New materials synthesis: Characterization of some metal-doped antimony oxides |
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| Institution: | 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;2. Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China;3. Instrumental Analysis and Research Center, Shanghai University, Shanghai 200444, China;1. Department of Cardiac Surgery, Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada;2. Department of Cardiology, Hopital Sacre-Coeur de Montreal, University of Montreal, Montreal, Quebec, Canada;1. College of Chemistry and Materials Science, Ludong University, Yantai 264025, China;2. School of Chemistry and Material Engineering, Changzhou Vocational Institute of Engineering, Changzhou 213164, China;3. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China |
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| Abstract: | In order to understand the chemistry of altermetal dopants in antimony oxide, the detailed structural characterization of two β-Sb2O4 compounds is reported, Mo-doped β-Sb2O4 (1.5 metal%) and V-doped β-Sb2O4 (5 metal%). The methods used to characterize these materials are X-ray and neutron diffraction, scanning electron microscopy, Mo K-edge extended X-ray absorption fine structure spectroscopy, and elemental analysis. The atomic position of each of these dopants in Sb2O4 is radically different as is the overall effect on the host structure. Molybdenum does not substitute for Sb atoms, rather the Mo atoms are found in channels of electron density formed by Sb3+ lone pairs. The two nearest Sb3+ are absent and the oxygen stoichiometry is preserved. The formula is Sb1.97Mo0.015O4. Vanadium incorporates substitutionally for the Sb3+ atoms and there are random oxygen vacancies in the resultant structure. The formula is Sb1.9V0.1O3.67. In each case the atomic positions of the host structure (Sb and O) are remarkably unaltered. The β-Sb2O4 structure can accommodate Mo and V simultaneously, presumably both means of metal incorporation are employed in this ternary oxide. |
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