New Synthetic Route for the Growth of α-FeOOH/NH₂-Mil-101 Films on Copper Foil for High Surface Area Electrodes

Abstract

A novel metal organic framework (MOF)-based composite was synthesized on a Cu substrate via a two-step route. An amorphous iron oxide/hydroxide layer was first deposited on a Cu foil through a sol–gel process; then, Fe-NH2-Mil-101 was grown using both the iron oxide/hydroxide matrix, which provided the Fe3+ centers needed for MOF formation, and 2-aminoterephthalic acid ethanol solution. This innovative synthetic strategy is a convenient approach to grow metal oxide/hydroxide and MOF composite films. Structural, chemical, and morphological characterizations suggest that the obtained composite is made up of both the α-FeOOH goethite and the NH2-Mil-101 phases featuring a hybrid heterostructure. The electrochemical features of the composite structure were investigated using electrochemical impedance spectroscopy. The impedance behavior of the α-FeOOH/NH2-Mil-101 films indicates that they can be used as efficient high surface area metal hydroxide/MOF-based electrodes for applications such as energy storage and sensing.

Synthesis of MIL-Modified Fe3O4 Magnetic Nanoparticles for Enhancing Uptake and Efficiency of Temozolomide in Glioblastoma Treatment

“…A broad and very low signal was detected below 10° in the diffractogram of MNPs@MIL[a] and slightly more intense broad signals in the range 4–5° and 6–8° in the case of MNPs@MIL[b] obtained in the presence of FeCl 3 . These broad signals at low 2θ values are in the typical region observed for MIL phases and, in particular, for the MIL-101 phase [ 35 , 46 ]. The XRD patterns of MIL-101 powders is reported as a reference in the insert of Figure 2 a.…”

“…In particular, the peak at 1250 cm −1 is typical of C-N symmetric and asymmetric stretching of the amino group. In addition, the signals at 1310–1420 cm −1 and 1510–1590 cm −1 are due to the COO − symmetric and asymmetric stretching of the terephthalate ligands [ 46 , 47 ].…”

Fabrication of 3D Amino-Functionalized Metal–Organic Framework on Porous Nickel Foam Skeleton to Combinate Follicle Stimulating Hormone Antibody for Specific Recognition of Follicle-Stimulating Hormone

“…The satellite peak with a binding energy of 714.8 eV indicates the presence of Fe in a +3 oxidation state. 43 , 50 A strong peak at about 529.7 eV corresponds to O 1s ( Figure 4 c). Figure 4 d represents the deconvolution peak of C 1s.…”

“…The Fe 2p spectrum results in two peaks appeared at a binding energy of 709.2 and 722.1 eV for Fe 2p 3/2 and Fe 2p 1/2 (Figure b). The satellite peak with a binding energy of 714.8 eV indicates the presence of Fe in a +3 oxidation state. , A strong peak at about 529.7 eV corresponds to O 1s (Figure c). Figure d represents the deconvolution peak of C 1s.…”

“…The satellite peak with a binding energy of 714.8 eV indicates the presence of Fe in a +3 oxidation state. 43,50 A strong peak at about 529.7 eV corresponds to O 1s (Figure 4c). On the basis of this knowledge, it can be evident that the asprepared H 2 N−Fe-MIL-101 MOFs are mesoporous materials.…”