Method for producing mesoporpus nanoscale iron-containing metal particles

Abstract

A method for producing mesoporous nanoscale iron-containing metal particles includes the steps of: adding dropwise a reducing agent into an iron salt containing aqueous solution under a condition that the molar ratio of the reducing agent to the iron salt ranges from 6 to 10 times the stoichiometric ratio of the reducing agent to the iron salt to produce mesoporous nanoscale iron-containing metal particles; separating the mesoporous nanoscale iron-containing metal particles from the aqueous solution; and drying the mesoporous nanoscale iron-containing metal particles.

1 . A method for producing mesoporous nanoscale iron-containing metal particles, comprising the steps of: 
 adding dropwise a reducing agent into an iron salt containing aqueous solution under a condition that the molar ratio of the reducing agent to the iron salt ranges from 6 to 10 times the stoichiometric ratio of the reducing agent to the iron salt to produce mesoporous nanoscale iron-containing metal particles;    separating the mesoporous nanoscale iron-containing metal particles from the aqueous solution; and    drying the mesoporous nanoscale iron-containing metal particles.    
     
     
         2 . The method of  claim 1 , further comprising a step of adding a catalytic non-iron metal-salt into the iron salt containing aqueous solution after the reducing step.  
     
     
         3 . The method of  claim 1 , wherein the adding rate of the reducing agent ranges from 0.185 to 0.55 ml/sec based on one liter of the iron salt containing aqueous solution.  
     
     
         4 . The method of  claim 1 , wherein the iron salt is a compound selected from the group consisting of: ferric chloride, ferrous chloride, ferric sulfide, ferrous sulfide, ferric nitride, ferrous nitride, ferric bromide, ferrous bromide, and combinations thereof.  
     
     
         5 . The method of  claim 1 , wherein the reducing agent is selected from the group consisting of: sodium borohydride, potassium borohydride, lithium borohydride, sodium carbonate, potassium carbonate, sodium hydroxide, potassium hydroxide, lithium hydroxide, methanol, ethanol, lithium aluminum tetrahydride, ammonium ion, hydrazine, citric acid, sodium citrate, potassium citrate, and combinations thereof.  
     
     
         6 . The method of  claim 2 , wherein the catalytic non-iron metal salt is selected from the group consisting of: palladium salt, rhodium salt, platinum salt, iridium salt, ruthenium salt, osmium salt, gold salt, nickel salt, copper salt, manganese salt, zinc salt, cobalt salt, vanadium salt, and combinations thereof.  
     
     
         7 . The method of  claim 1 , wherein the pH value in the mixture of the reducing agent and the iron salt containing aqueous solution ranges from 6 to 11.  
     
     
         8 . A method for producing mesoporous nanoscale iron-containing metal particles, comprising the steps of: 
 adding dropwise an iron salt containing aqueous solution into a reducing agent under a condition that the molar ratio of the reducing agent to the iron salt ranges from 4 to 10 times the stoichiometric ratio of the reducing agent to the iron salt to produce mesoporous nanoscale iron-containing metal particles;    separating the mesoporous nanoscale iron-containing metal particles from the aqueous solution; and    drying the mesoporous nanoscale iron-containing metal particles.    
     
     
         9 . The method of  claim 8 , further comprising a step of adding a catalytic non-iron metal salt into the iron salt containing aqueous solution after the reducing step.  
     
     
         10 . The method of  claim 8 , wherein the iron salt is a compound selected from the group consisting of: ferric chloride, ferrous chloride, ferric sulfide, ferrous sulfide, ferric nitride, ferrous nitride, ferric bromide, ferrous bromide, and combinations thereof.  
     
     
         11 . The method of  claim 8 , wherein the reducing agent is selected from the group consisting of: sodium borohydride, potassium borohydride, lithiumborohydride, sodium carbonate, potassium carbonate, sodium hydroxide, potassium hydroxide, lithium hydroxide, methanol, ethanol, lithium aluminum tetrahydride, ammonium ion, hydrazine, citric acid, sodium citrate, potassium citrate, and combinations thereof.  
     
     
         12 . The method of  claim 9 , wherein the catalytic non-iron metal salt is selected from the group consisting of: palladium salt, rhodium salt, platinum salt, iridium salt, ruthenium salt, osmium salt, gold salt, nickel salt, copper salt, manganese salt, zinc salt, cobalt salt, vanadium salt, and combinations thereof.  
     
     
         13 . The method of  claim 8 , wherein the pH value in the mixture of the reducing agent and the iron salt containing aqueous solution ranges from 6 to 11.