Composites of NiS₂ Microblocks, MoS₂ Nanosheets, and Reduced Graphene Oxide for Energy Storage and Electrochemical Detection of Bisphenol A

Abstract

Electrode material plays a critical role in both electrochemical energy storage and sensors, and there is an urgent need to develop novel electrode materials with high reactivity and catalytic activity. Herein, a multicomponent NiS2/MoS2/rGO electrode nanomaterial consisting of self-stacking NiS2 microblocks, hydrangea-like MoS2 nanosheets, and ultrathin reduced graphene oxide (rGO) nanolayers is synthesized via a facile two-step hydrothermal process. The ingenious combination of NiS2, MoS2, and rGO provides the nanocomposite good capacitance and sensitivity in electrochemical applications. As a result, the NiS2/MoS2/rGO nanocomposite exhibits a good specific capacitance of 645.3 F g–1 at 0.5 A g–1 and rate performance of 126.7 F g–1 at 10 A g–1. The assembled asymmetric supercapacitor of NiS2/MoS2/rGO//activated carbon delivers a high energy density of 19.4 Wh kg–1 at a power density of 156.1 W kg–1 for electrochemical energy storage. In addition, the electrochemical sensor based on a NiS2/MoS2/rGO nanocomposite modified onto glassy carbon electrode (GCE) shows superior activity toward detection of bisphenol A (BPA) compared with other reported electrochemical sensors. A wide linear range of 0.02–200 μM and a low detection limit of 2.1 nM can be obtained under the optimal conditions. This work provides insights into the development of multicomponent NiS2/MoS2/rGO electrode nanomaterial, including its facile synthesis method, good specific capacitance, and ultrasensitive detection of BPA, that exhibits bifunctional electrochemical applications.

Tunable construction of CuS nanosheets@flower-like ZnCo-layered double hydroxide nanostructures for hybrid supercapacitors

“…7g, the E d for NF@CS10-ZC-LDH4//NF@AC is better. [80][81][82][83][84][85][86][87][88] Remarkably, NF@CS10-ZC-LDH4//NF@AC maintained outstanding cyclability (88.4%) at 5 A g −1 even after 7000 cycles, and also a desired coulombic efficiency of 96.8% (Fig. 7h).…”

2D materials: increscent quantum flatland with immense potential for applications

“…The synergy effects of NiS 2 /MoS 2 /rGO provided increased conductivity and sensitivity. A lower detection limit of 2.1 nM with a linear range of 0.02–200 μM was reported [ 159 ]. Zhou et al used defect and phase-engineered Mn/ MoS 2 nanosheets for heavy metal ion detection.…”

Multilayered nanocomposite coatings for enhanced anticorrosive, flame retardant, and mechanical properties in automobile and aerospace industries

“…These NiS 2 nanoparticles have a close caged structure made up of concentric layers and multifaced polyhedral structure. As a result, it is proven that NiS 2 nanoparticles can be employed effectively as nanofiller for polymers 7–10 . Surface treatment of nanoparticles with organic compounds and their incorporation into GO surface could improve the bonding strength between the organic compounds and nanoparticles which in turn develop strong adhesion strength to the metal/alloy substrates.…”

“…As a result, it is proven that NiS 2 nanoparticles can be employed effectively as nanofiller for polymers. [7][8][9][10] Surface treatment of nanoparticles with organic compounds and their incorporation into GO surface could improve the bonding strength between the organic compounds and nanoparticles which in turn develop strong adhesion strength to the metal/alloy substrates. Highly compatible nanocomposite materials are created when the polymers and surface-modified multilayered nanoparticles interact.…”