Biosynthesis and characterization or mesoporous organic-inorganic hybrid iron phosphate

摘要

Mesoporous organic-inorganic hybrid iron phosphate has been synthesized by a precipitation method with yeast cells as biotemplate. The yeast cells are used to regulate the nucleation and growth of iron phosphate. The small-angle X-ray diffraction (SXRD) patterns show a short-range ordered structure in the dried and calcined samples. The BJH (Barrett-Joyner-Halenda) models reveal that the average pore sizes are at 13.9 nm for dried sample and at 14.8 nm for calcined sample. The sample calcined at 300 ℃ has the highest specific surface area of 146.2 m~2g~(-1). Transmission electron microscopy (TEM) analyses reveal a wormhole-like mesoporous structure in the samples. Fourier transform infrared (FT-IR) spectra are used to analyze the chemical bond linkages in hybrid mesoporous FePO_4 materials. The FePO_4 coated carbon has higher conductivity than uneoated one, which has potential use for lithium battery materials.