研究目的
To synthesize and structurally characterize SnTiO3 for the first time in bulk form, exploring its potential applications in ferroelectrics, photocatalysis, and beyond.
研究成果
Bulk SnTiO3 was synthesized for the first time, adopting an expanded ilmenite-derived structure with van der Waals gaps due to stereochemically active lone pairs of Sn2+. The material exhibits multiple stacking orders and twinning domains, with potential applications in ferroelectrics, photocatalysis, and other fields.
研究不足
The synthesis of SnTiO3 is challenging due to the low disproportionation temperature of Sn2+ oxides. The microstructure of SnTiO3 is heavily stacking faulted, making structural characterization complex.
1：Experimental Design and Method Selection:
A soft chemistry protocol was used to synthesize SnTiO3 at < 350°C, avoiding the disproportionation or oxidation of Sn2+.
2：2+. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: A layered potassium titanate precursor K2Ti2O5 was synthesized and then reacted with SnCl2 · 2 H2O.
3：2O. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: K2CO3, TiO2-nanoparticles (P25), SnCl2 · 2 H2O, SEM, STEM, EELS, NMR, XRPD.
4：Experimental Procedures and Operational Workflow:
The precursor was heated, ground with SnCl2 · 2 H2O, dehydrated, annealed, and washed to obtain SnTiO
5：Data Analysis Methods:
Rietveld refinement, DIFFaX-simulations, DFT calculations, EELS spectra analysis, solid-state NMR.
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