In Liquid Phase Method To Control The Synthesis Of Nano-iron Oxide, Iron Hydroxide

It is always a hot field in controlling inorganic nanomaterials structure, size and morphology to the development of nanoscience and nanotechnology. In addition, this study will become the precondition of preparing complex ultra-structure instruments. Due to so many advantages of the liquid-phase syntheses, it will be one of the important methods to assemble the basal nanoparticles in the future. Up to now, it is still an important task in the field of material that how to develop new methods for preparing nanomaterials. Although there are many liquid-phase methods reported for preparing materials, it is still difficult to obtain materials with controllable morphologies and sizes. Therefore, it is attracting a great deal of attention of the chemists and materials researchers to explore new liquid-phase methods for obtaining low-cost mild reaction.Our group has rich experience in the technology of solvent extraction, separation and the preparation of inorganic nanoparticles in liquid-phase system. On the base of our group's works in the past, the point of this dissertation is to find new liquid systems that can be applied to prepare nanomaterials. This study both enriches the liquid-phase methods of nanomaterials, and also provides a new thought for preparing complex materials with special nano-structures. On the base of preparation iron oxides nanoparticles in the liquid-phase chemical methods, several liquid synthetical systems including pure aqueous system, polymer/water system, polymer/alcohol/water system, alcohol/water homogeneous system and alcohol/water heterogeneous system have been studied detailedly in this dissertation. The detailed information of the dissertation is listed as follows.1, Preparation of nano iron oxides in simple aqueous system: 1) The effects of various inorganic acid radical (Cl^-, NO₃^- and SO₄^2-) to the morphologies of hematite in the aqueous system have been studied. Furthermore, the changing morphologies of hematite gained experiments have been done by controlling different transfer state of Fe(III) that was achieved by using different kinds of inorganic acid. It has been found that not all of the inorganic acid can change the primary morphologies...