Studies on the for Preparations of Titanium-Based mixed Oxide Materials via Pechini Method

Abstract

为了理解Pechini法制备钛基复氧化物材料过程的化学本质,本文选择柠檬酸钛、过氧柠檬酸钛和过氧乙二胺四乙酸钛三个体系,从合成化学的角度出发,合成、表征和热分析了系列钛的配位化合物,从而说明分子前驱体与钛基复氧化物物相之间的关系。现将主要结果总结如下:1.在所表征的柠檬酸钛配合物中,柠檬酸与钛离子的摩尔比为3:1,柠檬酸通过a-烷氧基和a-羧基与钛配位,形成的TiO6型结构不随pH值(2.0~7.5)和外界阳离子的变化而变化。不同电荷的柠檬酸钛阴离子可以通过调节溶液的的pH值相互转换;柠檬酸钛配合物的溶液核磁共振研究表明,pH越高,离解越显著。2.在合成的过氧柠檬酸钛配合物中,柠檬酸的b-羧基...In order to understand the chemical nature involving the species and structure information in the ‘Pechini Process’ for the preparations of titanium-based oxide materials, having chosen Ti(IV)-H4cit, Ti(IV)-H4cit-H2O2, and Ti(IV)-H4edta-H2O2 systems, we synthesized and spectroscopically and structurally characterized a series of complexes based on the synthetic chemistry. The results are summarize...学位:理学博士院系专业:化学化工学院化学系_物理化学(含化学物理)学号:B20022503

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