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Shidi Tang
Shidi Tang
Department of Chemistry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
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Yuanfu Deng
Yuanfu Deng
Department of Chemistry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
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ShuZhong Zhan
ShuZhong Zhan
Department of Chemistry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
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Abstract
A new heterobimetallic nitrilotriacetatoperoxotitanate complex of titanium and lead [Pb(H2O)3]2[Ti2(O2)2O(nta)2]·4H2O (C6H6O6N=H3nta) was isolated in pure crystals directly from the solution containing tetrabutyl orthotitanate, hydrogen peroxoide, lead acetate, and nitrilotriacetic acid at pH = 2.0–4.0. The isolated complex was characterized by elemental analyses, IR spectrum, thermal analysis (TG), and single-crystal X-ray diffraction. The single-crystal X-ray structural analysis revealed that the titanium atom is N,O,O′,O′′-chelated by the nitrilotriacetate and O,O′-chelated by the peroxo group and was coordinated to the bridging O atom in an overall pentagonal-bipyramidal geometry. The thermal decomposition of this precursor led to the formation of phase-pure lead titanate (PbTiO3) at ≥450 °C. The morphology, microstructure, and crystalline of the resulting PbTiO3 product have been characterized by BET, transmission electron microscopy, and powder X-ray diffraction. The TEM micrographs revealed that the size of the as-synthesized crystallines to be 50–100 nm range. The BET measurement revealed that the PbTiO3 powders had a surface area of 5.6 m2/g.
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