-Fenton systems offer efficient solutions for the treatment of wastewaters in the textile industry. This study investigated the fabrication and structural characterization of novel peculiar-shaped CuIIO, FeIII2O3, and FeIIO nanoparticles (NPs) compared to the properties of the iron(II)-doped copper ferrite CuII0.4FeII0.6FeIII2O4. The photocatalytic efficiencies of these NPs and the composite of the simple oxides (CuIIO/FeIIO/FeIII2O3) regarding the degradation of methylene blue (MB) and rhodamine B (RhB) as model dyes were also determined. The catalysts were synthesized via simple co-precipitation and calcination technique. X-ray diffractometry (XRD), scanning electron microscopy (SEM), and diffuse reflectance spectroscopy (DRS) were utilized for structural characterization. The structure of CuIIO was bead-like connected into threads, FeIII2O3 was rod-like, while FeIIO pallet-like, with average crystallite sizes of 18.9, 36.9, and 37.1 nm, respectively. The highest degradation efficiency was achieved by CuIIO for RhB and by CuII0.4FeII0.6FeIII2O4 for MB. The CuIIO/FeIIO/FeIII2O3 composite proved to be the second-best catalyst in both cases, with excellent reusability. Hence, these NPs can be successfully applied as heterogeneous photo-Fenton catalysts for the removal of hazardous pollutants. Moreover, the simple metal oxides and the iron(II)-doped copper ferrite displayed a sufficient antibacterial activity against Gram-negative Vibrio fischeri.

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Effect of Carbon Nanotubes and Carbon Nanotubes/Gold Nanoparticles Composite on the Photocatalytic Activity of TiO₂ and TiO₂‐SiO₂

Cited by 37 publications

References 25 publications

Effect of Graphene-Gold Nanocomposites on the Photocatalytic Activity Of TiO\(_2\)

Effect of Graphene-Gold Nanocomposites on the Photocatalytic Activity Of TiO\(_2\)

Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

Comparing the Degradation Potential of Copper(II), Iron(II), Iron(III) Oxides, and Their Composite Nanoparticles in a Heterogeneous Photo-Fenton System

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