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Title: 2D molybdenum and vanadium nitrides synthesized by ammoniation of 2D transition metal carbides (MXenes)

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/C7NR06721F· OSTI ID:1433989
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3];  [1]; ORCiD logo [1]; ORCiD logo [4]; ORCiD logo [1]
  1. Drexel Univ., Philadelphia, PA (United States). A. J. Drexel Nanotechnology Inst., and Dept. of Materials Science & Engineering
  2. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  4. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics; Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

MXenes are a rapidly growing class of 2D transition metal carbides and nitrides, finding applications in fields ranging from energy storage to electromagnetic interference shielding and transparent conductive coatings. However, while more than 20 carbide MXenes have already been synthesized, Ti4N3 and Ti2N are the only nitride MXenes reported so far. Here by ammoniation of Mo2CTx and V2CTx MXenes at 600 °C, we report on their transformation to 2D metal nitrides. Carbon atoms in the precursor MXenes are replaced with N atoms, resulting from the decomposition of ammonia molecules. The crystal structures of the resulting Mo2N and V2N were determined with transmission electron microscopy and X-ray pair distribution function analysis. Our results indicate that Mo2N retains the MXene structure and V2C transforms to a mixed layered structure of trigonal V2N and cubic VN. Temperature-dependent resistivity measurements of the nitrides reveal that they exhibit metallic conductivity, as opposed to semiconductor-like behavior of their parent carbides. As important, room-temperature electrical conductivity values of Mo2N and V2N are three and one order of magnitude larger than those of the Mo2CTx and V2CTx precursors, respectively. In conclusion, this study shows how gas treatment synthesis such as ammoniation can transform carbide MXenes into 2D nitrides with higher electrical conductivities and metallic behavior, opening a new avenue in 2D materials synthesis.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; DMR-1310245; DMR-1420634
OSTI ID:
1433989
Report Number(s):
BNL-203531-2018-JAAM; NANOHL
Journal Information:
Nanoscale, Vol. 9, Issue 45; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 209 works
Citation information provided by
Web of Science

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Tuning Thermal Transport Through Atomically Thin Ti 3 C 2 T z MXene by Current Annealing in Vacuum journal March 2019
Scalable Synthesis of Ultrathin Mn 3 N 2 Exhibiting Room‐Temperature Antiferromagnetism journal February 2019
Promoting Role of MXene Nanosheets in Biomedical Sciences: Therapeutic and Biosensing Innovations journal October 2018
Electronic and Optical Properties of 2D Transition Metal Carbides and Nitrides (MXenes) journal November 2018
Atmospheric-Pressure Synthesis of 2D Nitrogen-Rich Tungsten Nitride journal October 2018
Sandwich‐Like Ultrathin TiS 2 Nanosheets Confined within N, S Codoped Porous Carbon as an Effective Polysulfide Promoter in Lithium‐Sulfur Batteries journal July 2019
Two‐Dimensional Electrocatalysts for Efficient Reduction of Carbon Dioxide journal October 2019
Two‐Dimensional Transition Metal Carbides and Nitrides (MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications journal March 2020
Two‐dimensional MXenes for lithium‐sulfur batteries journal January 2020
Control of MXenes’ electronic properties through termination and intercalation journal January 2019
Metallic MoN ultrathin nanosheets boosting high performance photocatalytic H 2 production journal January 2018
Novel two-dimensional tetragonal vanadium carbides and nitrides as promising materials for Li-ion batteries journal January 2019
Synergetic enhancement of polysulfide chemisorption and electrocatalysis over bicontinuous MoN@N-rich carbon porous nano-octahedra for Li–S batteries journal January 2019
Recent developments in emerging two-dimensional materials and their applications journal January 2020
Strain-tunable electronic structures and optical properties of semiconducting MXenes journal June 2019
A low‐cost and efficient pathway for preparation of 2D MoN nanosheets via Na 2 CO 3 ‐assisted nitridation of MoS 2 with NH 3 journal June 2019
Realization of 2D crystalline metal nitrides via selective atomic substitution journal January 2020
Realization of 2D Crystalline Metal Nitrides via Selective Atomic Substitution preprint January 2019