离子液体室温电解制备金属钛的基础研究

项目名称： 离子液体室温电解制备金属钛的基础研究

项目编号： No.50864009

项目类型： 地区科学基金项目

立项/批准年度： 2009

项目学科： 环境科学、安全科学

项目作者： 徐存英

作者单位： 昆明理工大学

项目金额： 27万元

中文摘要： 发展低成本生产金属钛的新理论与新工艺是目前钛冶金研究的热点课题。本项目以开发在室温下用离子液体直接电解二氧化钛制备金属钛为研究对象，研究离子液体中直接电解二氧化钛制备金属钛的电化学基础理论。具体内容包括：筛选制备适合电解还原二氧化钛制取金属钛的离子液体，研究二氧钛的电解速率、电流效率与电解液的组成、槽电压、电流密度以及二氧化钛电极电导率等参数的关系；通过电化学测试和红外、核磁、质谱等光谱技术对电解过程中离子液体电解液的测试，配合量子化学中的密度泛函理论方计算，分析放电离子的存在形态和电极反应过程，结合电化学还原参数对还原反应的影响，研究在离子液体中电化学还原二氧化钛的电化学机理。本项目旨在揭示离子液体室温电解金属钛的本质，为发展节能、减耗、环保的钛冶金新技术奠定理论和实践基础。

中文关键词： 离子液体；室温；电解；二氧化钛；钛

英文摘要： The developing new technology and theory for low-cost production of titanium is the hot topic in titanium metallurgical research field. The objective of proposed research is to exploit techniques of the direct electrochemical reduction of titanium dioxide to titanium in ionic liquid at room temperatures, and study the electrochemical theory. The specific contents as follow: The ionic liquids were chosen and synthesized for a particular functionality which suit for the direct electrochemical reduction of titanium dioxide to titanium. The influences of electrolyte composition, cell voltage, current density and titanium dioxide electrode conductivity on the electrolysis rate and the current efficiency will be studied. the existing form of discharge ion and electrode reaction will be researched through the analytical results that natures of ionic liquid electrolyte are investigated by means of electrochemical measurements and spectroscopic studies such as infrared spectrum, nuclear magnetic resonance and mass Spectrometry during the process of electrolysis, and combine with results of density functional theory(DFT) calculations. The electrochemical of electrochemical reduction of titanium dioxide to titanium metal in ionic liquid will be revealed, which is based on the existing forms of discharge ions and mechanism of electrode reaction, and the effects of electrochemical reduction parameters on the reaction rate and efficiency of electrochemical reduction. The project aims at revealing nature of electrolysis titanium metal in ionic liquid at room temperature, and providing new theoretical and practical foundation for development of new titanium metallurgical process with energy conservation, decreasing consumption, environment-friendly.

英文关键词： ionic liquid; room temperature; electrolysis; titania; titanium