title: Monolithic gyroidal mesoporous mixed titanium-niobium nitrides.
abstract: Mesoporous transition metal nitrides are interesting materials for energy conversion and storage applications due to their conductivity and durability. We present ordered mixed titanium-niobium (8:2, 1:1) nitrides with gyroidal network structures synthesized from triblock terpolymer structure-directed mixed oxides. The materials retain both macroscopic integrity and mesoscale ordering despite heat treatment up to 600 °C, without a rigid carbon framework as a support. Furthermore, the gyroidal lattice parameters were varied by changing polymer molar mass. This synthesis strategy may prove useful in generating a variety of monolithic ordered mesoporous mixed oxides and nitrides for electrode and catalyst materials.
authors.affiliation: Department of Chemistry and Chemical Biology, ‡Department of Materials Science and Engineering, §Department of Physics, ⊥Cornell High Energy Synchrotron Source (CHESS), and ∥Kavli Institute at Cornell for Nanoscale Science, Cornell University , Ithaca, New York 14853, United States.
authors.forename: Spencer W
authors.initials: SW
authors.lastname: Robbins
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Sai
authors.forename: Francis J
authors.initials: FJ
authors.lastname: DiSalvo
authors.forename: Sol M
authors.initials: SM
authors.lastname: Gruner
authors.forename: Ulrich
authors.initials: U
authors.lastname: Wiesner
mesh_terms: D011211:Electric Power Supplies; D004566:Electrodes; D006358:Hot Temperature; D057927:Hydrophobic and Hydrophilic Interactions; D008958:Models, Molecular; D008968:Molecular Conformation; D008970:Molecular Weight; D009556:Niobium / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D016062:Porosity; D014025:Titanium / Q000737:chemistry*; D014835:Volatilization
chemical_list: D009556:Niobium; D011092:Polyethylene Glycols; C041500:titanium nitride; D014025:Titanium