Sodium Tungstate and Sodium Molybdate Hollow Microspheres

This study is to present sodium tungstate and sodium molybdate hollow microspheres-microspheres with three length-to-diameter ratios of 1:1, 3:1, and 10:1. They were excreted by two strains of aquaculture probiotic Gram-negative bacterium, Shewanella sp. and Pandoraea sp. Their morphology is of hollow spherical shape, which was captured via the scanning electron microscope (SEM); and their crystal structures are Na2MoO4 and Na2WO4 with Na2W2O7 respectively, which were verified by the X-ray diffraction (XRD). The hollow spherical structure can withstand a uniaxial compressive pressure of 10MPa.