Yu Xing

Self-assembly synthesis of Mn3O4 hierarchical micro/nano architectures as supercapacitor electrodes

There is an intense need for development in the field of hierarchically structured functional materials due to their outstanding and peculiar properties. Herein, three types of hexagonal Mn3O4 micro/nano hierarchical architectures were successfully prepared based on a self-assembly approach via a hydrothermal synthesis route at low temperature, which is sparse in the literature. These three types of hexagonal Mn3O4 micro/nano hierarchical architectures were constructed from different building block nanostructures. The formation mechanisms are discussed, and the electrochemical performances are investigated. Electrochemical studies show that Mn3O4 hierarchical architectures exhibit good specific capacitance and electrochemical stability, making them promising electrode materials for electrochemical capacitors.

Robust Macroscopic 3D Sponges of Manganese Oxide Molecular Sieves

The construction of macroscopic 3D sponges is of great technological importance for various applications. An outstanding challenge is the facile fabrication of sponges with the desirable combination of good stability, high electrical conductivity, and absorption ability. Here free-standing 3D OMS-2 sponges are demonstrated, with various densities, which possess a combination of desirable physical properties including high porosity, robustness, permeability, recyclability, high electrical conductivity, and selective water absorption in preference to oil. Some of these properties have systematic trends with various densities. The stress of the OMS-2 sponge, made by nanowire-based freeze-drying process, is four orders of magnitude higher than that made by calcination-related process. These new materials should find practical applications in environmental, catalysis, sensing, absorption, and energy storage, particularly in the removal of water spill cleanup, and beyond.