US 12,275,003 B1
Carbon-supported copper manganite nanoparticles for biofuel production
Mohamed Nady Abd El-Hameed Ibrahim, Riyadh (SA); and Abd El-Aziz Ahmed Said, Assiut (EG)
Assigned to IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY, Riyadh (SA)
Filed by IMAM MOHAMMAD IBN SAUD ISLAMIC UNIVERSITY, Riyadh (SA)
Filed on Dec. 6, 2024, as Appl. No. 18/971,324.
Int. Cl. B01J 23/84 (2006.01); B01J 21/18 (2006.01); B01J 35/30 (2024.01); B01J 35/45 (2024.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); C07C 45/00 (2006.01)
CPC B01J 23/84 (2013.01) [B01J 35/397 (2024.01); B01J 35/45 (2024.01); B01J 37/04 (2013.01); B01J 37/086 (2013.01); C07C 45/002 (2013.01); B01J 21/18 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of preparing nanoparticles of carbon-supported copper manganite (CuMn2O4), the method comprising:
preparing a first solution of a copper (II) salt and a manganese salt in a first polar organic solvent, wherein the molar ratio of Cu:Mn is from about 0.8:1 to about 1.2:1;
admixing a second solution of an organic ligand in a second polar organic solvent with the first solution to form a first mixture, wherein the second polar organic solvent is miscible with said first polar organic solvent;
hydrothermally heating the first mixture at a temperature of from about 100° C. to about 200° C. for a sufficient duration to form a solid metal-organic framework composite material; and,
calcining said metal-organic framework composite material at a temperature of from about 350 to about 600° C.,
wherein the copper manganite (CuMn2O4) of the nanoparticles has a crystalline spinel lattice which comprises copper in each of the Cu+ and Cu2+ oxidation states and comprises manganese in each of the Mn3+ and Mn4+ oxidation states; and,
further wherein a fraction of the nanoparticles have a core-shell morphology in which a shell of elemental carbon at least partially encapsulates a core nanoparticle of copper manganite (CuMn2O4).