Recent advancements in MXene-based nanocomposites as photocatalysts for hazardous pollutant degradation - A review

Chinnasamy, Chandraleka; Nagapandiselvi, P.; Choubey, Akanksha; Rajendran, Saravanan

doi:10.1016/j.envres.2023.116459

Cited by 15 publications

(3 citation statements)

References 106 publications

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“…When considering the degradation of dyes, MXene-based composites have increased photodegradation capability compared to their unmodified counterparts. This enhanced performance is attributed to active sites within a porous structure, thereby augmenting their photodegradation activity [118]. The photocatalytic dye degradation facilitated by MXene involves an intricate interplay between surface dye adsorption and the generation of reactive oxygen species when exposed to light irradiation [119].…”

Section: Mxene-based Materialsmentioning

confidence: 99%

Harnessing the power of MXenes: a comprehensive exploration of their photocatalytic potential in mitigating hazardous dyes and CO2 reduction

Gulzar,

Haleem,

Rehman

et al. 2024

Discov Mater

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This comprehensive review extensively explores the potential applications of MXenes as versatile materials in the realm of photocatalysis, with a specific focus on their efficacy in mitigating hazardous dyes and CO2 to less harmful and friendly by-products. The review systematically investigates the unique properties that render MXenes well-suited for photocatalytic purposes and provides a thorough examination of their current state of research. It meticulously summarizes the successes and breakthroughs achieved thus far, offering insights into the advancements that have propelled these materials into the spotlight of photocatalytic research. In addition to highlighting achievements, the review critically addresses the challenges and hurdles that impede the full realization of the potential inherent in MXenes. Here, we have also highlighted the stability problem of MXenes and how to overcome this problem for efficient photocatalysis. The mechanism of photocatalysis was also the main theme of this review article and how to overcome the recombination of photogenerated charges. By identifying these challenges, the review serves as a valuable resource for researchers, providing a roadmap for future endeavours to unlock the untapped capabilities of these materials. It serves as a beacon for environmental researchers, offering valuable insights into the pivotal role these materials can play in creating a more environmentally friendly and safe world. Ultimately, this review contributes significantly to the collective knowledge base and will prove instrumental for researchers and professionals dedicated to environmental protection and sustainable living. Graphical Abstract

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Section: Mxene-based Materialsmentioning

confidence: 99%

Harnessing the power of MXenes: a comprehensive exploration of their photocatalytic potential in mitigating hazardous dyes and CO2 reduction

Gulzar,

Haleem,

Rehman

et al. 2024

Discov Mater

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“…The final products of photocatalysis depend on the specific reactants, such as the reduction of Cr(VI) leading to Cr(III) species [63]. In addition, the surface properties, including defects and functional groups, are crucial for determining active sites, emphasizing the importance of understanding MXene surface chemistry to optimize the photocatalytic activity [64]. The photocatalytic systems achieving high solar-to-hydrogen efficiency in photocatalytic water splitting are crucial for renewable hydrogen production.…”

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

Ti3C2-MXene/NiO Nanocomposites-Decorated CsPbI3 Perovskite Active Materials under UV-Light Irradiation for the Enhancement of Crystal-Violet Dye Photodegradation

Alothman,

Khan,

Albaqami

et al. 2023

Nanomaterials

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Ti3C2-MXene material, known for its strong electronic conductivity and optical properties, has emerged as a promising alternative to noble metals as a cocatalyst for the development of efficient photocatalysts used in environmental cleanup. In this study, we investigated the photodegradation of crystal-violet (CV) dye when exposed to UV light using a newly developed photocatalyst known as Ti3C2-MXene/NiO nanocomposite-decorated CsPbI3 perovskite, which was synthesized through a hydrothermal method. Our research investigation into the structural, morphological, and optical characteristics of the Ti3C2-MXene/NiO/CsPbI3 composite using techniques such as FTIR, XRD, TEM, SEM–EDS mapping, XPS, UV–Vis, and PL spectroscopy. The photocatalytic efficacy of the Ti3C2-MXene/NiO/CsPbI3 composite was assessed by evaluating its ability to degrade CV dye in an aqueous solution under UV-light irradiation. Remarkably, the Ti3C2-MXene/NiO/CsPbI3 composite displayed a significant improvement in both the degradation rate and stability of CV dye when compared to the Ti3C2-MXene/NiO nanocomposite and CsPbI3 perovskite materials. Furthermore, the UV–visible absorption spectrum of the Ti3C2-MXene/NiO/CsPbI3 composite demonstrated a reduced band gap of 2.41 eV, which is lower than that of Ti3C2-MXene/NiO (3.10 eV) and Ti3C2-MXene (1.60 eV). In practical terms, the Ti3C2-MXene/NiO/CsPbI3 composite achieved an impressive 92.8% degradation of CV dye within 90 min of UV light exposure. We also confirmed the significant role of photogenerated holes and radicals in the CV dye removal process through radical scavenger trapping experiments. Based on our findings, we proposed a plausible photocatalytic mechanism for the Ti3C2-MXene/NiO/CsPbI3 composite. This research may open up new avenues for the development of cost-effective and high-performance MXene-based perovskite photocatalysts, utilizing abundant and sustainable materials for environmental remediation.

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“…MXene is referred by its chemical formula M n+1 X n T x , where M is the transition metal, X for carbon and T for the termination group as these terminal groups are introduced to the surface of the material during HF etching process. 9 As a result by altering these termination groups with various attachments the properties of MXene can be fine-tuned. 10 The volumetric capacitance and cycle stability of MXenes are particularly impressive.…”

mentioning

confidence: 99%

Revolutionizing Supercapacitors with Next-Level Performance: Developing an Innovative MXene-Based Cobalt Oxide Composite Electrode for Enhanced Supercapacitive Energy Storage Applications

Batool,

Rani,

Shafique

et al. 2023

ECS J. Solid State Sci. Technol.

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A novel Co3O4/MXene composite electrode has been synthesized through an innovative co-precipitation method. The composite has a structure similar to a layered framework, with the cobalt-cobalt (Co3O4) nanosheets exhibiting dangling lattice fringes-spacings of 0.31 and 0.25 nm indexed to the (100) plane of the nanosheet. The composite's morphology has been characterized using transmission electron microscopy, electrochemical impedance spectroscopy (EIS), and X-ray diffraction. The electrostatic of the Co3O4 nanosheet onto MXene surfaces has been demonstrated by EIS. The results of the EIS show that the covalent nanosheet is rearranged in a layer-like manner, resulting in the formation of a nanocomposite with a surface charge-discharge ratio of 0.1M H2SO4 and 1M KOH electrolytes. Furthermore, the electrochemical characteristics of the modified electrode have been investigated by spectrophotometric analysis and cyclic voltammogram. The study's findings contribute to the global pursuit of sustainability by enabling higher energy densities and faster charge-displacements, facilitating the transition to cleaner and more efficient energy solutions. This research not only advances electrode engineering but also empowers various energy storage applications, from portable electronics to renewable energy systems.

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Recent advancements in MXene-based nanocomposites as photocatalysts for hazardous pollutant degradation - A review

Cited by 15 publications

References 106 publications

Harnessing the power of MXenes: a comprehensive exploration of their photocatalytic potential in mitigating hazardous dyes and CO2 reduction

Harnessing the power of MXenes: a comprehensive exploration of their photocatalytic potential in mitigating hazardous dyes and CO2 reduction

Ti3C2-MXene/NiO Nanocomposites-Decorated CsPbI3 Perovskite Active Materials under UV-Light Irradiation for the Enhancement of Crystal-Violet Dye Photodegradation

Revolutionizing Supercapacitors with Next-Level Performance: Developing an Innovative MXene-Based Cobalt Oxide Composite Electrode for Enhanced Supercapacitive Energy Storage Applications

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