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As a thriving member of the 2D nanomaterials family, MXenes, i.e., transition metal carbides, nitrides, and carbonitrides, exhibit outstanding electrochemical, electronic, optical, and mechanical properties. They have been exploit...
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As a thriving member of the 2D nanomaterials family, MXenes, i.e., transition metal carbides, nitrides, and carbonitrides, exhibit outstanding electrochemical, electronic, optical, and mechanical properties. They have been exploited in many applications including energy storage, electronics, optoelectronics, biomedicine, sensors, and catalysis. Compared to other 2D materials, MXenes possess a unique set of properties such as high metallic conductivity, excellent dispersion quality, negative surface charge, and hydrophilicity, making them particularly suitable as inks for printing applications. Printing and pre/post-patterned coating methods represent a whole range of simple, economically efficient, versatile, and eco-friendly manufacturing techniques for devices based on MXenes. Moreover, printing can allow for complex 3D architectures and multifunctionality that are highly required in various applications. By means of printing and patterned coating, the performance and application range of MXenes can be dramatically increased through careful patterning in three dimensions; thus, printing/coating is not only a device fabrication tool but also an enabling tool for new applications as well as for industrialization.
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Monolayered Ti3C2O hybrid (001) TiO2 (Ti3C2O/(001) TiO2) photocatalyst was synthesized via a facile hydrothermal subsequent annealing method. The Schottky junction was constructed in situ by regulating surface functional groups, e...
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Monolayered Ti3C2O hybrid (001) TiO2 (Ti3C2O/(001) TiO2) photocatalyst was synthesized via a facile hydrothermal subsequent annealing method. The Schottky junction was constructed in situ by regulating surface functional groups, exposing highly active facets, and controlling structural dimension. Among the composite, monolayered Ti3C2O nanosheets acted as the electron reservoir to effectively separate the photogenerated electrons/holes. The exposure of the (001) facet largely improved the catalytic activity and surface energy of the TiO2 material. Through the well-planned triple modifications, the highest activity of photocatalytic hydrogen evolution is 13.63 times than the contrast. In this work, excellent photocatalytic material with Schottky junction was prepared by structural modification
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Abstract Early transition metals based 2D carbides, nitrides and carbonitrides nanomaterials are known as MXenes, a novel and extensive new class of 2D materials family. Since the first accidently synthesis based discovery of Ti3C...
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Abstract Early transition metals based 2D carbides, nitrides and carbonitrides nanomaterials are known as MXenes, a novel and extensive new class of 2D materials family. Since the first accidently synthesis based discovery of Ti3C2 in 2011, more than 50 additional compositions have been experimentally reported, including at least eight distinct synthesis methods and also more than 100 stoichiometries are theoretically studied. Due to its distinctive surface chemistry, graphene like shape, metallic conductivity, high hydrophilicity, outstanding mechanical and thermal properties, redox capacity and affordable with mass‐produced nature, this diverse MXenes are of tremendous scientific and technological significance. In this review, first we'll come across the MXene based nanomaterials possible synthesis methods, their advantages, limitations and future suggestions, new chemistry related to their selected properties and potential sensing applications, which will help us to explain why this family is growing very fast as compared to other 2D families. Secondly, problems that help to further improve commercialization of the MXene nanomaterials based sensors are examined, and many advances in the commercializing of the MXene nanomaterials based sensors are proposed. At the end, we'll go through the current challenges, limitations and future suggestions.
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The rapid increase in the global population and its ever-rising standards of living are imposing a huge burden on global resources. Apart from the rising energy needs, the demand for freshwater is correspondingly increasing. A pop...
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The rapid increase in the global population and its ever-rising standards of living are imposing a huge burden on global resources. Apart from the rising energy needs, the demand for freshwater is correspondingly increasing. A population of around 3.8 billion people will face water scarcity by 2030, as per the reports of the World Water Council. This may be due to global climate change and the deficiency in the treatment of wastewater. Conventional wastewater treatment technologies fail to completely remove several emerging contaminants, especially those containing pharmaceutical compounds. Hence, leading to an increase in the concentration of harmful chemicals in the human food chain and the proliferation of several diseases. MXenes are transition metal carbide/nitride ceramics that primarily structure the leading 2D material group. MXenes act as novel nanomaterials for wastewater treatment due to their high surface area, excellent adsorption properties, and unique physico-chemical properties, such as high electrical conductivity and hydrophilicity. MXenes are highly hydrophilic and covered with active functional groups (i.e., hydroxyl, oxygen, fluorine, etc.), which makes them efficient adsorbents for a wide range of species and promising candidates for environmental remediation and water treatment. This work concludes that the scaling up process of MXene-based materials for water treatment is currently of high cost. The up-to-date applications are still limited because MXenes are currently produced mainly in the laboratory with limited yield. It is recommended to direct research efforts towards lower synthesis cost procedures coupled with the use of more environmentally friendly materials to avoid secondary contamination.
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MXene is becoming a "rising star" material due to its versatility for a wide portfolio of applications, including electrochemical energy storage devices, electrocatalysis, sensors, biomedical applications, membranes, flexible and ...
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MXene is becoming a "rising star" material due to its versatility for a wide portfolio of applications, including electrochemical energy storage devices, electrocatalysis, sensors, biomedical applications, membranes, flexible and wearable devices, etc. As these applications promote increased interest in MXene research, summarizing the latest findings on this family of materials will help inform the scientific community. In this review, we first discuss the rapid evolutionary change in MXenes from the first reported M2XTx structure to the last reported M5X4Tx structure. The use of systematically modified synthesis routes, such as foreign atom intercalation, tuning precursor chemistry, etc., will be further discussed in the next section. Then, we review the applications of MXenes and their composites/hybrids for rapidly growing applications such as batteries, supercapacitors, electrocatalysts, sensors, biomedical, electromagnetic interference shielding, membranes, and flexible and wearable devices. More importantly, we notice that its excellent metallic conductivity with its hydrophilic nature distinguishes MXene from other materials, and its properties and applications can be further modified by surface functionalization. MXene composites/hybrids outperform pristine MXenes in many applications. In addition, a summary of the latest findings using MXene-based materials to overcome application-specific drawbacks is provided in the last few sections. We hope that the information provided in this review will help integrate lab-scale findings into commercially viable products.
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摘要 :
Associated with the rapid development of 2D transition metal carbides,
nitrides, and carbonitrides (MXenes), MXene derivatives have been recently
exploited and exhibited unique physical/chemical properties, holding
promising ap...
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Associated with the rapid development of 2D transition metal carbides,
nitrides, and carbonitrides (MXenes), MXene derivatives have been recently
exploited and exhibited unique physical/chemical properties, holding
promising applications in the areas of energy storage and conversions. This
review provides a comprehensive summarization of the latest research and
progress on MXene derivatives, including termination-tailored MXenes,
single-atom implanted MXenes, intercalated MXenes, van der Waals atomic
layers, and non-van der Waals heterostructures. The intrinsic relationship
between structure, properties, and corresponding applications for MXene
derivatives are then emphasized. Finally, the essential challenges are
addressed and perspectives for the MXene derivatives are also discussed.
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The demand for green and clean technology motivates the research community to find a novel electrocatalyst for overall water-splitting. Therefore, in this study, we developed a hybrid non-noble metal catalyst nanocomposite of Ti3C...
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The demand for green and clean technology motivates the research community to find a novel electrocatalyst for overall water-splitting. Therefore, in this study, we developed a hybrid non-noble metal catalyst nanocomposite of Ti3C2-CoS2 (TC-CS) as a bifunctional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The nanocomposite shows crushed nanosheets of Ti3C2 sprinkle on the CoS2 (CS) surface thus increasing the electrochemically active surface area of the catalyst. The nanocomposite exhibits a low overpotential of 276 mV for HER and 376 mV for OER with a Tafel slope of 159 mV dec(-1) and 22 mV dec(-1). This new kind of MXene composite will create a revolution in future energy technology.
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Abstract Since the discovery of MXenes, research has progressed tremendously to explore MXenes with new compositions apart from the conventional Ti3C2Tx. Recently, the MXene family further expanded with the discovery of ordered do...
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Abstract Since the discovery of MXenes, research has progressed tremendously to explore MXenes with new compositions apart from the conventional Ti3C2Tx. Recently, the MXene family further expanded with the discovery of ordered double transition metal MXenes, wherein the metal sites are occupied by two different transition metals, which can be arranged in‐plane or out‐of‐plane forming i‐MXenes or o‐MXenes, respectively. The feature of optimizing the properties of ordered double transition metal MXenes by precise engineering of the composition, number of metal layers, interlayer spacing, and surface functionalities is distinctive among the existing 2D materials. This review provides a brief overview of the theoretical and experimental studies on the ordered double transition metal MXenes to elucidate its structure and properties. In addition, the recent trends in the synthesis and the effects of fine‐tuning the composition, structure, and functional groups on their electrochemical performance are elaborated. The current challenges faced by these emerging MXenes and future research directions are also proposed.
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Because of their peculiar two-dimensional layered microstruc-ture, the existence of numerous functionalities on the surface and excellent electrical, thermal and optical features, MXenes are regarded as promising candidates for so...
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Because of their peculiar two-dimensional layered microstruc-ture, the existence of numerous functionalities on the surface and excellent electrical, thermal and optical features, MXenes are regarded as promising candidates for solving energy and environment related problems. It is noted that energy conversion and storge capability of MXenes could be raised by altering their dimensions, structure, surface chemistry and chemical composition. Therefore, it is critical to recognize how one can boost the relationship between structure and property from applied viewpoint. In the present study, we reviewed the synthesis, properties and potential applications of MXenes. Furthermore, several properties of MXenes including structural, chemical, optical, mechanical and thermal have been explored. In addition, the potential applications of MXenes in various areas such as photocatalysis, gas sensing, supercapacitors, electrocatalysis and environmental remediation have also been discussed. Based on reported works, it can clearly be noticed that features and potential applications of MXenes may be further improved by applying many alteration and functionali-zation strategies. This study also focuses on the current progresses and future prospective relating to MXene based composites, which will surely assist the scientists who are doing work in areas of academia and material sciences.
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Abstract Recent advancement in nanotechnology has brought about the discovery of various nanomaterials such as graphene (GN), montmorillonites (MMT), carbon nanotubes (CNT), and very recently, MXene (MX). MX has attracted consider...
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Abstract Recent advancement in nanotechnology has brought about the discovery of various nanomaterials such as graphene (GN), montmorillonites (MMT), carbon nanotubes (CNT), and very recently, MXene (MX). MX has attracted considerable attention as a 2-dimensional (2-D) material because of its inherent superior properties such as large surface area, high aspect ratio, electrical, thermal, and mechanical disposition thereby enlarging its application as a multifunctional material. On the other hand, Polypyrrole (PPy) belongs to the genre of conducting polymers (CPs) which have attracted increasing attention due to its possession of good biocompatibility, inherently high conductivity, and ease of synthesis. In comparison with conductive polymers, PPy is commercially more viable and this has increased its extent of application as a material for medicals, secondary batteries, electrochemical sensors, amongst others. Generally, nanotechnological embedment of nanoparticles in polymeric matrices has resulted in the formation of polymeric nanocomposites with enhanced properties in comparison with the precursor materials. Hence, in order to achieve an enhanced usage in energy storage and enlarge the scope of application of these materials, various approaches are utilized in hybridizing conducting MXene with PPy in order to obtain a hybrid multifunctional material with enhanced electrochemical properties. Therefore, this paper elucidate the recent advancements in the preparation approaches of MXene/polypyrrole hybrid nanoarchitectonics for energy storage applications.Graphical Abstract
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