Hierarchial silica oxidation dehydrogenation catalyst

Abstract

A nanotherapeutic supported by a hierarchical silica composite with dual imaging capability (e.g. fluorescence and magnetic resonance imaging), a method of preparing the nanotherapeutic, and a method of treating cancer. Also disclosed is a method of oxidatively dehydrogenating ethane using a catalytic system supported by a hierarchical silica composite.

1 . (canceled) 
     
     
         2 . The catalyst of  claim 20 , wherein the hierarchical silica composite has a silicon to aluminum molar ratio in a range of 1,000:1 to 3,000:1. 
     
     
         3 . The catalyst of  claim 20 , wherein the mesopores have a pore volume in the range of 0.5-1.5 cm 3 /g and a surface area in the range of 800-1,600 m 2 /g. 
     
     
         4 - 19 . (canceled) 
     
     
         20 . An oxidative dehydrogenation catalyst, comprising:
 a hierarchical silica composite comprising
 a stereoregular MCM-41 ordered arrangement of uniformly-sized mesopores with diameters in a range of 2-50 nm and mesopore walls having a thickness of about 1 to about 5 nm, 
 a stereoregular monodispersed spherical silica with a particle size of about 80 nm with a pore diameter of 10-20 nm, and 
 a stereoregular MFI silicalite ordered arrangement of uniformly-sized micropores with diameters of less than 2 nm located within the mesopore walls; and 
   an active catalytic material impregnated on the hierarchical silica composite, the active catalytic material comprising
 nickel, nickel oxide, and/or nickel and iron mixed metal oxide, and 
 at least one cation dopant selected from the group consisting of Nb 5+ , Al 3+ , Ti 4+ , Ta 5+ , and Bi 5+  and/or oxides thereof. 
   
     
     
         21 . The catalyst of  claim 20 , wherein the mesopores have a pore volume in the range of 0.9-1.5 cm 3 /g and a surface area in the range of 1,000-1,600 m 2 /g.