Year: 2025
Type: article
Abstract: An innovative viscosity-dependent hydrothermal strategy is developed for the controlled synthesis of multinary titanate perovskites, specifically Na 0.5 Y 0.39 Yb 0.1 Er 0.01 TiO 3 . 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 0.5 Y 0.395 Yb 0.1 Tm 0.005 TiO 3 , Na 0.5 Y 0.4 Eu 0.1 TiO 3 , Na 0.5 Y 0.39 Yb 0.1 Ho 0.01 TiO 3 , and Na 0.5 Bi 0.5 TiO 3 . 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.
Source: Science Advances
Authors: Hong-Bo Cui, Guijian Guan, Ming-Yong Han
Institution: Tianjin University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,500
Funder: Tianjin University
OpenAlex ID: W4409094564