Phase-Tunable Synthesis of Monodisperse YPO4:Ln3+ (Ln = Ce, Eu, Tb) Micro/Nanocrystals via Topotactic Transformation Route with Multicolor Luminescence Properties

Baiqi Shao; Yang Feng; Shuang Zhao; Senwen Yuan; Jiansheng Huo; Wei Lü; Hongpeng You

doi:10.1021/acs.inorgchem.7b00083

Phase-Tunable Synthesis of Monodisperse YPO₄:Ln³⁺ (Ln = Ce, Eu, Tb) Micro/Nanocrystals via Topotactic Transformation Route with Multicolor Luminescence Properties

Inorg Chem. 2017 Jun 5;56(11):6114-6121. doi: 10.1021/acs.inorgchem.7b00083. Epub 2017 May 9.

Authors

Baiqi Shao¹, Yang Feng^{1

2}, Shuang Zhao^{1

2}, Senwen Yuan¹, Jiansheng Huo^{1

2}, Wei Lü¹, Hongpeng You¹

Affiliations

¹ State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P. R. China.
² University of the Science and Technology of China , Hefei 230026, P. R. China.

PMID: 28485928
DOI: 10.1021/acs.inorgchem.7b00083

Abstract

A novel aqueous-based and phase-selected synthetic strategy toward YPO₄:Ln³⁺ (Ln = Ce, Eu, Tb) micro/nanocrystals was developed by selecting specific precursors whose structure topotactically matches with the target ones. It was found that layered yttrium hydroxide (LYH) induced the formation of hexagonal-phased h-YPO₄·0.8H₂O with the crystalline relationship of [001]LYH//[0001]h-YPO₄·0.8H₂O, while the amorphous Y(OH)CO₃ favored the formation of tetragonal-phased t-YPO₄. We also systematically investigated the influence of Na₂CO₃/NaH₂PO₄ feeding ratio on the evolutions of morphology and size of the h-YPO₄·0.8H₂O sample, and we also obtained a novel mesoporous nanostructure for t-YPO₄ single crystalline with closed octahedron shape for the first time. Besides, the multicolor and phase-dependent luminescence properties of the as-obtained h-YPO₄·0.8H₂O and t-YPO₄ micro/nanocrystals were also investigated in detail. Our work may provide some new guidance in synthesis of nanocrystals with target phase structure by rational selection of precursor with topotactic structural matching.