Preparation Of Micro/Nano Materials Of Organometallic Compounds And Inorganic Salts By New Methods And Their Properties

The objectives of this thesis are in preparing micro/nano materials of organometallic compounds and inorganic salt by new way and researching their properties, with a strong focus on preparation of micro/nano materials of organometallic compounds by ultrasonic-solvent -substitution method, preparation of micro/nano fibers of organometallic compounds by electrospinning technique, preparation of micro/nano materials by the template of the squama inner coat of onion ar the room temperature. The main results are as follows:1. Ultrasonic-solvent-substitution method was developed to prepare micro/nano materials of organometallic compounds. Ferrocene nanocrystals with the average diameters 40±5 nm were successfully prepared by the method. X-ray diffraction analysis of the products indicated that the products are purity. UV-Vis spectrum showed that, compared with ferrocene bulk material, the nanospheres showed obvious blue shift. Cyclic voltammetry was used to test the electrochemical properties of the ferrocene nanosphere, which modified glassy carbon electrode toward ascorbic acid. The results showed that the ferrocene-nanosphere-modified GC electrode exhibited better electrocatalytic effect than that modified by the ferrocene bulk material. Micro/nano materials of titanocene-dichloride were also prepared by ultrasonic-solvent- substitution method. X-ray diffraction analysis of the products indicated that the products are purity. Micro/nano materials of cisplatin were also prepared by the method.2. We developed the way to prepare organometallic-compounds-loaded poly (L-lactic acid ) micro/nano fibers by electrospinning technique.Titanocene-dichloride-loaded poly ( L-lactic acid ) micro/nano fibers were developed. The resultant nanofibers were subsequently characterized by scanning electron microscope, transmission electron microscopy. Furthermore, the structural and thermal properties of the electrospun fabrics were examined by XRD and TG. Results show that better sustained release properties of titanocene dichloride were achieved. Titanocene dichloride released from titanocene-dichloride-loaded poly ( L-lactic acid ) micro/nano fibers still have obvious antitumor activity. Titanocene-dichloride- encapsulated micro/nano fibers with core-shell structure were successfully fabricated by coaxial electrospinning technique. Poly(L-lactic acid) were selected as shell materials and titanocene-dichloride was selected as core materials. The results proved it. Cisplatin-loaded poly( L-lactic acid ) micro/nano fibers were developed by electrospinning technique. The resultant nanofibers were subsequently characterized by scanning electron microscope, transmission electron microscopy. Release properties of cisplatin were also researched. Results show that better sustained release properties of cisplatin can be achieved. Cisplatin released from Cisplatin-loaded poly ( L-lactic acid ) micro/nano fibers still have obvious antitumor activity.3. A new method of synthesizing nanomaterials by bio-template of the squama inner coat of onion was developed. The method is able to make monodisperse silver nanoparticles, semiconductor MS (M= Ag, Cd and Pb) nanoparticles, Ni(OH)₂ microsphere, SrCrO₄ nanomaterials and CaCO₃ nanoparticles. Monodisperse silver nanoparticles with diameters in the range of 3-15 nm with narrow size distribution were synthesized. CdS hollow nanoparticles with diameters in the range 85-100nm, Ag₂S nanoparticles with diameters in the range of 35-50nm, PbS nanoparticles with diameters in the range of 7-10nm. UV-visible absorption spectra of the nanoparticles have shown obvious blue shift due to quantum confinement. By this way, we synthesize the Ni(0H)2 microsphere, which were assemblied by many nanobelts with the thichness in the range 30-50nm. The method is able to make SrCrO₄ nanoparticles with average diameters in the range of 90-170 nm, SrCrO₄ nanorods with lengthen in the range 0.70-2 um, width in the range of 80-180 nm, and SrCrO₄ dumbbell-shaped superstructure with lengthen in the range 10-14 um. The dumbbell-shaped superstructures are assembly by many SrCrO₄ nanowires with lengthen in the range 10-14 um, width in the range of 30-50 nm.CaCO₃ nanoparticles with average diameters in the range of 40-80nm were also synthesized by the method. Because the method is simple, effective, mild and green, it will have potential application in synthesizing the other nanomaterials.