Formation and aspect ratio control of rhabdophane-type yttrium orthophosphate hexagonal prism particles synthesized by a citrate-assisted hydrothermal process. Issue 16 (8th April 2022)

• Record Type: Journal Article
• Authors: Shiba, Fumiyuki; Fujiwara, Takumi; Takeda, Yamato; Okawa, Yusuke
• Is Part Of: CrystEngComm. Volume 24:Issue 16(2022)
• Page Start: 2958
• Page End: 2965
• Publication Date: 2022-04-08
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d2ce00276k
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : The rhabdophane-type YPO4 particles have been synthesized in the presence of citrate ions under systematically varied reaction conditions. Abstract : Rhabdophane-type yttrium orthophosphate particles were prepared in an aqueous phase with trisodium citrate (Na3 -Cit) under systematically varied conditions. The obtained rhabdophane-type YPO4 particles were basically in a hexagonal prism shape, reflecting its hexagonal crystal structure. The prism's width and height differed depending on the reaction conditions. A higher Na3 -Cit concentration led to a lower prism height, whereas a higher pH similarly decreased the width and height. The growth kinetics suggested that the rhabdophane-type YPO4 particles grew in the surface-reaction-controlled growth mode. The activation energies of the growth, estimated by the Arrhenius plots in the range of 95–120 °C, were slightly different between the width and the height directions, resulting in the temperature-dependent shape of the hexagonal prism. Also, Tb 3+ ions were doped into the rhabdophane-type YPO4 particles to observe photoluminescence.