Size- and morphology-controlled biomimetic synthesis of hierarchical hollow BaCO3

Abstract

Here, hierarchical hollow barium carbonate (BaCO 3 ) with different sizes and morphologies can be obtained by a simple one-pot approach in the presence of soluble starch. Instead of dendritic crystals obtained without soluble starch, the morphology with hierarchical hollow BaCO 3 superstructure can be systematically changed from shuttle-like to cauliflower-like with the reaction time. In addition, the highly effective additive also acts as a crystal size-controlled modifier over a range of concentrations. Detailed analysis of the crystal substructures with field-emission scanning electron microscope (FESEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) disclose that the hierarchical hollow shuttle-like BaCO 3 superstructures are firstly synthesized by self-assembly and Ostwald ripening process. Then, the fractal splitting mechanism is adopted to introduce the synthesis of the hierarchical hollow BaCO 3 crystals with different morphologies at the different reaction time. Our present work not only provides a method to fabricate the different morphologies and sizes of BaCO 3 particles with hollow superstructures, which can be used in many industrial applications, but also sheds light on the Ostwald ripening and the fractal splitting mechanism of biomimetic mineralization induced by organic additives.

Microemulsion-based interfacial diffusion synthesis of uniform BaCO3 nanorods

“…4a) produced via method A in the absence of surfactant. The SAED diffraction spots were observed due to the [100] zone axis of the witherite phase (JCPDS 05-0378), which is quite frequently reported in the literature [2][3][4][5]. High-resolution TEM image in Fig.…”

“…Submicron-sized and nanosized powders and structures with specific shape normally show interesting properties and considerable potential applications. Thus, size-and shape-controlled synthesis of BaCO 3 has become the focus of research attention [2]. To manipulate nucleation and growth of the solid product formation process, which is critical for size and shape control of BaCO 3 , a great many techniques have been investigated during the past decade.…”

Non-isodiametric growth and confinement effect in the mineralisation of witherite

“…Yu and colleagues (Yu et al , 2005) prepared barium carbonate with a spiral configuration using a racemic block copolymer to induce crystal growth. Ma and colleagues obtained hollow barium carbonate graded by size in the presence of soluble starch (Ma et al , 2012). Lv and colleagues synthesised different shapes of barium carbonate ranging in size from 130–380 nm that were induced by PVP (polyvinylpyrrolidone) and citric acid (Lv et al , 2008).…”

Facile one-pot synthesis and photocatalytic properties of hierarchically structural BiVO4with different morphologies

“…Soluble starch, similar to polysaccharides, has a strong affinity to many kinds of inorganic molecules binding to different sites, which allows its possible utilization in mediating the formation of inorganic materials. 32 However, there has been little research on the hydrothermal synthesis of BiVO 4 crystals of various shapes under the mediation of soluble starch.…”