Polyol-mediated low-temperature synthesis of crystalline tungstate nanoparticles MWO4 (M = Mn, Fe, Co, Ni, Cu, Zn)

Taguchi method assisted optimization of electrochemical synthesis and structural characterization of copper tungstate nanoparticles

“…The structure of copper tungstate crystals could be distinguished as a triclinic distorted wolframite [16], while their unit-cell parameters could be presented as follows: a = 4.703 Å, b = 5.839 Å, c = 4.878 Å, α = 91.677 Å, β = 92.469 Å, and γ = 82.805 Å [17]. Meanwhile, the wolframite structure is including a framework of the oxygen atoms in a hexagonal close-packing, while the cations are occupying half of the octahedral sites.…”

“…In the structure of CuWO 4 , each copper atom is surrounded by six atoms of oxygen. Furthermore, it has been explained [17] that the atoms of copper and tungsten in the CuWO 4 crystal create the sequential layers located between the oxygen sheets. Thus, the infinite zigzag chains are formed by edge-sharing WO 6 and CuO 6 octahedra alternatively.…”

Upconversion assisted BiOI/ZnWO4:Er3+, Tm3+, Yb3+ heterostructures with enhanced visible and near-infrared photocatalytic activities

“…Visible light photocatalysts, i.e., metallic or nonmetallic element doped TiO 2 , 1 Bibased oxides, 2 and sulfur compounds, 3 have been widely studied, while the research efforts on the NIR photocatalysts are still needed to improve the NIR-driven photocatalytic activities. [10][11][12] As an n-type semiconductor with large band gap energy, ZnWO 4 has been also widely used for heterogeneous photocatalysis. [4][5][6][7][8] Up to now, the upconversion materials involved mainly focus on the uoride agents owing to their high upconversion emission efficiencies, while the physicochemical stabilities of uorides are really lower compared to metal oxides, 9 and the heterostructure properties are rarely present in the NIR photocatalysts with uoride/metal oxide structures.…”

Suppression of the commensurate magnetic phase in nanosized hübnerite MnWO4

“…However, MnWO 4 still has technological potential at ambient temperatures, for example in humidity sensors and efforts have been made to increase the active surface by varying crystallite size [18,19], changing morphology [20], or doping [21,22].…”