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Synthesis and Crystal Structure of Rutile‐type ScTa 2 O 5 N
Author(s) -
Cosgun Sevilay,
Rohloff Martin,
Göbel Caren,
Gernert Ulrich,
Fischer Anna,
Lerch Martin
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400325
Subject(s) - tetragonal crystal system , rutile , materials science , physisorption , amorphous solid , crystal structure , phase (matter) , crystal (programming language) , crystallography , oxide , band gap , mineralogy , chemical engineering , chemistry , metallurgy , optoelectronics , adsorption , programming language , organic chemistry , computer science , engineering
Abstract A new phase in the system Sc‐Ta‐O‐N was synthesized by reaction of an amorphous oxide precursor with a gaseous NH 3 /O 2 mixture at 800 °C. Crystal structure determination was performed using X‐ray powder data. ScTa 2 O 5 N crystallizes in the tetragonal space group P 4 2 / mnm (rutile‐type structure) and exhibits a brilliant yellow color (optical bandgap: 2.67 eV), making it a promising material for photocatalytical water splitting. Further investigation methods (SEM, TEM, and N 2 ‐physisorption) were applied for more detailed characterization of the new phase. Unfortunately, the new compound could not be prepared as pure phase. So far a phase purity of ca. 90 % was the best result.