Room Temperature Solid-phase Synthesis Of Ultrafine Metal Oxide

The thesis applied the solid-state synthesis method at room temperature, set up the method system and the preparation mechanism about how to prepare the superfine medal oxidation and studied the application of superfine and complex medal oxidations in the refrigerator's eliminating niff catalyst, it content includes:1) In the solid-state at room temperature reactive system of hydration acetic salt of medal Cobalt, Manganese, Copper, Nickel and oxalic acid ,the solid-state preparing method of them is studied.2) By the component composition analysis of superfine metal oxidation using the method of complexometric titration, the best reactive condition was found preliminarily and the compact extent of each factor to production.3) Researching the synthetical mechanism of solid-state reaction and the affection raw of synthetical reaction especially the high temperature reaction.4) Characterizing the precursors' composition, heating property and the shaping and sizes of superfine metal oxidations, deciding the best reactive condition.5) studying the effect of the single and complex superfine medal oxidation to catalyze ethanethiol and formaldehyde in the refrigerator simulation testing box and compare, then selecting the best ratio of metal oxidations.Seeing from the experiment, the new method of solid-state at room temperature is simple and environmental .Its yield is high, its selection is strong, the cost of synthesis is low, no need of solvent and it can avoid the reunite problem compared to adopting the solution method. It can easily be industrialized.The main effect factors include the ratio of reactant, the rubbing time, the decomposing temperature and time et al. Of them, decomposing temperature is the biggest effect factor and the next is heating time. Only strictly controlling the temperature can it be prepared what needed especially for the Cobalt, Manganese precursors because of many chemical valence.The productions are cubic Co2O3, heagonal crystal system MnO2, monoclinicsystem CuO $1 NiO,the particles' distribution is even and size is about 30~70nm.From the study for the oxidations prepared, it is obtained that the MnC^ CuO oxidations which added a small quantity of 0203 and some activated carbon have the property of eliminating the niff ,the elimination ratio can reach to above 98.5% for ethanethiol, 70% for formaldehyde and have the advanced advantage compared to other kinds of catalyst.