Mn-doped NiWO4 quantum dots with superior electrochemical and conductivity performance for energy storage application

La-doped NiWO4 coupled with reduced graphene oxide for effective electrochemical determination of diphenylamine

“…The vibrational modes of the wolframite-type tungstate consist of two groups, external (<600 cm −1 ) and internal (>600 cm −1 ) modes. 28,45,46 Internal modes are related to the vibration of the distorted [WO 6 ] octahedra in the lattice. The most intense band located at 887 cm −1 is assigned to the symmetric stretching vibration of WvO bonds.…”

“…Recent research has demonstrated that doping with heteroatoms is an effective strategy to further enhance the electrochemical performance of NiWO 4 by improving the electrical conductivity, creating defects and optimizing the electronic structure. 28–31 Varghese et al . reported a Bi 3+ doped NiWO 4 catalyst with enhanced photodegradation properties of organic dyes, which is generated from the tuned bandgap structure.…”

“…Recent research has demonstrated that doping with heteroatoms is an effective strategy to further enhance the electrochemical performance of NiWO 4 by improving the electrical conductivity, creating defects and optimizing the electronic structure. [28][29][30][31] Varghese et al reported a Bi 3+ doped NiWO 4 catalyst with enhanced photodegradation properties of organic dyes, which is generated from the tuned bandgap structure. 30 Pradhan et al synthesized Mn-doped NiWO 4 through a hydrothermal reaction, which resulted in improved conductivity and higher capacitance than pure NiWO 4 when used as the electrode material for supercapacitors.…”

“…30 Pradhan et al synthesized Mn-doped NiWO 4 through a hydrothermal reaction, which resulted in improved conductivity and higher capacitance than pure NiWO 4 when used as the electrode material for supercapacitors. 31 While there are still few reports on improving the performance of NiWO 4 as an electrochemical sensor by doping it with rare earth metals with special 4f orbitals. Graphene oxide (GO) is a typical two-dimensional nanomaterial with high stability and unique electronic properties, which can be further reduced to form reduced graphene oxide (rGO).…”