Recent developments in photocatalytic remediation of textile effluent using semiconductor based nanostructured catalyst: A review

Ambigadevi, J.; Kumar, P. Senthil; Vo, Dai‐Viet N.; Haran, S. Hari; Raghavan, T.N. Srinivasa

doi:10.1016/j.jece.2020.104881

Cited by 99 publications

(36 citation statements)

References 203 publications

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“…On the other hand, the La ion exerted a significant effect on the gap band and particle size of the ZTO hybrid catalyst. These physical chemistry changes improved efficiency in the absorption and photodegradation under solar irradiation of MB [ 144 , 145 ].…”

Section: Discussionmentioning

confidence: 99%

La-Doped ZnTiO3/TiO2 Nanocomposite Supported on Ecuadorian Diatomaceous Earth as a Highly Efficient Photocatalyst Driven by Solar Light

2021

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Currently, there is great interest in the use of TiO2 for photocatalytic remediation of wastewater. Doping, heterojunction, and immobilization on porous materials are effective methods to improve the photocatalytic efficiency of this semiconductor oxide. In this study, ZnTiO3/TiO2 (ZTO) and ZnTiO3/TiO2/La (ZTO/La) nanocomposites were successfully prepared and immobilized on diatomaceous earth (DE). The composition and texture of the composites prepared were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM-EDX), and specific surface area (SSA). The adsorption capacity and photocatalytic activity of the composites were determined via degradation of methylene blue (MB) in batch reactors. The materials evaluated were prepared in the shape of 0.2 cm (diameter) and 1.0 cm (length) cylindrical extrudates. The results indicate that the ZTO/La-DE composite exhibited higher efficiency for the removal of MB under solar irradiation than both ZTO-DE and DE. The pseudo-second-order model and the Langmuir isotherm model were better suited to explain the adsorption process. The highest degradation percentage of MB obtained was 96% after 150 min of irradiation. The results indicate that synthesized composite could be used for the removal of cationic dyes in wastewater.

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Section: Discussionmentioning

confidence: 99%

La-Doped ZnTiO3/TiO2 Nanocomposite Supported on Ecuadorian Diatomaceous Earth as a Highly Efficient Photocatalyst Driven by Solar Light

2021

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“…Many strategies have been developed so far, but green bioremediation is preferable. In this regard, innovative photocatalytic methods have been improved for water treatment (Ambigadevi et al 2021). Photocatalysis uses sunlight, which is a renewable free energy, an unlimited source of ultraviolet and visible (UV-Vis) radiation, together with a suitable catalyst (e.g., semiconductors) that can destroy pollutants through oxidation-reduction reactions (Rajabi et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, nanoparticles (NPs) are exciting materials with unique physicochemical features due to the confinement of the charge carriers in the narrow space of its nanocrystal. Nanosized binary chalcogenides which belong to groups II-VI semiconductors, such as ZnS, CdS, and PbS, have gained significant consideration in many applications due to their unique characteristics compared to their bulk counterparts (El-Baz et al 2016;Ambigadevi et al 2021). In this respect, ZnS is a valuable semiconductor in some applications, such as electroluminescence, photocatalysis, and biosensors (Dhir 2021).…”

Section: Introductionmentioning

confidence: 99%

Biomediated nanosized ZnS using Ulva fasciata and Citrus japonica: A new bio-photocatalyst for textile wastewater treatment

Nady¹,

Abbas²,

Sorour³

2022

Rend. Fis. Acc. Lincei

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The aquatic ecosystems face excessive stress and depletion due to many pollutants impacting water quality. Biosynthesis of nanoparticles (NPs) using the green route represents a cost-effectively and eco-friendly approach, with significant applicability in various fields. In this regard, ZnS-NPs with improved photocatalytic and antimicrobial activities were biosynthesized for the first time from Ulva fasciata and Citrus japonica aqueous extracts. Biosynthesized ZnS-NPs were characterized and compared with chemically synthesized ones using UV–Vis spectroscopy, FTIR, TEM, XRD, and EDAX. TEM micrographs and XRD confirmed the formation of polygonal and spherical-shaped ZnS blend sphalerite nanocrystals with an average diameter between 7 and 31 nm. The optical properties of the produced ZnS-NPs showed higher band-gap energy of 5.63 eV and 4.76 eV for chemically and biosynthesized ZnS-NPs, respectively, as compared to ZnS macromolecules (3.77 eV). Biosynthesized ZnS-NPs showed excellent photocatalytic activity toward textile wastewater and two organic dyes (crystal violet and safranin), with significant degradation efficiency of 82–96.8, 82.5–98.12, and 84–95.9%, respectively. Biosynthesized ZnS-NPs showed high stability up to three subsequent cycles of photodegradation and exhibited promising antimicrobial activity against different Gram-positive and Gram-negative bacteria and Candida albicans. Biosynthesized ZnS-NPs have a less cytotoxic effect (IC50 > 300 μg/mL) than chemically synthesized ZnS-NPs (IC50 88 μg/mL) on human skin fibroblast normal cell lines. The photocatalytic efficiency of the biosynthesized ZnS-NPs has some advantages, such as non-toxic products, cost-effectiveness, and antimicrobial activity, which give them superiority to be used as a safe bio-photocatalyst for water treatment. Graphical abstract

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“…Azo dyes have chromophore group of azo (-N=N-). Their complex aromatic structures, toxic effects and non-biodegradability nature involve considering a proficient technology for remediation of textile wastewater [19]. The release of colored wastewater into aquatic environments has a detrimental effect on photosynthetic mechanism by reducing light penetration [20].…”

Section: Introductionmentioning

confidence: 99%

Decolorization of Reactive Black 5 Using N-Doped TiO2

Berktaş

Kartal

2022

Gazi University Journal of Science

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Decolorization of Reactive Black 5 (RB5) was investigated by heterogeneous photocatalysis using N-doped TiO2. N-doped TiO2 photocatalysts were synthesized by means of a sol-gel process. X-ray diffraction performed the characterization of synthesized samples, scanning electron microscopy and X-ray photoelectron spectroscopy measurements. Photocatalytic activity of N-doped TiO2 samples was assessed by following decolorization and degradation efficiency of RB5. N-TiO2(3) sample yielded the highest decolorization efficiency. The apparent first-order rate constants for decolorization of RB5 with N-TiO2(X) samples followed the order of N-TiO2(3) > N-TiO2(2) > N-TiO2(4) > N-TiO2(1). Improvement of decolorization efficiency of TiO2 was observed doping with nitrogen. The effect of actual sunlight on decolorization efficiency was also investigated. 96% and 49% of decolorization efficiency levels were attained within 60 minutes of reaction time with outdoor sunlight and fluorescent daylight lamps, respectively.

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Recent developments in photocatalytic remediation of textile effluent using semiconductor based nanostructured catalyst: A review

Cited by 99 publications

References 203 publications

La-Doped ZnTiO3/TiO2 Nanocomposite Supported on Ecuadorian Diatomaceous Earth as a Highly Efficient Photocatalyst Driven by Solar Light

La-Doped ZnTiO3/TiO2 Nanocomposite Supported on Ecuadorian Diatomaceous Earth as a Highly Efficient Photocatalyst Driven by Solar Light

Biomediated nanosized ZnS using Ulva fasciata and Citrus japonica: A new bio-photocatalyst for textile wastewater treatment

Decolorization of Reactive Black 5 Using N-Doped TiO2

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