Controlled synthesis of electrospun TiO2 nanofibers and their photocatalytic application in the decolouration of Remazol Black B azo dye

Secundino-Sánchez, O.; Dı́az-Reyes, J.; Ramírez, José Saúl Padilla; Arias-Cerón, J.S.; Galván-Arellano, M.; Vázquez‐Cuchillo, O.

doi:10.1016/j.cattod.2021.10.003

Cited by 17 publications

(5 citation statements)

References 40 publications

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“…Since the CdS has many applications, such as in catalysis [53], it is convenient to calculate the specific surface area (S) that can be estimated theoretically, using the spherical shape of the NPs and their size; as well as the volumetric density of the bulk material. The general expression for this specific surface area per gram, S, is given by expression [54]:…”

Section: Resultsmentioning

confidence: 99%

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Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu2+, Ag+, Au+) Transition Metal Ions

Contreras-Rascón,

Díaz-Reyes,

Flores-Pacheco

et al. 2023

JNanoR

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In this work, the optical and structural properties of the modified crystalline structures of the nanostructured cadmium sulphide (CdS) semiconductor caused by doping with (Cu2+, Ag+, Au+) transition metal ions are studied. Using the chemical bath deposition technique, thin CdS films of good crystalline quality were deposited, which were doped in synthesis without the need for additional steps, obtaining thicknesses of around 100 nm. The chemical binding energies and their interactions of the CdS semiconductor compound with the different transition metal ions were determined by X-ray photoelectron spectroscopy. The crystalline and quality phase of the CBD-CdS thin films were determined by X-ray diffraction that were confirmed by Raman scattering, obtaining that the dominant crystalline phase is zinc blende in the (1 1 1) crystalline direction. A change in crystalline quality from monocrystalline to polycrystalline was observed by XRD in the CdS thin films doped with transition metal ions, keeping the crystalline direction (1 1 1) of the zinc blende phase of CdS as the dominant one; this crystalline behaviour was confirmed by HRTEM micrographs, in addition to the different levels of quantum confinement favoured by each transition metal incorporated into the CdS. By Raman scattering measurements, the crystalline zinc blende phase of CdS was confirmed and also allowed the analysis of the phononic interactions of the binary compound, where Raman shifts provided information on the structural quality and also confirm the effects of quantum confinement. UV-visible optical spectroscopy describes the effects of the crystalline structural modifications with blue shifts on the optical band gap energies of the evaluated CdS samples, related with the different levels of quantum confinement given by the (Cu2+, Ag+, Au+) transition metal dopants.

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Section: Resultsmentioning

confidence: 99%

“…A sphere of diameter D has area 𝐴𝐴 = 𝜋𝜋𝐷𝐷 2 and volume is 𝑉𝑉 = 𝜋𝜋𝐷𝐷 3 /6, to give 𝐴𝐴/𝑉𝑉 = 6/𝐷𝐷. Then, S can be expressed [54]:…”

Section: Resultsmentioning

confidence: 99%

Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu2+, Ag+, Au+) Transition Metal Ions

Contreras-Rascón,

Díaz-Reyes,

Flores-Pacheco

et al. 2023

JNanoR

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“…One dimensional TiO 2 nanomaterials such as nanofibers (NFs) have been extensively used in the application of catalytic activity due to their extraordinary flexibility and their physical and chemical properties. [225,226] Electrospinning is a simple and efficient method used to fabricate nanofibers for a wide variety of suitable materials. This method is reproducible and can be scaled up with low cost consumption.…”

Section: Electrospinningmentioning

confidence: 99%

A Comprehensive Review on Modification of Titanium Dioxide‐Based Catalysts in Advanced Oxidation Processes for Water Treatment

Tanos,

Razzouk,

Lesage

et al. 2023

ChemSusChem

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It has become necessary to develop effective strategies to prevent and reduce water pollution as a result of the increase in dangerous pollutants in water reservoirs. Consequently, there is a need to design new catalyst materials to promote the efficiency of advanced oxidation processes (AOPs) in the field of wastewater treatment plant to ensure the mineralization of trace organic contaminants. A notable approach gaining attention involves the coupling of sulfate radicals‐based AOPs to photocatalysis or electrocatalysis processes, aiming to achieve the complete removal of refractory contaminants into water and carbon dioxide. Titanium dioxide as metal oxide has received great attention for its catalytic application in water purification. TiO2 catalysts offer a multitude of advantages in AOPs. They are characterized by their high photocatalytic activity under both ultraviolet and visible light, making them environmentally friendly due to the absence of toxic byproducts during oxidation. Their versatility is remarkable, finding utility in various AOPs, from photocatalysis to photo‐Fenton processes. TiO2′s durability ensures long‐lasting catalytic activity, which is crucial for continuous treatment processes, and their cost‐effectiveness is particularly advantageous. Furthermore, their chemical stability allows it to withstand varying pH conditions. However, the large band gap energy and low electrical conductivity hinder the catalytic reaction effectiveness. This review aims to examine various approaches to enhance the catalytic performance of titanium dioxide, with the objective of enabling more efficient water purification methods.

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“…Around 99% of the dye degraded after 10 min. TiO 2 nanofbres were reported by Secundino-Sánchez et al [122] and they evaluated the photocatalytic activity by decoloration of Remazol Black B azo dye. Saensook and Sirisuk [123] synthesized black TiO 2 by a chemical reduction for MO dye degradation under both UV and visible-light irradiations.…”

Section: Transition Metal Oxide Catalystsmentioning

confidence: 99%

Recent Advances in Efficient Photocatalytic Degradation Approaches for Azo Dyes

Chowdhury,

Anantharaju,

Keshavamurthy

et al. 2023

Journal of Chemistry

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In recent decades, the textile industry has contributed to continuous pollution in the environment. Synthetic dyes which are commonly found in waste water are azo, sulfur, anthraquinone, triphenylmethyl, indigoid, and phthalocyanine derivatives. These pollutants block the light penetration in water bodies and prevent photosynthesis activity, thereby affecting aquatic life. As an environmental crisis, several technologies have been explored to control pollution. Among all the techniques, the photocatalysis process is considered as a green, simple, and economical process. To improve the photocatalytic activity, researchers worldwide have investigated various photocatalysts such as metal oxides, metal ferrites, and heterostructured nanocomposites. The major goal of this review article is to propose a high-performing, cost-effective hybrid photocatalyst reported to date for prospective azo dye pollutant remediation. This review article also aimed to highlight the challenges and uncertainties associated with dye degradation in the photocatalytic process.

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Controlled synthesis of electrospun TiO2 nanofibers and their photocatalytic application in the decolouration of Remazol Black B azo dye

Cited by 17 publications

References 40 publications

Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu<sup>2+</sup>, Ag<sup>+</sup>, Au<sup>+</sup>) Transition Metal Ions

Characterization of Enhanced Crystalline Structures of CdS Thin Films Deposited by Chemical Bath Deposition Caused by Doping with (Cu<sup>2+</sup>, Ag<sup>+</sup>, Au<sup>+</sup>) Transition Metal Ions

A Comprehensive Review on Modification of Titanium Dioxide‐Based Catalysts in Advanced Oxidation Processes for Water Treatment

Recent Advances in Efficient Photocatalytic Degradation Approaches for Azo Dyes

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