Supported Ru/HMS zeolite was prepared via the impregnation method.Characterization results showed that HMS was partially covered by ruthenium on its surface,and the degree of irregularity on the catalyst surface was i...Supported Ru/HMS zeolite was prepared via the impregnation method.Characterization results showed that HMS was partially covered by ruthenium on its surface,and the degree of irregularity on the catalyst surface was increased.Thus,specific surface area and pore volume of this catalyst were also increased.The Ru/HMS catalyst exhibited efficient catalytic performance towards liquid-phase oxidation of allylic and benzylic alcohols under mild conditions in the presence of molecular oxygen.展开更多
The nanocarbonaceous material with helical structure is considered to be promising as nanocoils. Both left and right handed helical structures normally coexist and are disordered. So far, there has been no report abou...The nanocarbonaceous material with helical structure is considered to be promising as nanocoils. Both left and right handed helical structures normally coexist and are disordered. So far, there has been no report about double or multi directional helical structures on an individual nanomaterial. In this paper, Multi directional helical structures were observed in an individual carbon nanofiber during the pyrolysis of acetylene at a mixture of C2H2∶ H2=2∶ 1. It is possible to control and prepare multi directional helical nanomaterial, and it can be used into new application area.展开更多
文摘Supported Ru/HMS zeolite was prepared via the impregnation method.Characterization results showed that HMS was partially covered by ruthenium on its surface,and the degree of irregularity on the catalyst surface was increased.Thus,specific surface area and pore volume of this catalyst were also increased.The Ru/HMS catalyst exhibited efficient catalytic performance towards liquid-phase oxidation of allylic and benzylic alcohols under mild conditions in the presence of molecular oxygen.
文摘The nanocarbonaceous material with helical structure is considered to be promising as nanocoils. Both left and right handed helical structures normally coexist and are disordered. So far, there has been no report about double or multi directional helical structures on an individual nanomaterial. In this paper, Multi directional helical structures were observed in an individual carbon nanofiber during the pyrolysis of acetylene at a mixture of C2H2∶ H2=2∶ 1. It is possible to control and prepare multi directional helical nanomaterial, and it can be used into new application area.
