Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

The phase diagram and hardness of carbon nitrides

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep09870· OSTI ID:1184778
 [1];  [2];  [3];  [3]
  1. Stony Brook Univ., NY (United States). Dept. of Geosciences and Center for Materials by Design, Inst. for Advanced Computational Science; BROOKHAVEN SCIENCE ASSOCIATES, LLC
  2. Stony Brook Univ., NY (United States). Dept. of Geosciences and Center for Materials by Design, Inst. for Advanced Computational Science; Moscow Inst. of Physics and Technology (Russian Federation); Northwestern Polytechnical Univ., Xi'an (China). School of Materials Science]; Zhu, Qiang [Stony Brook Univ., NY (United States). Dept. of Geosciences and Center for Materials by Design, Inst. for Advanced Computational Science
  3. Stony Brook Univ., NY (United States). Dept. of Geosciences and Center for Materials by Design, Inst. for Advanced Computational Science
Novel superhard materials, especially those with superior thermal and chemical stability, are needed to replace diamond. Carbon nitrides (C-N), which are likely to possess these characteristics and have even been expected to be harder than diamond, are excellent candidates. Here we report three new superhard and thermodynamically stable carbon nitride phases. Based on a systematic evolutionary structure searches, we report a complete phase diagram of the C-N system at 0–300 GPa and analyze the hardest metastable structures. Surprisingly, we find that at zero pressure, the earlier proposed graphitic-C3N4 structure (P6-bar m2) is dynamically unstable, and we find the lowest-energy structure based on s-triazine unit and s-heptazine unit.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
Government of the Russian Federation; National Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704
OSTI ID:
1184778
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (46)

Ionothermal Synthesis of Crystalline, Condensed, Graphitic Carbon Nitride journal September 2008
Semiempirical GGA-type density functional constructed with a long-range dispersion correction journal January 2006
Structure and stability of carbon nitride under high pressure and high temperature up to 125GPa and 3000K journal October 2013
How Evolutionary Crystal Structure Prediction Works—and Why journal March 2011
Photodegradation Performance of g-C 3 N 4 Fabricated by Directly Heating Melamine journal September 2009
Anomalous piezoelectricity in two-dimensional graphene nitride nanosheets journal June 2014
A metal-free polymeric photocatalyst for hydrogen production from water under visible light journal November 2008
Polymorphic phases of sp 3 -hybridized superhard CN journal November 2012
Electronegativity Identification of Novel Superhard Materials journal June 2008
Comment on “Hardness of Covalent and Ionic Crystals: First-Principle Calculations” journal March 2007
Prediction of New Low Compressibility Solids journal August 1989
Evolutionary Crystal Structure Prediction as a Method for the Discovery of Minerals and Materials journal January 2010
High-Pressure Synthesis of Crystalline Carbon Nitride Imide, C2N2(NH) journal February 2007
gt-C 3 N 4 -The First Stable Binary Carbon(IV) Nitride journal August 2014
Equation of state and phase stability of turbostratic carbon nitride journal August 2003
A review of the preparation of carbon nitride films journal October 1999
New developments in evolutionary structure prediction algorithm USPEX journal April 2013
Experimental study on the stability of graphitic C3N4 under high pressure and high temperature journal May 2011
A novel application of g-C3N4 thin film in photoelectrochemical anticorrosion journal January 2013
Modeling hardness of polycrystalline materials and bulk metallic glasses journal September 2011
Polymeric Graphitic Carbon Nitride for Heterogeneous Photocatalysis journal July 2012
A Novel Superhard Tetragonal Carbon Mononitride journal January 2014
Electronic and Structural Properties of Two-Dimensional Carbon Nitride Graphenes journal March 2008
Tri-s-triazine derivatives. Part I. From trichloro-tri-s-triazine to graphitic C3N4 structuresPart II: Alkalicyamelurates M3[C6N7O3], M = Li, Na, K, Rb, Cs, manuscript in preparation. journal April 2002
Shock synthesis and characterization of new diamond-like carbon nitrides journal January 2004
Corrugated layered heptazine-based carbon nitride: the lowest energy modifications of C3N4 ground state journal January 2009
A novel low compressible and superhard carbon nitride: Body-centered tetragonal CN2 journal January 2012
Synthesis of superhard cubic BC2N journal March 2001
Predicting hardness of dense C3N4 polymorphs journal March 2006
Crystal structure prediction using ab initio evolutionary techniques: Principles and applications journal June 2006
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Density-functional theory investigation of hardness, stability, and electron-energy-loss spectra of carbon nitrides with C 11 N 4 stoichiometry journal January 2002
Symmetry-general least-squares extraction of elastic data for strained materials from ab initio calculations of stress journal February 2002
Strain dependent bonding in solid C 3 N 4 : High elastic moduli but low strength journal February 2006
Most likely phase of superhard BC 2 N by ab initio calculations journal September 2007
First-principles calculations of the ferroelastic transition between rutile-type and CaCl 2 -type SiO 2 at high pressures journal October 2008
Superhard semiconducting C 3 N 2 compounds predicted via first-principles calculations journal December 2008
Evolutionary search for superhard materials: Methodology and applications to forms of carbon and TiO 2 journal September 2011
Strong excitonic effects in the optical properties of graphitic carbon nitride g -C 3 N 4 from first principles journal February 2013
Electronegativity Identification of Novel Superhard Materials journal June 2008
Generalized Gradient Approximation Made Simple journal October 1996
Hardness of Covalent Crystals journal July 2003
Hardness of Covalent and Ionic Crystals: First-Principle Calculations journal March 2006
Low-Compressibility Carbon Nitrides journal January 1996
Metastable host-guest structure of carbon journal July 2014

Cited By (11)

Cubic C3N: A New Superhard Phase of Carbon-Rich Nitride journal October 2016
Investigation on the Stability of Derivative Melam from Melamine Pyrolysis under High Pressure journal March 2018
Nitrogen oxides under pressure stability, ionization, polymerization, and superconductivity preprint January 2015
(L) 2 C 2 P 2 : Dicarbondiphosphide Stabilized by N-Heterocyclic Carbenes or Cyclic Diamido Carbenes journal April 2017
(L) 2 C 2 P 2 : Dicarbondiphosphide Stabilized by N-Heterocyclic Carbenes or Cyclic Diamido Carbenes journal April 2017
Ferroelectricity and Elasticity of Rhombohedral BiFeO 3 Under Uniaxial Stress journal February 2018
Pharaoh's Serpents: New Insights into a Classic Carbon Nitride Material: Pharaoh's Serpents: New Insights into a Classic Carbon Nitride Material journal October 2017
Alkaline-earth metal (Mg) polynitrides at high pressure as possible high-energy materials journal January 2017
Carbon nitrides: synthesis and characterization of a new class of functional materials journal January 2017
One step synthesis of efficient photocatalysts by TCAP doped g-C 3 N 4 for enhanced visible-light photocatalytic activity journal January 2020
Ground-state structures, physical properties and phase diagram of carbon-rich nitride C 5 N journal August 2018

Similar Records

Hydrazone-Linked Heptazine Polymeric Carbon Nitrides for Synergistic Visible-Light-Driven Catalysis
Journal Article · Mon Jun 01 20:00:00 EDT 2020 · Chemistry - A European Journal · OSTI ID:1632322

Advanced processing and properties of superhard materials
Book · Thu Jun 01 00:00:00 EDT 1995 · OSTI ID:55363

Synthesis of Ultra‐Incompressible and Recoverable Carbon Nitrides Featuring CN 4 Tetrahedra
Journal Article · Sat Dec 09 19:00:00 EST 2023 · Advanced Materials · OSTI ID:2580525

Related Subjects