Controllable Synthesis, Characterization And Properties Of Transition-metal Sulfides With Hollow Interior

Various nano/micrometer transition metal sulfides material with interior hollow have become the focus in recent years due to its novel optical, electric and magnetic properties and the important potential application in photocatalysis, lithium battery, biomedical and sensor. Studies show that the properties of material depend not only the chemical composition, but also on the size and shape. Thus it is of great importance to control the morphology, size, dimensionality and structure of nanomaterials, and clearly understand the relationship between structure and properties of nanomaterials. In this thesis, a hydrothermal route was developed to synthesize several transition metal sulfide micromaterials with interior hollow. We exploited the influence of reaction parameters on size, morphology, composition and structure. The main summarized as follows:(1) We have successfully developed a hydrothermal route to synthesize dandelion-like MnS hollow microspheres with uniform size and morphology. The morphologies could be controlled by adjusting the reaction parameters such as reaction duration, temperature, surfactants. The possible mechanism of dandelion-like MnS hollow microspheres has been exploited. The influences of different surfactants (PVP, CTAB, PEG) on size and morphology of MnS have been probed. The dependence of PL properties on morphologies, size and reaction duration of final products has been clearly observed.(2) Based on above work, MnS hollow microspheres have been successful synthesized. The morphologies of as-prepared products have been controlled by using different surfactants (CTAB, PVP). The possible mechanism of MnS hollow microspheres has been proposed.the PL properties and mechanics of final products have been examined.(3) High purity NiS2hollow microspheres were successful synthesized via hydrothermal route, reaction parameters have a great influences on microscopic structure of as-prepared products. The possible mechanism of NiS2hollow microspheres has been proposed. We have exploited the phase transformation of NiS2. NiS and NiO hollow microspheres were synthesized by annealing in air condition at different temperature.This work enriched and developed the technology of the preparation of metal sulfide and metal oxide hollow micromaterials, besides it also provides the theory supports of synthesis of micro/nanomaterilas with interior hollow.