Sonocatalytic degradation of EDTA in the presence of Ti and Ti@TiO2 nanoparticles

Hakim, Sara El; Chave, Tony; Nikitenko, Sergey I.

doi:10.1016/j.ultsonch.2020.105336

Cited by 7 publications

(11 citation statements)

References 24 publications

(17 reference statements)

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“…Furthermore, the reaction of O 2 − with EDTA gives tertiary iminium Shiff-bases which rapidly hydrolyses into aldehydes and strongly basic secondary amines [19]. This process can explain the increase of pH during EDTA photocatalytic degradation similar to that reported for sonocatalytic process [17]. Some similarity should be mentioned in the composition of intermediates for both processes, those are iminodiacetic acid, formic acid, oxalic acid, glycolic acid and acetic acid [15,21].…”

Section: Comparison Of Sonocatalytic and Photocatalytic Edta Degradationsupporting

confidence: 54%

“…In this section, we compare the photocatalytic EDTA degradation studied in this work in the presence of Ar/O2 gas mixture and the sonocatalytic EDTA degradation reported recently at similar conditions [17]. The overall efficiency of photocatalysis and sonocatalysis can be evaluated upon comparing the yield of EDTA degradation, Y, using the following equation: Y=M•P −1 •m −1 , where M is the amount of degraded EDTA (µmol), P is the energy consumption (kJ), and m is the mass of catalyst (g).…”

Section: Comparison Of Sonocatalytic and Photocatalytic Edta Degradationmentioning

confidence: 99%

“…• ) and superoxide (O 2 ) radicals in solution and bubble/solution interface or by the catalytic degradation of EDTA at the surface of the catalyst (Ti or Ti@TiO 2 ) by oxygen activated initially by the power US at the surface of titanium [17]. It was reported that sonocatalytic EDTA degradation yields several intermediate products shown in Figure S5a [21].…”

Section: Comparison Of Sonocatalytic and Photocatalytic Edta Degradationmentioning

confidence: 99%

“…The suggested mechanism of EDTA sonocatalytic degradation involves the sonochemical oxidation of EDTA molecules by OH . /HO 2 radicals in solution and EDTA oxidation at the surface of Ti 0 NPs in the presence of O 2 activated by the cavitation event [17]. These results are being compared herein with those of the photocatalytic EDTA degradation results.…”

Section: Introductionmentioning

confidence: 97%

“…Herein, air passivated titanium (Ti 0 ) and Ti@TiO 2 core-shell NPs were investigated as catalysts in selected systems. Very recently, sonocatalytic degradation of EDTA over these catalysts has been reported [17]. It was found that the combination of 345 kHz US with the metallic Ti 0 NPs enhances the degradation of EDTA (C 0 = 5 × 10 −3 M) under Ar/20% O 2 atmosphere, and the presence of TiO 2 anatase NPs on the surface of the Ti 0 reduces slightly its efficiency towards EDTA degradation.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic and Sonocatalytic Degradation of EDTA and Rhodamine B over Ti0 and Ti@TiO2 Nanoparticles

2021

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Herein, we report a comparative study of photocatalytic (Xe-lamp) and sonocatalytic (345 kHz power ultrasound) degradation of Ethylenediaminetetraacetic acid (EDTA) and Rhodamine B (RhB) in the presence of Ti0 and Ti@TiO2 core-shell nanoparticles (NPs). Ti@TiO2 NPs have been obtained by sonohydrothermal treatment (20 kHz, 200 °C) of commercially available Ti0 NPs in pure water. The obtained material is composed of quasi-spherical Ti0 particles (30–150 nm) coated by 5–15 nm crystals of anatase. In contrast to pristine TiO2, the Ti@TiO2 NPs exhibit the extend photo response from UV to NIR light region due to the light absorption by nonplasmonic Ti core. EDTA can be oxidized effectively by photocatalysis in the presence of Ti@TiO2 NPs. By contrast, air passivated Ti0 nanoparticles was found to be inactive in the photocatalytic process for both EDTA and RhB. Photocatalytic degradation of EDTA over Ti@TiO2 NPs exhibits strong photothermal effect, which has been attributed to the higher yield of oxidizing radicals produced by light at higher bulk temperature. The efficiency of RhB photocatalytic degradation depends strongly on RhB concentration. At [RhB] ≥ 1 × 10−3 M, its photocatalytic degradation is not feasible due to a strong self-absorption. At lower concentrations, RhB photocatalytic degradation is observed, but at lower efficiency compared to EDTA. We found that the efficient sonochemical degradation of RhB does not require the presence of any catalysts. For both processes, EDTA and RhB, sonochemical and photocatalytic processes are more effective in the presence of Ar/O2 gas mixture compared to pure Ar. The obtained results suggest that the choice of the optimal technology for organic pollutants degradation can be determined by their optical and complexing properties.

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Section: Comparison Of Sonocatalytic and Photocatalytic Edta Degradationsupporting

confidence: 54%

Section: Comparison Of Sonocatalytic and Photocatalytic Edta Degradationmentioning

confidence: 99%

Section: Comparison Of Sonocatalytic and Photocatalytic Edta Degradationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Photocatalytic and Sonocatalytic Degradation of EDTA and Rhodamine B over Ti0 and Ti@TiO2 Nanoparticles

2021

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Glucosylated Hybrid TiO₂/Polymer Nanomaterials for Actively Targeted Sonodynamic Therapy of Cancer

Zlotver,

Sosnik

2023

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Sonodynamic therapy (SDT) is an anti‐cancer therapeutic strategy based on the generation of reactive oxygen species (ROS) upon local ultrasound (US) irradiation of sono‐responsive molecules or nanomaterials that accumulate in the tumor. In this work, the sonodynamic efficiency of sono‐responsive hybrid nanomaterials composed of amorphous titanium dioxide and an amphiphilic poly(ethylene oxide)‐b‐poly(propylene oxide) block copolymer is synthesized, fully characterized, and investigated both in vitro and in vivo. The modular and versatile synthetic pathway enables the control of the nanoparticle size between 30 and 300 nm (dynamic light scattering) and glucosylation of the surface for active targeting of tumors overexpressing glucose transporters. Studies on 2D and 3D rhabdomyosarcoma cell cultures reveal a statistically significant increase in the sonodynamic efficiency of glucosylated hybrid nanoparticles with respect to unmodified ones. Using a xenograft rhabdomyosarcoma murine model, it is demonstrated that by tuning the nanoparticle size and surface features, the tumor accumulation is increased by ten times compared to main off‐target clearance organs such as the liver. Finally, the SDT of rhabdomyosarcoma‐bearing mice is investigated with 50‐nm glucosylated nanoparticles. Findings evidence a dramatic prolongation of the animal survival and tumor volumes 100 times smaller than those treated only with ultrasound or nanoparticles.

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Progress in nanomaterial-driven redox reactions for water purification: A critical review

Ali,

Badar,

Daniyal

et al. 2024

Desalination and Water Treatment

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Sonocatalytic degradation of EDTA in the presence of Ti and Ti@TiO2 nanoparticles

Cited by 7 publications

References 24 publications

Photocatalytic and Sonocatalytic Degradation of EDTA and Rhodamine B over Ti0 and Ti@TiO2 Nanoparticles

Photocatalytic and Sonocatalytic Degradation of EDTA and Rhodamine B over Ti0 and Ti@TiO2 Nanoparticles

Glucosylated Hybrid TiO₂/Polymer Nanomaterials for Actively Targeted Sonodynamic Therapy of Cancer

Progress in nanomaterial-driven redox reactions for water purification: A critical review

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Sonocatalytic degradation of EDTA in the presence of Ti and Ti@TiO2 nanoparticles

Cited by 7 publications

References 24 publications

Photocatalytic and Sonocatalytic Degradation of EDTA and Rhodamine B over Ti0 and Ti@TiO2 Nanoparticles

Photocatalytic and Sonocatalytic Degradation of EDTA and Rhodamine B over Ti0 and Ti@TiO2 Nanoparticles

Glucosylated Hybrid TiO2/Polymer Nanomaterials for Actively Targeted Sonodynamic Therapy of Cancer

Progress in nanomaterial-driven redox reactions for water purification: A critical review

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Product

Resources

About

Glucosylated Hybrid TiO₂/Polymer Nanomaterials for Actively Targeted Sonodynamic Therapy of Cancer