基于含N生物聚合物修饰与稳定的金催化剂的制备与选择氧化反应性能研究

本课题选择以含氮天然生物聚合物藻红蛋白、壳聚糖及其衍生物、藻红蛋白-N(H)-多糖轭合物为稳定剂，利用多种分析手段研究这些生物分子与金纳米粒子及其它金属粒子的相互作用，通过有机-无机杂化技术及协同自组装技术制备生物聚合物/无机氧化物复合材料，利用聚合物分子中氨基等基团对金纳米粒子及其它金属粒子的稳定作用制备负载型纳米金及金基双金属催化剂，构筑由生物聚合物分子稳定的纳米金催化剂，以分子氧为氧化剂，考察金催化剂对温和条件下甲苯气相及液相选择氧化反应的催化性能，通过活性、选择性、稳定性与金物种结构的关联建立纳米金催化剂尺寸大小、表面结构与催化性能及稳定性之间的构效关系。这对丰富纳米金属粒子与生物分子的组装技术、制备新型的纳米生物材料、提高纳米金属粒子的稳定性、促进纳米金属催化剂的实际应用具有重要的学术意义。

Based on the interaction between gold nanoparticles and biopolymers such as phycoerythrin, chitosan and their conjugates, this project will fabricate biopolymer/inorganic oxide composite materials through organic-inorganic hybrid method and self-assembly method. Gold and gold-based bimetallic catalysts supported on these composite materials will be prepared through the stabilization of amino-groups from biopolymer on gold and other metal nanoparticles. The structure of these composite materials and gold catalysts will be investigated by various modern characterization techniques. The activities, product selectivities and stabilities of supported gold catalysts will be also achieved for gas and liquid selective oxidation reaction of toluene using molecular oxygen as oxidant under mild conditions. The relation between gold nanoparticles size and active gold species structure will be connected with their catalytic performances. This project will has an important effect for preparing novel gold catalysts protected by biopolymers, improving their stabilities, and promoting their industrial applications.