Microwave-assisted synthesis of rare-earth phosphates: understanding structure evolution and morphology control.

Abstract

Rare-earth phosphates (REPO4) have attracted increasing attention owing to their superior thermal and chemical stability, low water solubility, biocompatibility, and optical properties, making them promising candidates for applications including scintillators, thermophosphors, and nuclear waste immobilization. The functional performance of REPO4 strongly depends on the particle size, morphology, and crystal structure, motivating the development of synthesis strategies that enable precise structural control. Among the available approaches, microwave (MW)-assisted synthesis has emerged as an efficient route due to its rapid and homogeneous heating, shortened reaction duration, and high reproducibility. This mini-review outlines an overview of recent advances in the MW-assisted synthesis of REPO4 materials under both atmospheric-pressure and pressurized conditions. Particular emphasis is placed on understanding how key synthesis parameters influence phase evolution, particle growth, and morphology development. Recent studies demonstrate that MW-assisted synthesis enables access to diverse REPO4 morphologies, including nanorods, nanowires, spheres, nanotubes, and cubic nanoparticles, while also allowing control over polymorphic transitions among rhabdophane, monazite, and xenotime structures. Overall, this review aims to provide insights into the rational design and controlled fabrication of high-performance REPO4 materials through MW-assisted approaches.

Abstract as supplied by the indexing source. © the authors / publisher.