I. Preparation of Au/TS-1 Catalysts by Ionic Liquid Enhanced Immobilization Method II. Gold Recovery from Aqueous Solution and Preparation of Au nanoflowers Based on Synergistic Action of Microorganism and Surfactant

Abstract

1.考察了将离子液体分别引入沉积-沉淀法和生物还原法制备负载型金催化剂（Au/TS-1）的过程，并将所获催化剂用于H2、O2共存时的丙烯气相环氧化过程。沉积-沉淀法引入离子液体后，制备过程中离子液体的用量、体系的pH以及Au负载量均会影响所获催化剂的催化性能。离子液体的引入可以提高Au的有效负载量，并在一定程度上提高催化剂的催化性能，但Au负载量的提高是有限的，而且Au的有效利用率偏低。将离子液体引入生物还原法后，考察了制备过程中离子液体的种类、生物质的种类和生物质浓度的影响，发现所选取的几种含有咪唑类阳离子基团的离子液体引入均有助于高效的将Au负载在TS-1载体上，且Au的有效利用率接近10...1. Ionic liquid (IL) was introduced to the preparation process of Au/TS-1 catalysts with Deposition-Precipitation (DP) method and Bioreduction (BR) Method. And the obtained catalysts were used for the direct vapor-phase epoxidation of propylene in the presence of hydrogen and oxygen. For the Au/TS-1 catalysts preopared by DP method with IL (i.e. DP-IL method),the catalytic performance was affected...学位：博士后院系专业：环境与生态学院_环境工程学号：201217001