Photocatalytic removal of pharmaceutical water pollutants by TiO2 – Carbon dots nanocomposites: A review

Sendão, Ricardo M S; Silva, Joaquim C. G. Esteves da; Silva, Luís Pinto da

doi:10.1016/j.chemosphere.2022.134731

Cited by 53 publications

(29 citation statements)

References 139 publications

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“…Superoxide can be protonated to produce a hydroperoxyl radical and hydrogen peroxide. 60 Hydrogen peroxide dissociates to form hydroxyl radicals, and these hydroxyl radicals react with inorganic pollutants to produce a pollutant intermediate. The inorganic pollutant reacts with holes to form oxidative products, and when electrons interact with the pollutant they are modified to reduction products.…”

Section: Photocatalysis Processmentioning

confidence: 99%

Recent advances in carbon-based nanomaterials for the treatment of toxic inorganic pollutants in wastewater

et al. 2023

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Section: Photocatalysis Processmentioning

confidence: 99%

Recent advances in carbon-based nanomaterials for the treatment of toxic inorganic pollutants in wastewater

et al. 2023

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“…Current research trends show that hybrid nanomaterials have emerged as a powerful tool to create multifunctional nanocomposite membranes [ 131 ]. The hybridization of TiO 2 with other nanostructured materials has therefore become a topic of interest.…”

Section: Liquid Separation Membranes With Multidimensional Tio ...mentioning

confidence: 99%

Modification of Liquid Separation Membranes Using Multidimensional Nanomaterials: Revealing the Roles of Dimension Based on Classical Titanium Dioxide

et al. 2023

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Membrane technology has become increasingly popular and important for separation processes in industries, as well as for desalination and wastewater treatment. Over the last decade, the merger of nanotechnology and membrane technology in the development of nanocomposite membranes has emerged as a rapidly expanding research area. The key motivation driving the development of nanocomposite membranes is the pursuit of high-performance liquid separation membranes that can address the bottlenecks of conventionally used polymeric membranes. Nanostructured materials in the form of zero to three-dimensions exhibit unique dimension-dependent morphology and topology that have triggered considerable attention in various fields. While the surface hydrophilicity, antibacterial, and photocatalytic properties of TiO2 are particularly attractive for liquid separation membranes, the geometry-dependent properties of the nanocomposite membrane can be further fine-tuned by selecting the nanostructures with the right dimension. This review aims to provide an overview and comments on the state-of-the-art modifications of liquid separation membrane using TiO2 as a classical example of multidimensional nanomaterials. The performances of TiO2-incorporated nanocomposite membranes are discussed with attention placed on the special features rendered by their structures and dimensions. The innovations and breakthroughs made in the synthesis and modifications of structure-controlled TiO2 and its composites have enabled fascinating and advantageous properties for the development of high-performance nanocomposite membranes for liquid separation.

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“…Since the sorbent plays a key role in the sorption process, developing high-performance sorbents is crucial for the feasibility of applying sorption in water cleanup. Thus far, numerous sorbents, such as carbons [ 14 , 15 , 16 , 17 , 18 ], oxides [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ], nitrides [ 26 , 27 , 28 , 29 ] and polymers [ 30 , 31 , 32 , 33 , 34 , 35 ], have been reported. For example, Deng et al prepared thio-functionalized polyacrylonitrile fiber for the selective and enhanced adsorption of mercury and cadmium from water [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Conversion of Polystyrene Waste into an Efficient Sorbent for Water Purification

Pan

Shen

2022

Polymers

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In this work, we convert a plastic waste, i.e., polystyrene (PS), into a sorbent by a simple sulfonation process. The sulfonation time was optimized and the structures of the resulting sulfonated polystyrene (SPS) was characterized by field emission scanning electron microscopy, energy-dispersive X-ray and contact angle tests. The results showed that the sulfonation time of 7 h can introduce abundant sulfonic groups and preserve the self-standing structure. Additionally, the SPS has a three-dimensional porous structure and hydrophilic surface because of the presence of numerous sulfonic groups, which could serve as effective binding sites for immobilizing varying pollutants. Furthermore, as a proof-of-concept, the adsorption performance of the SPS foams was evaluated using three pollutants, namely Pb2+, lysozyme and methylene blue. The adsorption isotherms were fitted by the Langmuir and Freundlich models, while the kinetics of the adsorption processes were analyzed using the pseudo-first-order, pseudo-second-order and intraparticle diffusion equations. It was found that the adsorption isotherms of Pb2+ and lysozyme can be better described by the Langmuir model, leading to maximum equilibrium adsorption uptakes of 10.5 and 15.7 mg g−1 for the adsorption of Pb2+ and lysozyme, respectively. Importantly, the pollutant-saturated SPS is readily regenerated by acid washing, and the recovered sorbents exhibit outstanding cyclic performance. The abundant availability of feedstock, facile preparation and regeneration processes render the SPS foams a promising sorbent for practical applications.

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Photocatalytic removal of pharmaceutical water pollutants by TiO2 – Carbon dots nanocomposites: A review

Cited by 53 publications

References 139 publications

Recent advances in carbon-based nanomaterials for the treatment of toxic inorganic pollutants in wastewater

Recent advances in carbon-based nanomaterials for the treatment of toxic inorganic pollutants in wastewater

Modification of Liquid Separation Membranes Using Multidimensional Nanomaterials: Revealing the Roles of Dimension Based on Classical Titanium Dioxide

Facile Conversion of Polystyrene Waste into an Efficient Sorbent for Water Purification

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