A novel sensing platform based on self-doped TiO2 nanotubes for methylene blue dye electrochemical monitoring during its electro-Fenton degradation

Soto, Pablo C.; Salamanca-Neto, Carlos Alberto Rossi; Moraes, Jaqueline Tobias; Sartori, Elen Romão; Bessegato, Guilherme G.; Lopes, Fábio Henrique; Almeida, Lucio C.

doi:10.1007/s10008-020-04509-1

Cited by 14 publications

(3 citation statements)

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“…25 This limitation can be minimised in an electrochemical system because an external potential applied to the system forces the photoexcited electrons from the working electrode to the auxiliary electrode, reducing the recombination effect and resulting in greater system efficiency. 21,22,[25][26][27][28] Furthermore, other advanced oxidation processes include the Fenton [29][30][31] and piezocatalysis [32][33][34] approaches. For instance, molybdenum oxide/zinc sulphide/zinc oxide, 32 nickel oxide/barium titanate, 33 bismuth tungstate/zinc stannate 34 piezoelectric nanomaterials, as well as copper (II) oxide@tin (IV) oxide@polydopamine 29 and titanium dioxide nanoparticles, 30,31 have been efficiently applied in the water purification process.…”

Section: Introductionmentioning

confidence: 99%

“…21,22,[25][26][27][28] Furthermore, other advanced oxidation processes include the Fenton [29][30][31] and piezocatalysis [32][33][34] approaches. For instance, molybdenum oxide/zinc sulphide/zinc oxide, 32 nickel oxide/barium titanate, 33 bismuth tungstate/zinc stannate 34 piezoelectric nanomaterials, as well as copper (II) oxide@tin (IV) oxide@polydopamine 29 and titanium dioxide nanoparticles, 30,31 have been efficiently applied in the water purification process.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and deposition of bismuth oxychloride with a rose‐type flower shape and photoelectroactivity evaluation in the methyl orange discoloration reaction

Pelissari

Camargo

Dall’Antônia

2023

Coloration Technology

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In this work, bismuth oxychloride with a rose‐type flower shape was successfully synthesised using the easy and low‐cost successive ionic layer adsorption and reaction process. The tetragonal crystalline structure with a flower‐like shape and thickness of 150‐nm nanosheets was used as electrode material in an exciting approach for the photoelectrochemical discoloration reaction of methyl orange. The structure, morphology and optical properties of the obtained bismuth oxychloride sample were evaluated through X‐ray diffraction, Raman spectroscopy, the Brunauer–Emmett–Teller method, diffuse reflectance ultraviolet–visible spectroscopy and scanning electron microscopy. Through photoelectrochemical characterisation measurements (linear sweep voltammetry, chronoamperometry and electrochemical impedance spectroscopy techniques), the bismuth oxychloride electrode showed remarkable electroactivity under ultraviolet light irradiation. The methyl orange discoloration reaction, performed under ultraviolet light incidence and potential application of −0.5 V (vs silver/silver chloride) for 60 minutes, produced a higher degradation percentage (ca. 82%) and kobs of 29 × 10−3 min−1.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and deposition of bismuth oxychloride with a rose‐type flower shape and photoelectroactivity evaluation in the methyl orange discoloration reaction

Pelissari

Camargo

Dall’Antônia

2023

Coloration Technology

View full text Add to dashboard Cite

show abstract

“…These factors enhance the photocatalytic activity by extending the functionality of TiO 2 under visible light and by activating this semiconductor for solely electrochemical process. Various experimental conditions are currently explored in the electrochemical self-doping of TiO 2 nanotubes, and one of the main drawbacks is the time-consuming nature of the process (frequently requiring tens of minutes [32][33][34][35]), and the challenges associated with achieving uniform and controlled doping levels. Developing a rapid strategy is crucial, as it can significantly reduce the processing time, making the production of self-doped TiO 2 nanotubes more efficient and scalable.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Electrochemical Self-Doping of Anodic Titanium Dioxide Nanotubes for Enhanced Electroanalytical and Photocatalytic Performance

Spanu,

Dhahri,

Binda

et al. 2023

Chemosensors

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This study explores an ultrarapid electrochemical self-doping procedure applied to anodic titanium dioxide (TiO2) nanotube arrays in an alkaline solution to boost their performance for electroanalytical and photocatalytic applications. The electrochemical self-doping process (i.e., the creation of surface Ti3+ states by applying a negative potential) is recently emerging as a simpler and cleaner way to improve the electronic properties of TiO2 compared to traditional chemical and high-temperature doping strategies. Here, self-doping was carried out through varying voltages and treatment times to identify the most performing materials without compromising their structural stability. Interestingly, cyclic voltammetry characterization revealed that undoped TiO2 shows negligible activity, whereas all self-doped materials demonstrate their suitability as electrode materials: an outstandingly short 10 s self-doping treatment leads to the highest electrochemical activity. The electrochemical detection of hydrogen peroxide was assessed as well, demonstrating a good sensitivity and a linear detection range of 3–200 µM. Additionally, the self-doped TiO2 nanotubes exhibited an enhanced photocatalytic activity compared to the untreated substrate: the degradation potential of methylene blue under UV light exposure increased by 25% in comparison to undoped materials. Overall, this study highlights the potential of ultrafast electrochemical self-doping to unleash and improve TiO2 nanotubes performances for electroanalytical and photocatalytic applications.

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Synthesis, characterization, and mechanistic study involved in the self-doping of TiO2 nanotubes simultaneously to the impedimetric detection of methylene blue

Soto,

Martins,

Sarto

et al. 2024

J Solid State Electrochem

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A novel sensing platform based on self-doped TiO2 nanotubes for methylene blue dye electrochemical monitoring during its electro-Fenton degradation

Cited by 14 publications

References 50 publications

Synthesis and deposition of bismuth oxychloride with a rose‐type flower shape and photoelectroactivity evaluation in the methyl orange discoloration reaction

Synthesis and deposition of bismuth oxychloride with a rose‐type flower shape and photoelectroactivity evaluation in the methyl orange discoloration reaction

Ultrafast Electrochemical Self-Doping of Anodic Titanium Dioxide Nanotubes for Enhanced Electroanalytical and Photocatalytic Performance

Synthesis, characterization, and mechanistic study involved in the self-doping of TiO2 nanotubes simultaneously to the impedimetric detection of methylene blue

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