Abstract
Plate-like semiconductor particles possessing bandgap energy of ca. 3 eV have attracted attention because of their UV-shielding ability and excellent comfort when applied on the skin. Hydrated cerium phosphate, Ce2(PO4)2HPO4·H2O, possessing two dimensional layer structure tends to grow as plate-like microparticles under solvothermal reaction conditions, and are easily converted to other cerium phosphates such as CeP2O7 and CePO4 with retaining plate-like morphology by the calcinations under mild conditions less than 700 °C. These plate-like cerium phosphates may be candidate materials for cosmetic grade UV-shielding application because of the unique UV-shielding ability, low catalytic activity and excellent comfort.
