An overview of MXene-Based nanomaterials and their potential applications towards hazardous pollutant adsorption

Assad, Humira; Fatma, Ishrat; Kumar, Ashish; Kaya, Savaş; Vo, Dai‐Viet N.; Al‐Gheethi, Adel; Sharma, Ajit

doi:10.1016/j.chemosphere.2022.134221

Cited by 51 publications

(11 citation statements)

References 177 publications

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“…Notably, the adsorption efficiency of Ti 3 C 2 Tx is 2.7 times higher than that of mass-produced powdered activated carbon [ 100 ]. At the same time, the problem of resilience of MXene layers and an increase in the number of functional groups on them, as well as the problem of finding greener and more inexpensive methods for the synthesis of MXenes that exclude the use of toxic reagents, are barriers to the commercial use of MXenes for environmental purification [ 143 ].…”

Section: Environmental Applicationsmentioning

confidence: 99%

Synthesis, Toxicity Assessment, Environmental and Biomedical Applications of MXenes: A Review

et al. 2022

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MXenes are a family of two-dimensional (2D) composite materials based on transition metal carbides, nitrides and carbonitrides that have been attracting attention since 2011. Combination of electrical and mechanical properties with hydrophilicity makes them promising materials for biomedical applications. This review briefly discusses methods for the synthesis of MXenes, their potential applications in medicine, ranging from sensors and antibacterial agents to targeted drug delivery, cancer photo/chemotherapy, tissue engineering, bioimaging, and environmental applications such as sensors and adsorbents. We focus on in vitro and in vivo toxicity and possible mechanisms. We discuss the toxicity analogies of MXenes and other 2D materials such as graphene, mentioning the greater biocompatibility of MXenes. We identify existing barriers that hinder the formation of objective knowledge about the toxicity of MXenes. The most important of these barriers are the differences in the methods of synthesis of MXenes, their composition and structure, including the level of oxidation, the number of layers and flake size; functionalization, test concentrations, duration of exposure, and individual characteristics of biological test objects Finally, we discuss key areas for further research that need to involve new methods of nanotoxicology, including predictive computational methods. Such studies will bring closer the prospect of widespread industrial production and safe use of MXene-based products.

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Section: Environmental Applicationsmentioning

confidence: 99%

Synthesis, Toxicity Assessment, Environmental and Biomedical Applications of MXenes: A Review

et al. 2022

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“…Photocatalysis is considered a relatively safer and low-cost strategy for the elimination of hazardous pollutants [ 37 , 62 , 63 ]. In this context, MXenes with distinctive lamellar structures and remarkable conductivity can be applied as nano-adsorbents to remediate environmentally toxic pollutants, and also as co-catalysts for improving photocatalytic degradation potential of the other composites in their photocatalytic performances [ 13 , 64 ]; several studies have focused on photocatalytic degradation of dyes, heavy metals, and pharmaceutical pollutants. For instance, MXene/TiO 2 nanocomposites were constructed for photocatalytic degradation of organic pollutants [ 65 ].…”

Section: Photocatalytic Degradation Of Organic and Pharmaceutical Pol...mentioning

confidence: 99%

“…The design of heterostructures can improve the catalytic performance of MXene-based photocatalysts, because of the triggered interfacial electron transfer [ 64 ]. In one study, the chimeric ZnO nanosheets with suitable carrier mobility were created on the accordion-shaped surface of MXenes (Nb 2 C and V 2 C) to obtain hierarchical ZnO/MXene heterostructures as photocatalysts for degradation of dyes [ 79 ].…”

Section: Photocatalytic Degradation Of Organic and Pharmaceutical Pol...mentioning

confidence: 99%

MXene-Based Photocatalysts in Degradation of Organic and Pharmaceutical Pollutants

Iravani

Varma

2022

Molecules

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These days, explorations have focused on designing two-dimensional (2D) nanomaterials with useful (photo)catalytic and environmental applications. Among them, MXene-based composites have garnered great attention owing to their unique optical, mechanical, thermal, chemical, and electronic properties. Various MXene-based photocatalysts have been inventively constructed for a variety of photocatalytic applications ranging from pollutant degradation to hydrogen evolution. They can be applied as co-catalysts in combination with assorted common photocatalysts such as metal sulfide, metal oxides, metal–organic frameworks, graphene, and graphitic carbon nitride to enhance the function of photocatalytic removal of organic/pharmaceutical pollutants, nitrogen fixation, photocatalytic hydrogen evolution, and carbon dioxide conversion, among others. High electrical conductivity, robust photothermal effects, large surface area, hydrophilicity, and abundant surface functional groups of MXenes render them as attractive candidates for photocatalytic removal of pollutants as well as improvement of photocatalytic performance of semiconductor catalysts. Herein, the most recent developments in photocatalytic degradation of organic and pharmaceutical pollutants using MXene-based composites are deliberated, with a focus on important challenges and future perspectives; techniques for fabrication of these photocatalysts are also covered.

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“…Another 2D material which has shown great environmental compatibility and potential in absorbing PM 2.5 is Mxene. , The aqueous processability due to hydrophilic functional groups such as fluorine (F), hydroxyl (OH), oxygen (O), and chlorine (Cl) on the surface of Mxene is advantageous for incorporating them into freestanding 3D structures . Mxene has been recently utilized by Gao et al, as a PM 2.5 filter with antibacterial properties by incorporating them into PAN fiber membranes (Figure A) .…”

Section: General Overview On 2d Materials For Air Filtration Applicationmentioning

confidence: 99%

Application of 2D Materials for Adsorptive Removal of Air Pollutants

et al. 2022

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Air pollution is on the priority list of global safety issues, with the concern of fatal environmental and public health deterioration. 2D materials are potential adsorbent materials for environmental decontamination, owing to their high surface area, manageable interlayer binding, large surface-to-volume ratio, specific binding capability, and chemical, thermal, and mechanistic stability. Specifically, graphene oxide and reduced graphene oxide have been attracting attention, taking advantage of their low cost synthesis, excessive oxygen containing surface functionalities, and intrinsic aqueous dispersibility, making them desirable for the development of cost-effective, high performance air filters. Many different material designs have been proposed to expand their filtration capability, including the functionalization and integration with other metals and metal oxides, which act not only as binding agents to the target pollutants but also as antimicrobial agents. This review highlights the advantages and drawbacks of 2D materials for air filtration and summarizes the interrelationships among various strategies and the resultant filtration performance in terms of structural engineering, morphology control, and material compositions. Finally, potential future directions are suggested toward the idealized designs of 2D material based air filters.

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An overview of MXene-Based nanomaterials and their potential applications towards hazardous pollutant adsorption

Cited by 51 publications

References 177 publications

Synthesis, Toxicity Assessment, Environmental and Biomedical Applications of MXenes: A Review

Synthesis, Toxicity Assessment, Environmental and Biomedical Applications of MXenes: A Review

MXene-Based Photocatalysts in Degradation of Organic and Pharmaceutical Pollutants

Application of 2D Materials for Adsorptive Removal of Air Pollutants

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