Single Phase Mn3O4 Nanoparticles Obtained by Pulsed Laser Ablation in Liquid and Their Application in Rapid Removal of Trace Pentachlorophenol

We present a clean synthesis of well-crystallized pure Mn3O4 nanoparticles by pulsed laser ablation of an Mn metal plate immersed in deionized water at room temperature. The particle size, phase structure, and magnetic properties are characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectra, and superconducting quantum interference device. The colloids solution of Mn3O4 nanocrystals with narrow particles size distribution could be facile obtained in a single step without addition of any other chemical reagents. As-synthesized pure manganese oxide nanoparticles show good performance in significant and rapid removal of trace amounts of pentachlorophenol. Thoroughly distinct from the general chemical process for growing manganese oxide nanoparticles, here the formation of manganese oxide nanocrystalline is based on reactions between laser-generated manganese species and water molecules in a local high-temperature and high-pressure plume-liquid interface region.