Versatile NiO/mesoporous carbon nanodisks: controlled synthesis from hexagon shaped heterobimetallic metal–organic frameworks

Abstract

Hexagonal NiO/mesoporous carbon nanodisks (NiO/MCN) are facilely and controllably synthesized via constructing nickel-zinc trimesic acid heterobimetallic metal-organic framework (HMOF) disks before pyrolysis at 910 °C. Tailoring the Ni/(Zn + Ni) feed ratio and the reaction time during the HMOF synthesis creates a well-defined hexagonal carbon nanodisk with properly populated NiO nanocrystals while maintaining high porosity and conductivity. Such an elaborately fabricated NiO/MCN is highly stable, and exhibits the largest specific capacitance of 261 F g and the highest specific activity factor of 1.93 s g of any composite nanodisk during the capacitive test and 4-nitrophenol reduction, respectively.

Highly Cuboid-Shaped Heterobimetallic Metal–Organic Frameworks Derived from Porous Co/ZnO/C Microrods with Improved Electromagnetic Wave Absorption Capabilities

“…15-0806). 33 Some weak peaks of ZnO 34,35 also appear in the XRD patterns of the three samples. The degree of graphitization was detected via Raman spectroscopy (Figure 2b).…”

“…Finally, Co nanoparticles can induce magnetic loss that attenuates EM energy. 9,35 The porous CZC with smaller RL and wider bandwidth at lower filler loading outperforms similar materials (Table 2). Therefore, this porous CZC is suitable for EM wave absorption applications.…”

“…Fourth, the well-separated carbon layers and the associated ZnO and Co provide more conductive paths, causing conduction loss (conductive paths are explained in the Supporting Information). Finally, Co nanoparticles can induce magnetic loss that attenuates EM energy. , The porous CZC with smaller RL and wider bandwidth at lower filler loading outperforms similar materials (Table ). Therefore, this porous CZC is suitable for EM wave absorption applications.…”