N-doped porous carbon with ZIF-67-derived CoFeO-Fe particles for supercapacitors.

The development of novel materials for electrodes with high energy densities is essential to the advancement of energy storage technologies. In this study, N-doped layered porous carbon with ZIF-67-derived binary CoFeO-Fe particles was successfully fabricated by the pyrolysis of an Fe-based chitosan (CS) hydrogel mixed with ZIF-67 particles. Various characterization techniques were employed to assess the performance of the prepared porous CoFeO-Fe@NC composite.

Designed formation of C/FeO@Ni(OH) cathode with enhanced pseudocapacitance for asymmetric supercapacitors.

The rational design and synthesis of advanced electrode materials are significant for the applications of supercapacitors. Ferroferric oxide (FeO), with its high theoretical capacitance is a renowned cathode material. Nevertheless, its low electronic conductivity and poor cycling stability during a long-term charge/discharge process limit its large-scale applications.

Construction of nickel ferrite nanoparticle-loaded on carboxymethyl cellulose-derived porous carbon for efficient pseudocapacitive energy storage.

The preparation of biomass-derived carbon electrode materials with abundant active sites is suitable for development of energy-storage systems with high energy and power densities. Herein, a hybrid material consisting of highly-dispersed nickel ferrite nanoparticle on 3D hierarchical carboxymethyl cellulose-derived porous carbon (NiFeO/CPC) was prepared by simple annealing treatment. The synergistic effects of NiFeO species with multiple oxidation states and 3D porous carbon with a large specific surface area offered abundant active centers, fast electron/ion transport, and robust structural stability, thereby showing the excellent performance of the electrochemical capacitor.

Alginate modified graphitic carbon nitride composite hydrogels for efficient removal of Pb(II), Ni(II) and Cu(II) from water.

The removal of heavy metal ions is of great significance to the friendly development of the environment. Herein, alginate modified graphitic carbon nitride composite hydrogels (g-CN/SA) were successfully synthesized through a facile cross-linking polymerization method. This novel composite hydrogels were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS).