Preparation and regulation of perovskite hydroxide nanomaterials

SHAO Jing, LONG Xinyi, FANG Yusheng, and YU Zhouyang College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518071, Guangdong Province, P. R. China Abstract: Mn-based perovskite hydroxide (MnSn(OH)6) has a cubic perovskite structure and shows promising application potential in lithium batteries, electrolytic hydrogen production and other fields. In order to avoid the destruction of the surface-activity and the nanostructure of typical Mn-based perovskite materials due to hightemperature treatment, a simple wet chemical method was used to obtain MnSn(OH)6 nanomaterials with pure crystalline phase and tunable morphology. The effects of the synthesis process parameters on the crystal structure, microscopic morphology and composition distribution of materials were systematically studied by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy and other characterization methods, and the electrochemical properties of the prepared MnSn(OH)6 nanomaterials were preliminarily explored. The results show that the synthesis temperature has a direct influence on the formation of MnSn(OH)6 perovskite crystal structure. By adjusting the synthesis temperature, the generation of SnO2 impurities can be eliminated. The amount of precursors determines the number of crystalline nuclei of MnSn(OH)6, and the particle size and morphology of the MnSn(OH)6 product can be regulated by regulating the amount of precursors. The dispersion method plays an important role in both the crystal structure development and morphology regulation of the product. The electrochemical properties of the product need further exploration and optimization. The results of the study may