分级纳米结构的铁硫族元素化合物合成及表征-地球化学专业论文.docxVIP

摘要 摘要 Abstract Abstract PAGE PAGE IV 微球。 (3) 梅剂热法合成花状 FeSe2 纳米结构 在该部分工作中我们以 Se 粉、 NaOH 和 FeCh.4H20 为反应物，乙二醉为榕 剂，通过一种简单的恪剂热法一步合成花状纳米结构 FeSe2 从而为 FeSe2 的合 成提供了…种新方法。对合成产物我们用 XRD 和 SEM 进行了表征，并探讨了 温度和 NaOH 的加入量对反应的影响，发现反应温度和 NaOH 的量对产物的物 相有很大影响。 关键词: 铁的硫族元素化合物微波合成多元醉过程纳米结构单分散微球 ABSTRACγ As an important class of inorganic functional materials，Iron selenides and sulfides have unique optical，electronic，magnetic and transport properties. However， reports on synthesis ofiron selenides and sulfides such as FeSe，FeSz and FeSezare ve可 rare in comparison with that for other metal chalcogenides. In additional ，synthesis of three-dirnensional hierarchically nanostructured materials has become a hot spot in the field of research on nanomaterials. These materials with complex structures usually exhibit special properties correlated with th忧 structures and morphologies. The most promising and now extensively used method for achieving novel structures is the selfassembly process. Although the major advances have been made in (building the novel structures，fully understanding and exploiting the self-assembly process to develop facile and simple methods to synthesize various novel structures are still higl让y desired. In this thesis，hierarchically nanostructured FeSe，FeS2 and FeS的 withdefmed mo叩hologies were selectively produced employing polyol as the solvent.Moreover，we have investigated the morphology，struc阳re，and formation process of the products. Several important results were summarized as follows: (l)Microwave-assisted synthesis of flow町-like βFeSe microstructures Flower like tetragonal iron selenide (?-FeSe) microstructures assembled by nanoplates have been successfully prepared using Se powder，FeCh.6H20 and NaOH as reactant in 1，2-propylene glycol (1，2-PG) solvent system by microwavc irradiation for lh.ηle product was charactcrized by means of X-ray diffraction spectroscopy 0低D)， scanning electron microscopy (SEM)， transmission electron micros