Wenxiang Zhang

Effect of Au loading, H2O and CO concentration on the stability of Au/ZnO catalysts for room-temperature CO oxidation

Au/ZnO catalysts prepared by co-precipitation method with different Au:Zn atomic ratios have been studied for room-temperature CO oxidation in the presence/absence of water in the feed stream. The catalysts exhibited excellent catalytic activity and stability compared with pure ZnO. Furthermore, it was found that the lifetime of Au/ZnO catalysts was improved significantly by increasing CO concentration but decreased by addition of H2O in the feed stream. The deactivation may be related to the sintering of metallic gold and the accumulation of carbonate-like species in the catalyst.

Synthesis of mesoporous titanium phosphate with high surface area using long-chain alkylamine

A mesoporous titanium phosphate with high surface area was synthesized in an alcoholic system containing a small quantity of water using n-octodecylamine as structure-directing agent. The stability and structure order of the product treated by postsynthetic treatment can be improved remarkably after removal of the structure-directing agent by acidified ethanol extraction. The mesoporous product calcinated at 500 jC exhibits wormhole-like pore structure and high surface area about 497 m 2 /g.