利用废弃稀土荧光粉直接制备稀土掺杂高取向{001}晶面氧化钛纳米片阵列薄膜及其光催化研究

项目名称： 利用废弃稀土荧光粉直接制备稀土掺杂高取向{001}晶面氧化钛纳米片阵列薄膜及其光催化研究

项目编号： No.21306004

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 吴玉锋

作者单位： 北京工业大学

项目金额： 25万元

中文摘要： 稀土是重要战略资源，在我国稀土矿产过度开采、乱采乱挖和实施出口管控的背景下，开发稀土二次资源再生和高值利用技术成为国内外的研究热点。稀土掺杂TiO2纳米材料在环境和能源领域具有广阔的应用前景，但其传统制备应用中还存在成本偏高、纳米粒子易团聚、光催化活性偏低等问题。针对上述问题，本项目提出直接利用废弃稀土荧光粉为稀土掺杂源，优选非金属离子调变剂，通过溶胶凝胶和溶剂热两步法，低成本可控制备具有优异光催化和抗菌性能的稀土掺杂高取向{001}晶面TiO2 纳米片阵列薄膜的研究思路，并深入研究稀土离子和非金属离子对 TiO2 纳米片的结构形态、晶面暴露、光谱响应范围、光催化及抗菌性能的影响规律，揭示废弃稀土荧光粉的掺杂机理和高取向性{001}晶面TiO2 纳米片的形成机制。本项目将建立一种低成本、简单高效的TiO2 纳米片的可控制备方法，揭示其材料成分、组织结构、光催化及抗菌性能之间的关系。

中文关键词： 废弃稀土荧光粉；制备；二氧化钛；纳米片；光催化

英文摘要： Rare earth is an important strategic resource. Due to the over-exploitation, Illegal exploitation and export control of rare earth minerals in China, the technologies on recycling and high value-added utilization of rare earth secondary resource have become a research focus at home and abroad. The Rare-Earth (RE)-doped TiO2 is an important semiconductor material that can be potentially applied in environment and energy field. However, there are some drawbacks in its traditional preparation and practical application such as high-cost, easy aggregation of nanoparticles and low photocatalytic activity. In this project, we will prepare controllably high exposed {001} facets RE-doped TiO2 nanosheets film with high photocatalytic activity and outstanding antimicrobial property via the sol-gel and mild solvothermal method in order to overcome the drawbacks of RE-doped TiO2 nanoparticles mentioned above. The waste rare earth fluorescent powders and suitable non-metallic ions were used as a dopant RE sources and dopant non-metallic ions sources, respectively. The relationship between the RE, non-metal ions co-doped and TiO2 nanosheets morphology crystal face exposure, spectral response range, photocatalytic and antibacterial properties will be investigated. The doping mechanism of waste rare earth fluoresent powders and

英文关键词： Waste rare earth phosphors；Preparation；Titanium dioxide；Nanosheets film；Photocatalysis