title: Preparation and bactericidal property of MgO nanoparticles on gamma-Al2O3.
abstract: After being impregnated in the solution containing Mg(NO3)2 x 6H2O, gamma-Al2O3 was dried and calcined at 500 degrees C which results in the production of a bactericide, highly dispersed MgO loaded on the surface of gamma-Al2O3. The threshold value of the monolayer dispersion of MgO on gamma-Al2O3 is 14.97%, and MgO crystal formed when the load amount beyond this value. The samples with different load amount were characterized by X-ray Diffraction (XRD), Low-temperature N2 adsorption-desorption, Inductively Coupled Plasma (ICP) and High Resolution Scan Electronic Microscope (SEM). The results showed that these MgO microcrystals are highly dispersed and have regular size in the range of 4 to 10.8 nm. The specific surface, pore volume and pore size of the sample decreases with the increase of load amount. It is demonstrated that gamma-Al2O3 with highly dispersed MgO on the surface is efficient bactericide, and the one with 20% load amount of MgO can kill more than 99% bacteria and spore cells.
authors.affiliation: Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China.
authors.forename: Yan-Jun
authors.initials: YJ
authors.lastname: Lin
authors.forename: Dian-Qing
authors.initials: DQ
authors.lastname: Li
authors.forename: Ge
authors.initials: G
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Huang
authors.forename: Xue
authors.initials: X
authors.lastname: Duan
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000032:analysis / Q000737:chemistry* / Q000494:pharmacology*; D001412:Bacillus subtilis / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D020099:Coated Materials, Biocompatible / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology; D008277:Magnesium Oxide / Q000737:chemistry* / Q000494:pharmacology*; D008422:Materials Testing; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D016062:Porosity; D013211:Staphylococcus aureus / Q000187:drug effects; D013499:Surface Properties
chemical_list: D000900:Anti-Bacterial Agents; D020099:Coated Materials, Biocompatible; D008277:Magnesium Oxide; D000537:Aluminum Oxide