Acoustotemplating: rapid synthesis of freestanding quasi-2D MOF/graphene oxide heterostructures for supercapacitor applications

Abstract

Two-dimensional (2D) graphitic materials are often incorporated with metal–organic frameworks (MOFs) to compensate for the poor electrical conductivity of the latter, particularly if they are to be used for electrochemical...

In Situ Synthesis of Ni-BTC Metal–Organic Framework@Graphene Oxide Composites for High-Performance Supercapacitor Electrodes

“…An O–H absorption peak at 3416 cm –1 reveals that some carboxyl groups are not fully deprotonated, which accounts for some free carboxylates. Finally, the peak at 1637 cm –1 confirms the coordination of Ni with −COO– moieties. , …”

“…The (001) reflection of GO corresponds to the peak at 2θ = 10.1°. 46 Characteristic peaks of Ni-BTC are in complete agreement with the literature. 45 The characteristic peak of GO disappears in the XRD patterns of Ni-BTC@GO composites, which may result from the following: (i) The greater randomness of GO dispersion on the Ni-BTC surface decreases the aggregation state and orderliness of lamellar GO.…”

“…Finally, the peak at 1637 cm −1 confirms the coordination of Ni with −COO− moieties. 39,46 To further characterize the morphology of the as-prepared composites visually, SEM images are shown in Figure 3. Ni-BTC crystals are uniform octahedral particles with smooth surfaces, the dimensions of which are about 5 μm (Figure 3a).…”

“…Figure a depicts the XRD results of GO, Ni-BTC, Ni-BTC@GO 1, Ni-BTC@GO 2, and Ni-BTC@GO 4. The (001) reflection of GO corresponds to the peak at 2θ = 10.1° . Characteristic peaks of Ni-BTC are in complete agreement with the literature .…”

Design of Pd–Zn Bimetal MOF Nanosheets and MOF-Derived Pd3.9Zn6.1/CNS Catalyst for Selective Hydrogenation of Acetylene under Simulated Front-End Conditions

“…Metal–organic framework (MOF) nanosheets are a new kind of 2D nanomaterial that has received increasing attention recently, owing to their high porosity, large surface area, easy access to active sites and numerous structural possibilities [ 1 , 3 , 4 , 5 ]. The use of 2D MOF nanosheets is showing potential for application in many fields, such as molecular sieving [ 6 , 7 ], luminescent sensing [ 8 , 9 ], energy storage and conversion [ 10 , 11 ], catalysis [ 12 , 13 ] and biomedicine [ 14 , 15 ]. Conventionally, the preparation of 2D MOF nanosheets usally requires special preparation strategies, such as ultrasonication exfoliation [ 16 ] layer-by-layer growth, [ 17 ], three-layer synthesis [ 18 ], liquid exfoliation [ 1 ] and surfactant-assisted synthesis [ 19 ].…”