CoSe2 grafted on 2D gC3N4: A promising material for wastewater treatment, electrocatalysis and energy storage

Porous nanosheet–nanosphere@nanosheet FeNi2-LDH@FeNi2S4 core–shell heterostructures for asymmetric supercapacitors

“…EIS graphs allow the determination of the volume resistance ( R s ), interfacial charge transfer resistance ( R ct ), and Warburg impedance ( Z w ), which are associated with the diffusion of ions in the electrolyte. 42 Typically, in the high frequency region, the diameter of the semicircle corresponds to R ct . As shown in the Nyquist curve in Fig.…”

Construction of Sugar‐Gourd‐Shaped Carbon Nanofibers Embedded with Heterostructured Zinc‐Cobalt Selenide Nanocages for Superior Potassium‐Ion Storage

“…[64] CoSe 2 and ZnSe have bandgaps of 2.8 eV (E c = 0 eV, E v = −2.8 eV) and 2.3 eV (E c = −0.35 eV, E v = 1.95 eV), respectively. [65,66] The energy level diagrams of CoSe 2 and ZnSe before contact are illustrated in Figure 6a. The higher Fermi level (E f ) of CoSe 2 facilitates the transfer of electrons from CoSe 2 to ZnSe across the phase interface until the system reaches Fermi level equilibrium.…”

Efficient photocatalytic reduction of p-nitrophenol under visible light irradiation based on Ag NPs loaded brown 2D g-C3N4 / g-C3N4 QDs nanocomposite

“…Therefore, numerous strategies have been developed for removing these organic pollutants from industrialized sewage, involving physisorption, chemical precipitation, membrane filtration, photocatalytic degradation, biological remedies, and catalytic decomposition, advanced oxidation processes (AOPs) (Chen et al 2023 ; Peng et al 2023 ; Tang et al 2023 ) and enzymatic degradation (Guo et al 2023 ). Heterogeneous photocatalysis is a promising approach that harnesses solar light to effectively oxidize contaminants under reasonable conditions (El-Hosainy et al 2022 ; El-Sheshtawy et al 2020 ; Ghubish et al 2022 ; Shoueir et al 2019 ; Dileepkumar et al 2022 ; Prabagar et al 2022 ).…”

“…Graphitic carbon nitride (g-C 3 N 4 ) is one of the promising semiconductor photocatalyst materials with a layered structure that has a lot of covalent and hydrogen bonds and functions as an organic conjugated semiconductor photocatalyst. G-C 3 N 4 has gained great attraction as a semiconductor in various applications due to its high stability, cost-effectiveness, excellent performance for solar energy use and a small band gap (2.82 eV) (Chen et al 2023 ; Torad et al 2021 ; Wang et al 2009b ; Dileepkumar et al 2022 ; Prabagar et al 2022 ), which can effectively satisfy the thermodynamic needs of different photo-redox processes (Wang et al 2009a ; Zhang et al 2010 ). Nevertheless, the practical utilization of unmodified g-C 3 N 4 is hindered by its low specific surface area, limited responsiveness to visible light (wavelengths less than 460 nm), and rapid recombination of photogenerated electron–hole pairs (Chen et al 2023 ).…”