功能化核壳结构磁性微粒表面共价嫁接多酸高效易分离回收催化剂的制备及催化性能研究

Polyoxometalates (POMs) exhibit compositional diversity and structural versatility combined with numerous advantageous properties, such as reversible oxidation, leading to applications in many fields, especially in the field of catalytic applications. However, most of POMs are soluble and some are unstable in polar solvent, which leads to be difficult to be separated and reused as catalysts. This topic is proposed to design and prepare a series of easily seperated and recycled catalysts based on functionalized core-shell magnetic nanoparticles covalently bonded with active polyoxometalates. Furthermore, by in situ electrochemical reduction method, depositing later transition metal onto the surface of part of the aforementioned prepared catalysts to obtain composite magnetic photocatalysts. Study the relationship among the composition, structure and morphology for the catalytic activity and selectivity, and catalytic mechanism. Use environmentally friendly oxidant and effective utilization of natural light, some transformation of important organic functional and the degradation of organic pollutants in water will be studied. Strive for the realization of POMs just from the functional molecules to the functional materials which is long-standing challenging subject in POMs chemistry.

多金属氧酸盐(POMs, 简称多酸)由于其结构和组成的多样性及可逆的氧化还原性，使其在多个领域具有重要的应用，尤其在催化领域备受关注。然而多数POMs易溶于极性溶剂，作为催化剂使用存在着稳定性差及难以回收和重复利用的难题。本课题拟设计合成系列具有优良催化活性的多金属氧簇合物，通过共价键合等方式将其牢固嫁接在功能化的核壳结构的磁性微粒的表面得到高效易分离回收的氧化还原催化剂；通过原位电化学还原法，沉积后过渡金属单质颗粒于已制得的多酸键合的核壳结构的磁性微粒的表面，制得多元复合的核壳结构的磁性微粒光催化剂。研究其组成、结构及形貌与催化活性及选择性的关系和催化机理。采用绿色环保型氧化剂或自然光，对有机化学中的一些重要官能团的转化及水中有机污染物的降解进行研究。力求在实现POMs从功能分子到功能材料的转化这一长期存在的挑战课题上取得重要进展。

多金属氧酸盐(POMs, 简称多酸)由于其结构和组成的多样性及可逆的氧化还原性，使其在多个领域具有重要的应用，尤其在催化领域备受关注。然而多数POMs易溶于极性溶剂，作为催化剂使用存在着稳定性差及难以回收和重复利用的难题。本课题拟设计合成系列具有优良催化活性的多金属氧簇合物，通过共价键合等方式将其牢固嫁接在功能化的核壳结构的磁性微粒的表面得到高效易分离回收的氧化还原催化剂；通过原位电化学还原法，沉积后过渡金属单质颗粒于已制得的多酸键合的核壳结构的磁性微粒的表面，制得多元复合的核壳结构的磁性微粒光催化剂。研究其组成、结构及形貌与催化活性及选择性的关系和催化机理。采用绿色环保型氧化剂或自然光，对有机化学中的一些重要官能团的转化及水中有机污染物的降解进行研究。力求在实现POMs从功能分子到功能材料的转化这一长期存在的挑战课题上取得重要进展。