Study On Preparation Of Au Catalysts Supported On CNTs And Pillaring Bentonite And Their Catalytic Performance

In recent years, gold catalyst caught researchers’large interests as a new kind of catalytic material, while maintaining particle size of gold catalysts in a few nanomet-ers is fundamental to guarantee its high catalytic activity. In order to maintain the nano-structure of the catalytic component,Au nanoparticles are introduced in t-he interlaminar space of the bentonite and formed strongly bound to its unique one-dimensional layered structure. Using the Au-Al-Ce pillaring species put th-e Au nanoparticles into the interlayer space of modified bentonite, compared with Au nanoparticles catalysts supported on Al/Ce pillared bentonite, so as to get a new kind of supported gold catalysts. These catalytic evaluation in the CO oxidation reaction were carried out and investigated the supports and catal-ysts were characterized by BET、ICP、IR、TPD、TGA-DS、XRD and TEM. It was pointed that compared with the traditional supported gold catalysts, the gold catalysts using the Au-Al-Ce pillaring species has higher surface areas an-d part of the Au nanoparticles put into the interlayer space of modified benton-ite. Results indicate the clay modified with Au-Al-Ce is a very active catalyst in the CO oxidation reaction. Meanwhile, a bentonite via pillaring by Au-Al-Ce, can succeed in confinement gold particles, thus Au nanoparticles catalysis has better stability. CNTs is a kind of one-dimensional material with a hollow struct-ure, and its diameter is generally between1nm to several tens of nm. Due to the con-finement effect of CNTs, substances filled in CNTs get new structures and propertie-s. This paper concludes the common methods of modifying CNTs, and trying to fill C-NTs with gold nanoparticles.