Viscosity-dependent hydrothermal synthesis of multinary titanate perovskites.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40173226.
- Also identified by DOI 10.1126/sciadv.adu2476 and PMC identifier 11963982.
- Licence recorded as CC BY-NC.
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Abstract
An innovative viscosity-dependent hydrothermal strategy is developed for the controlled synthesis of multinary titanate perovskites, specifically Na<sub>0.5</sub>Y<sub>0.39</sub>Yb<sub>0.1</sub>Er<sub>0.01</sub>TiO<sub>3</sub>. By manipulating the viscosity of the reaction solution using various stable additives in both type and quantity, we identify a critical viscosity threshold of ~100 centipoise, which is essential for producing uniform faceted particles. With sodium hydroxide as an additive, a clear morphological evolution occurs as hydroxide concentration increases, shifting from regular cubes to edge-truncated, half-corner-truncated, and fully corner-truncated cube particles. Furthermore, the inclusion of additional sodium chloride and acetate substantially increases the viscosity, facilitating the formation of uniform faceted particles with reduced sizes ranging from ~2.0 micrometers to 200 nanometers. This method is successfully applied to synthesize other uniform perovskites, including Na<sub>0.5</sub>Y<sub>0.395</sub>Yb<sub>0.1</sub>Tm<sub>0.005</sub>TiO<sub>3</sub>, Na<sub>0.5</sub>Y<sub>0.4</sub>Eu<sub>0.1</sub>TiO<sub>3</sub>, Na<sub>0.5</sub>Y<sub>0.39</sub>Yb<sub>0.1</sub>Ho<sub>0.01</sub>TiO<sub>3</sub>, and Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>. Our findings provide valuable insights into viscosity-controlled synthesis for creating multinary perovskites and enhance their potential for designing optical functional materials and advancing various applications in optical temperature sensing, anti-counterfeiting security, and fingerprint recognition.