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Title: Combined Theoretical and in Situ Scattering Strategies for Optimized Discovery and Recovery of High-Pressure Phases: A Case Study of the GaN–Nb 2 O 5 System

Journal Article · · Inorganic Chemistry

The application of pressure in solid-state synthesis provides a route for the creation of new and exciting materials. However, the onerous nature of high-pressure techniques limits their utility in materials discovery. The systematic search for novel oxynitrides—semiconductors for photocatalytic overall water splitting—is a representative case where quench high-pressure synthesis is useful and necessary in order to obtain target compounds. We utilize state of the art crystal structure prediction theory (USPEX) and in situ synchrotron-based X-ray scattering to speed up the discovery and optimization of novel compounds using high-pressure synthesis. Using this approach, two novel oxynitride phases were discovered in the GaN–Nb2O5 system. The (Nb2O5)0.84:(NbO2)0.32:(GaN)0.82 rutile structured phase was formed at 1 GPa and 900 °C and gradually transformed to a α-PbO2-related structure above 2.8 GPa and 1000 °C. The low-pressure rutile type phase was found to have a direct optical band gap of 0.84 eV and an indirect gap of 0.51 eV.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI ID:
1322344
Journal Information:
Inorganic Chemistry, Vol. 55, Issue 7; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
ENGLISH

References (67)

Materials Chemistry under High Pressures – Some Recent Aspects journal December 2006
Festkörperchemie bei hohen Drücken journal December 1976
New synthetic discoveries via high-pressure solid-state chemistry journal January 2011
Pressure Tuning in the Search for New and Improved Solid State Materials journal October 1998
Synthesis and characterization of a binary noble metal nitride journal April 2004
Unexpected Stable Stoichiometries of Sodium Chlorides journal December 2013
Anomalous optical and electronic properties of dense sodium journal April 2009
Evidence of maximum in the melting curve of hydrogen at megabar pressures journal April 2009
Evolutionary Crystal Structure Prediction as a Method for the Discovery of Minerals and Materials journal January 2010
Evolutionary crystal structure prediction as a tool in materials design journal January 2008
Ionic high-pressure form of elemental boron journal January 2009
Transparent dense sodium journal March 2009
Equation of state and phase stability of turbostratic carbon nitride journal August 2003
Crystals from first principles journal September 1988
Solid-State Chemistry: A A Rediscovered Chemical Frontier journal February 1990
USPEX—Evolutionary crystal structure prediction journal December 2006
Data Mined Ionic Substitutions for the Discovery of New Compounds journal January 2011
First principles high throughput screening of oxynitrides for water-splitting photocatalysts journal January 2013
Predicting Crystal Structures with Data Mining of Quantum Calculations journal September 2003
High Pressure and Chemical Bonding in Materials Chemistry journal July 2006
Synthesis and properties of functional oxynitrides – from photocatalysts to CMR materials journal January 2010
New Non-Oxide Photocatalysts Designed for Overall Water Splitting under Visible Light journal June 2007
Oxynitride materials for solar water splitting journal January 2011
Effect of post-calcination on photocatalytic activity of (Ga1−xZnx)(N1−xOx) solid solution for overall water splitting under visible light journal March 2008
MnTaO 2 N: Polar LiNbO 3 -type Oxynitride with a Helical Spin Order journal November 2014
High-pressure synthesis of some perovskite — Like compounds with a mixed anion type journal April 1995
Direct Solid-State Synthesis at High Pressures of New Mixed-Metal Oxynitrides: RZrO 2 N (R = Pr, Nd, and Sm) journal December 2009
Spinel-Structured Gallium Oxynitride (Ga 3 O 3 N) Synthesis and Characterization:  An Experimental and Theoretical Study journal September 2005
High-Pressure Synthesis of a Gallium Oxonitride with a Spinel-Type Structure journal August 2005
High-Pressure Synthesis, Electron Energy-Loss Spectroscopy Investigations, and Single Crystal Structure Determination of a Spinel-Type Gallium Oxonitride Ga 2.790.21 (O 3.05 N 0.760.19 ) journal April 2009
A Systematic Investigation of the Stability Field of Spinel-type Gallium Oxonitrides journal October 2009
In Situ XRD Studies of ZnO/GaN Mixtures at High Pressure and High Temperature: Synthesis of Zn-Rich (Ga 1− x Zn x )(N 1− x O x ) Photocatalysts journal January 2010
Crystal structure of moganite-type phosphorus oxynitride: relationship to other twinned-quartz-based structures journal October 1999
An Unprecedented AB 2 Tetrahedra Network Structure Type in a High-Pressure Phase of Phosphorus Oxonitride (PON) journal March 2012
Superhard Monoclinic Polymorph of Carbon journal April 2009
Exotic behavior and crystal structures of calcium under pressure journal April 2010
First-Principles Determination of the Structure of Magnesium Borohydride journal December 2012
Fe–C and Fe–H systems at pressures of the Earth's inner core journal May 2012
Prediction of stable hafnium carbides: Stoichiometries, mechanical properties, and electronic structure journal December 2013
Stability of xenon oxides at high pressures journal November 2012
Novel stable compounds in the Mg–O system under high pressure journal January 2013
Interstitial-boron solution strengthened WB 3+ x journal October 2013
Computational materials discovery: the case of the W–B system journal January 2014
Evolutionary search for new high-k dielectric materials: methodology and applications to hafnia-based oxides journal January 2014
Anion order in perovskite oxynitrides journal November 2010
Principles and Applications of Anion Order in Solid Oxynitrides journal August 2013
Thermally Robust Anion-Chain Order in Oxynitride Perovskites journal December 2013
Anion-ordered chains in a d1 perovskite oxynitride: NdVO2N journal January 2013
Synthesis, anion order and magnetic properties of RVO3−xNx perovskites (R = La, Pr, Nd; 0 ≤ x ≤ 1) journal January 2014
First Refinement of the Sinoite Structure of a Natural Crystal from the Neuschwanstein (EL6) Meteorite journal December 2005
High-pressure neutron diffraction study of Si 2 N 2 O journal June 1977
Crystal Structure and Electron Density of Tantalum Oxynitride, a Visible Light Responsive Photocatalyst journal February 2007
Crystal structure prediction using ab initio evolutionary techniques: Principles and applications journal June 2006
How Evolutionary Crystal Structure Prediction Works—and Why journal March 2011
New developments in evolutionary structure prediction algorithm USPEX journal April 2013
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
Generalized Gradient Approximation Made Simple journal October 1996
Efficient pseudopotentials for plane-wave calculations journal January 1991
EXPGUI , a graphical user interface for GSAS journal April 2001
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides journal September 1976
Synthesis and Characterization of Visible Light Absorbing (GaN) 1– x (ZnO) x Semiconductor Nanorods journal July 2013
Photocatalytic hydrogen evolution using nanocrystalline gallium oxynitride spinel journal January 2014
The luminescence of the high-pressure modification of gallium niobate (GaNbO4) journal April 1981
Preparation-method-dependent morphological, band structural, microstructural, and photocatalytic properties of noble metal–GaNbO4 nanocomposites journal January 2013
The Role of Pressure in Producing Compositional Diversity in Intraplate Basaltic Magmas journal November 2006
Electronic absorption by Ti 3+ ions and electron delocalization in synthetic blue rutile journal May 1998

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