Facile room temperature morphology-controlled synthesis of SrSO4 microcrystals

Abstract

A facile precipitation reaction without using any surfactants or templates has been employed to prepare SrSO₄ microcrystals from 0-dimensional (0-D) particles to 1-D rods and 3-D dendrites. Especially, flower-like SrSO₄ microcrystals with sizes of about 8 μm can be obtained under ambient conditions at room temperature. Detailed studies reveals that the formation of these 3-D structures is strongly dependent on the use of ethanol and the molar ratio of [Sr²⁺]/[SO₄²⁻] (R). At a prolonged aging time, the dendrites have evolved into mono-pods, double-pod, multi-pod and further into flower-like hierarchical architectures, driven by both the external crystal growth environments and intrinsic crystal structures.