Effect of surface composition on the stability of Ti- and V-based oxycarbide and oxynitride MXenes DOI Creative Commons
José D. Gouveia, José R. B. Gomes

Materials Today Physics, Год журнала: 2024, Номер 46, С. 101481 - 101481

Опубликована: Июнь 13, 2024

Oxycarbide MXenes were recently experimentally identified, opening up the possibility of a vast majority carbon-based synthesised to date being in fact oxycarbides, wherein some substitutional oxygen atoms are present amid layers that previously thought contain carbon only. Here, using an approach based on density-functional theory, we study structural, energetic and electronic properties subsurface X form M2XT2, with M = Ti, V; C, N; T none, O or F. According calculations, is thermodynamically stable any concentration all analysed MXenes. Subsurface Ti2C MXene driven towards surface, leaving behind vacancies creating local surface terminations. Given this process involves very low energy barrier, predict that, under conditions suitable for eliminating termination MXenes, many should occur. The O-terminated carbide Ti2CO2 V2CO2, their hexagonal symmetry threshold amount O, around 75 %, which above maximum observed concentration, 65 %. F stabilizes structure no longer distort regardless presence oxygen. This suggests synthesis routes fluorine-containing compounds most indicated synthesising nitride PBE functional predicts semiconductor characteristics be lost even percentage as 6 lowest considered work. hybrid HSE06 oxycarbide material remain semiconductor, but significantly lowered band gap increasing content. Nevertheless, both functionals agree mixture C between Ti increases its conductivity. To best our knowledge, has never been confirmed behave probably because real samples

Язык: Английский

MXenes-based adsorbents for environmental remediation DOI
Qiang Li,

Chunbing Ge,

J. Ma

и другие.

Separation and Purification Technology, Год журнала: 2024, Номер 342, С. 126982 - 126982

Опубликована: Март 4, 2024

Язык: Английский

Процитировано

37

MXene Key Composites: A New Arena for Gas Sensors DOI Creative Commons
Yitong Wang, Yuhua Wang,

Min Jian

и другие.

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Июнь 6, 2024

Abstract With the development of science and technology, scale industrial production continues to grow, types quantities gas raw materials used in produced during process are also constantly increasing. These gases include flammable explosive gases, even contain toxic gases. Therefore, it is very important necessary for sensors detect monitor these quickly accurately. In recent years, a new two-dimensional material called MXene has attracted widespread attention various applications. Their abundant surface functional groups sites, excellent current conductivity, tunable chemistry, outstanding stability make them promising sensor Since birth materials, researchers have utilized efficient convenient solution etching preparation, high flexibility, easily functionalize with other prepare composites sensing. This opened chapter high-performance sensing provided approach advanced research. However, previous reviews on MXene-based composite only focused performance sensing, without systematically explaining mechanisms generated by different as well summarizing predicting advantages disadvantages materials. article latest progress application Firstly, brief summary was given commonly methods preparing device structures, followed an introduction key attributes related performance. focuses such MXene/graphene, MXene/Metal oxide, MXene/Transition metal sulfides (TMDs), MXene/Metal–organic framework (MOF), MXene/Polymer. It summarizes discusses possible Finally, future directions inroads MXenes-based presented discussed.

Язык: Английский

Процитировано

35

Resistive Gas Sensors Based on 2D TMDs and MXenes DOI

Ali Mirzaei,

Jin‐Young Kim, Hyoun Woo Kim

и другие.

Accounts of Chemical Research, Год журнала: 2024, Номер 57(16), С. 2395 - 2413

Опубликована: Авг. 5, 2024

ConspectusGas sensors are used in various applications to sense toxic gases, mainly for enhanced safety. Resistive particularly popular owing their ability detect trace amounts of high stability, fast response times, and affordability. Semiconducting metal oxides commonly employed the fabrication resistive gas sensors. However, these often require working temperatures, bringing about increased energy consumption reduced selectivity. Furthermore, they do not have enough flexibility, performance is significantly decreased under bending, stretching, or twisting. To address challenges, alternative materials capable operating at lower temperatures with flexibility needed. Two-dimensional (2D) such as MXenes transition-metal dichalcogenides (TMDs) offer surface area conductivity unique 2D structure, making them promising candidates realization Nevertheless, sensing pristine form typically weak unacceptable, terms response, selectivity, recovery time (

Язык: Английский

Процитировано

25

MXene nanomaterials: Synthesis, properties and applications in energy and environment sector DOI
Sami Ullah, Tayyaba Najam, Aziz ur Rehman

и другие.

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1001, С. 175172 - 175172

Опубликована: Июнь 12, 2024

Язык: Английский

Процитировано

23

Hydrogen‐Bonded Organic Framework Derived 2D N, O Co‐Doped Carbon Nanobelt with Tunable Pseudocapacitive Contribution for Efficient Capacitive Deionization DOI
Fanyue Meng, Yong Liu,

Zibiao Ding

и другие.

Small, Год журнала: 2023, Номер 20(21)

Опубликована: Дек. 14, 2023

Abstract Defect engineering is recognized as an attractive method for modulating the electronic structure and physicochemical characteristics of carbon materials. Exploiting heteroatom‐doped porous with copious active sites has attracted great attention capacitive deionization (CDI). However, traditional methods often rely on utilization additional heteroatom sources strong corrosive activators, suffering from low doping efficiency, insufficient level, potential biotoxicity. Herein, hydrogen‐bonded organic frameworks (HOFs) are employed precursors to synthesize N, O co‐doped via a simple green reverse defect strategy, achieving controllable heavy heteroatoms. The co‐doping triggers significant pseudocapacitive contribution surface pore supports formation electric double layer. Therefore, when HOF‐derived used CDI electrodes, superior salt adsorption capacity 32.29 ± 1.42 mg g −1 outstanding maximum rate 10.58 0.46 min at 1.6 V in 500 L NaCl solution achieved, which comparable those state‐of‐the‐art carbonaceous electrodes. This work exemplifies effectiveness nitrogen‐heavy strategy improving structure, shedding light further development rational designed electrode materials CDI.

Язык: Английский

Процитировано

40

In situ construction of Sn-based metal–organic frameworks on MXene achieving fast electron transfer for rapid lithium storage DOI
Zihao Yang,

Chaocang Weng,

Xiaoyan Gao

и другие.

Chemical Engineering Journal, Год журнала: 2024, Номер 486, С. 150299 - 150299

Опубликована: Март 11, 2024

Язык: Английский

Процитировано

15

Next generation MXene based materials for Electrochemical Sensor: A critical review DOI
Sultan Ullah, Muhammad Altaf Nazir,

Muhammad Adnan Saeed

и другие.

Journal of Molecular Structure, Год журнала: 2024, Номер 1321, С. 139830 - 139830

Опубликована: Авг. 28, 2024

Язык: Английский

Процитировано

12

Wideband, polarization-insensitive rectangular-shaped with thin wire MXene-based resonator solar absorber for solar energy harvesting application DOI

Raj Agravat,

Shobhit K. Patel, Osamah Alsalman

и другие.

International Journal of Thermal Sciences, Год журнала: 2024, Номер 204, С. 109249 - 109249

Опубликована: Июль 8, 2024

Язык: Английский

Процитировано

10

Enhanced n-butanol sensing performance of metal-organic frameworks-derived Cr2O3/MXene composites DOI
Wangchang Geng, Pengfei Song, Tingting Xie

и другие.

Applied Surface Science, Год журнала: 2024, Номер 669, С. 160571 - 160571

Опубликована: Июнь 19, 2024

Язык: Английский

Процитировано

9

MXene-based anode materials for high performance sodium-ion batteries DOI
Junfeng Li, Hao Liu, Xudong Shi

и другие.

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 658, С. 425 - 440

Опубликована: Дек. 15, 2023

Язык: Английский

Процитировано

19