Synthesis of MnO₂ Nanostructures with Sea Urchin Shapes by a Sodium Dodecyl Sulfate-Assisted Hydrothermal Process

Abstract

MnO2 nanostructures with sea urchin shapes have been prepared by an sodium dodecyl sulfate (SDS)-assisted hydrothermal treatment method. The products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). XRD patterns indicated that the sea urchin shaped MnO2 nanostructures were tetragonal phase. Furthermore, SEM and TEM revealed that MnO2 nanostructures with sea urchin shapes consisted of MnO2 nanorods 150−200 nm wide and several micrometers long. A growth mechanism of MnO2 nanostructures with sea urchin shapes was suggested and explained in detail.

Facile synthesis and electrochemical characterization of hierarchical α-MnO2 spheres

“…1c). As the reaction temperatures further increased to 70 • C, ␣-MnO 2 microspheres having a sea-urchin shape [25][26][27][28] would be obtained ( Fig. 5a and b).…”

“…Recently, it is highly desirable to assemble metal oxides nanoparticles into three-dimensional (3D) spherical nanostructures, which are expected to bring novel properties. For instance, hierarchical TiO 2 spheres with improved photocatalytic performance and Li storage capacity have been reported [20][21][22] also been synthesized via a catalytic or hydrothermal route [23][24][25][26][27][28][29][30][31].…”

Enhanced catalytic and supercapacitor activities of DNA encapsulated β-MnO2nanomaterials

“…Thus, considering all these properties of DNA, which are derived from its base pairs and the abundant functional phosphate group on its hydrophilic phosphate-sugar backbone, further explorations of using DNA in the synthesis and assembly of advanced nanostructures is extremely desired and expected. Different types of wet-chemical routes have been employed for the formation of MnO 2 nanomaterials including hydrothermal, 24 microemulsion, 25 sol-gel, 26 co-precipitation 27 and microwave heating 28 routes. Zheng et al synthesized sea urchinlike MnO 2 nanomaterials using a hydrothermal process.…”

“…Zheng et al synthesized sea urchinlike MnO 2 nanomaterials using a hydrothermal process. 24 Pal et al synthesized spherical and rod-shaped MnO 2 nanomaterials using wet-chemical techniques. 29 There are several other reports where MnO 2 was combined with other materials such as CNT and polymers and used in energy-related applications.…”

Hydrothermal synthesis of selenium and tellurium nanorods

“…The fabrication of one-dimensional (1D) nanostructure materials has attracted considerable attention because of their unique electronic and mechanical properties and potential implementation as devices [1][2][3]. Several techniques for the preparation of 1D nanomaterials have been reported, such as the vapour-liquid-solid growth [4], laser ablation [5], solid-liquid phase arc discharge method [6], electrochemical techniques [7], templating [8] and hydrothermal method [9].…”