Diffusion doping of cobalt in rod-shape anatase TiO2 nanocrystals leads to antiferromagnetism
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چکیده
منابع مشابه
Green synthesis of shape-defined anatase TiO2 nanocrystals wholly exposed with {001} and {100} facetsw
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Green synthesis of shape-defined anatase TiO2 nanocrystals wholly exposed with {001} and {100} facets.
Anatase TiO(2) nanocuboids wholly exposed with high-energy {001} and {100} facets were successfully synthesized by a novel, environmentally benign synthetic strategy using acid-delaminated vermiculite (DVMT) and tetramethylammonium hydroxide as synergistic morphology-controlling reagents, where the DVMT layers act as effective hard template selectively stabilizing the {001} facets of TiO(2).
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Using complementary experiments we show that the room temperature ferromagnetism observed in anatase Co:TiO(2) films is not carrier mediated, but coexists with the dielectric state. TEM and x-ray absorption spectroscopy reveal a solid solution of Co in anatase, where Co is not metallic but in the +2 state substituting for Ti. Measurements at 300 K yield a M(S) of 1.1 mu(B)/Co atom, while all fi...
متن کاملRETRACTED: Effects of N Doping on Structure and Improvement Photocatalytic Properties of Anatase TiO2 Nanoparticles
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Synergistic effects of nonmetal co-doping with sulfur in anatase TiO2: a DFT + U study.
Using DFT + U calculations, the crystal structure and electronic properties of nonmetal co-doping with sulfur in anatase TiO2 are systematically investigated. The initial purpose of this work is to improve the photocatalytic performance of S mono-doped TiO2, in which S occupies the lattice Ti site and acts as a recombination center. Among eight nonmetal impurities that occupy the interstitial s...
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ژورنال
عنوان ژورنال: Nanoscale Advances
سال: 2020
ISSN: 2516-0230
DOI: 10.1039/d0na00640h