Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal

Bermudez, P Rivera; Rodríguez, Veloz; Peña-Rodríguez, Gabriel

doi:10.1088/1742-6596/2046/1/012041

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…The artificial production of TiO 2 for photochemical purposes can be realized by various procedures, such as precipitation [6], solvothermal [7][8][9], various sol-gel [10][11][12], microemulsion [13,14], and electrochemical methods [15,16]. Gas-phase processes are mostly used to produce thin catalyst films [17,18].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Various Titanium-Dioxide-Based Catalysts Regarding Photocatalytic Mineralization of Carbamazepine also Combined with Ozonation

et al. 2022

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Titanium-dioxide-based semiconductors proved to be appropriate for photocatalytic application to efficiently degrade emerging organic pollutants such as various herbicides, pesticides, and pharmaceuticals in waters of environmental importance. The characterization of various TiO2 catalysts, both bare and modified (Ag- and/or N-doped), by mechanochemical treatment was carried out in this work, regarding their structure, morphology, and photocatalytic activity. For the latter investigations, carbamazepine, an antidepressant, proved to be applicable and versatile. The photocatalytic behavior of the catalysts was studied under both UV and visible light. Besides the decomposition efficiency, monitoring the intermediates provided information on the degradation mechanisms. Mechanochemical treatment significantly increased the particle size (from 30 nm to 10 μm), causing a considerable (0.14 eV) decrease in the band gap. Depending on the irradiation wavelength and the catalyst, the activity orders differed, indicating that, in the mineralization processes of carbamazepine, the importance of the different oxidizing radicals considerably deviated, e.g., Ag-TiO2 < DP25-TiO2 < ground-DP25-TiO2 < N-TiO2 ≈ N-Ag-TiO2 for O2•− and N-TiO2 ≈ Ag-TiO2 < N-Ag-TiO2 < ground-DP25-TiO2 ≈ DP25-TiO2 for HO• generation under UV irradiation. Toxicity studies have shown that the resulting intermediates are more toxic than the starting drug molecule, so full mineralization is required. This could be realized by a synergistic combination of heterogeneous photocatalysis and ozonation.

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Section: Introductionmentioning

confidence: 99%

Characterization of Various Titanium-Dioxide-Based Catalysts Regarding Photocatalytic Mineralization of Carbamazepine also Combined with Ozonation

et al. 2022

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“…For the latter, TiO 2 can be obtained either by cathodic deposition from a precursor solution 24 or, more commonly, anodization. [25][26][27] Anodization is particularly versatile as it can yield films of various nanostructured morphologies, but most often an amorphous material is obtained, 28 which is then annealed to obtain an anatase crystalline structure that is desirable for PEC applications.…”

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confidence: 99%

Plasma Electrolytic Oxidation Synthesis of Heterostructured TiO₂/Cu_xO Films for Photoelectrochemical Water Splitting Applications

Levinas,

Pakstas,

Selskis

et al. 2024

J. Electrochem. Soc.

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TiO2 is a versatile photo-/electrochemically active material that finds a wide variety of applications in industry and science. Its main but often overlooked advantage is the abundance of Ti in nature, as it is the ninth most commonly found element in the Earth’s crust. Despite some drawbacks (e.g., large band gap) that limit its light conversion efficiency in comparison to other materials, it is particularly inert in corrosive media, and its properties can be modified by various means. In this study TiO2 films were synthesized by an anodization-like procedure called plasma electrolytic oxidation. By varying synthesis conditions, different morphologies and structures were obained. Moreover, successful heterostructuring was achieved by adding a copper precursor to the solution. The TiO2/CuxO films were comprehensively characterized for their structural, optical, and photoelectrochemical properties. Interpretation of X-ray phototelectron and X-ray absorption near edge spectra suggest that the content of Cu2+ increases in relation to the maximum voltage reached during synthesis. UV-Vis absorption spectra were also found to display a distinct Cu2+ absorption footprint, as well as lower optical band gap values for the heterostructures. A comprehensive photoelectrochemical characterization for water splitting in 1 M KOH revealed that the TiO2/CuxO films exhibit improved activity overall.

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Electrogeneration of active photocatalysts for wastewater remediation: a review

Mutalib

Jaafar²

2022

Environ Chem Lett

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Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal

Cited by 4 publications

References 20 publications

Characterization of Various Titanium-Dioxide-Based Catalysts Regarding Photocatalytic Mineralization of Carbamazepine also Combined with Ozonation

Characterization of Various Titanium-Dioxide-Based Catalysts Regarding Photocatalytic Mineralization of Carbamazepine also Combined with Ozonation

Plasma Electrolytic Oxidation Synthesis of Heterostructured TiO₂/Cu_xO Films for Photoelectrochemical Water Splitting Applications

Electrogeneration of active photocatalysts for wastewater remediation: a review

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Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal

Cited by 4 publications

References 20 publications

Characterization of Various Titanium-Dioxide-Based Catalysts Regarding Photocatalytic Mineralization of Carbamazepine also Combined with Ozonation

Characterization of Various Titanium-Dioxide-Based Catalysts Regarding Photocatalytic Mineralization of Carbamazepine also Combined with Ozonation

Plasma Electrolytic Oxidation Synthesis of Heterostructured TiO2/CuxO Films for Photoelectrochemical Water Splitting Applications

Electrogeneration of active photocatalysts for wastewater remediation: a review

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Plasma Electrolytic Oxidation Synthesis of Heterostructured TiO₂/Cu_xO Films for Photoelectrochemical Water Splitting Applications