Hydrolysis of bis(dimethylamido)tin to tin (II) oxyhydroxide and its selective transformation into tin (II) or tin (IV) oxide
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
KAUST Solar Center (KSC)
Chemical Science Program
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AbstractSn6O4(OH)4, a hydrolysis product of Sn(NMe2)2, is transformed to tin (II) or tin (IV) oxide by solid and solution phase processing. Tin (II) oxide is formed by heating Sn6O4(OH)4 at ≤200 °C in air or under inert atmosphere. Tin (IV) oxide nanoparticles are formed in the presence of a carboxylic acid and base in air at room temperature. IR spectroscopy, Raman spectroscopy, thermogravimetry (coupled with infrared spectroscopy), powder X-ray diffraction, high temperature X-ray diffraction, scanning electron and transmission electron microscopy are used for the characterization of Sn6O4(OH)4 and the investigation of its selective decomposition into SnO or SnO2. Spectroscopic and X-ray diffraction results indicate that SnO is formed by the removal of water from crystalline Sn6O4(OH)4. SEM shows octahedral morphology of the Sn6O4(OH)4, SnO and SnO2 with particle size from 400 nm-2 μm during solid state conversion. Solution phase transformation of Sn6O4(OH)4 to SnO2 occurs in the presence of potassium glutarate and oxygen. SnO2 particles are 15-20 nm in size.
SponsorsResearch reported in this publication was supported by the King Abdullah University of Science & Technology (KAUST) baseline and AEA funding. We thank the analytical core lab and advanced nano-fabrication, imaging and characterization lab personnel of KAUST for generous access to the facility and help in the IR, Raman and SEM analysis. J.K. thanks Dr. Ali R. Behzad for helping in SnO<INF>2</INF> imaging by SEM, Dr. Rachid Sougrat and Ms. Nini Wei for TEM imaging and Dr. Ejaz Ahmed for his comments during the preparation of the manuscript.
JournalInorganica Chimica Acta