Synthesis, characterization and tin/copper–nitrogen substitutional effect on photocatalytic activity of honeycomb ordered P2-Na₂Ni₂TeO₆

Hydrothermal Synthesis of Ni3TeO6 and Cu3TeO6 Nanostructures for Magnetic and Photoconductivity Applications

“…The NTO_CP sample (Figure a) presents mainly the characteristic peaks of the phase Ni 3 TeO 6 . However, in this methodology is also observed a peak at 2θ = 18.46°, indicating that Na has been incorporated in the crystalline structure of Ni 3 TeO 6 forming the crystal phase Na 2 Ni 2 TeO 6 (PDF 00-058-0052), as it was observed previously in the literature for materials synthesized by solid-state methodology. , This effect is also observed in CTO_CP (see Figure b), where the material, prepared by coprecipitation, shows the characteristic peak (2θ = 18.94°) of the crystalline metal tellurate Na 2 Cu 2 TeO 6 (PDF 04-011-7562). This evidence makes clear that the co-precipitation approach at pH = 7 using NaOH favors the incorporation of Na in the crystal structure of the metal tellurates forming multiphase compounds.…”

Honeycomb layered oxides: structure, energy storage, transport, topology and relevant insights

“…Recent reports are also emerging on honeycomb layered oxides as photocatalysts, optical materials, superfast ionic conductors, and so forth. [12][13][14][250][251][252]254,255,267,[441][442][443][444] A grand challenge with most of these materials lies in their handling. Particularly for honeycomb layered oxides comprising alkali ions with large radii such as potassium and rubidium, handling demands the presence of a controlled atmosphere (videlicet, storage in argon-purged glove boxes) as they are sensitive to moisture (hygroscopic) and air.…”

Crystal Growth and the Magnetic Properties of Na2Co2TeO6 with Quasi-Two-Dimensional Honeycomb Lattice

“…In recent years, the potentially unconventional electronic and magnetic properties of the honeycomb structure formed by magnetic atoms have attracted much attention in condensed matter physics. A series of layered compounds have been prepared by solid-state reaction or flux method, and their basic magnetic properties have been investigated. − As a honeycomb-type layered oxide, it is found that Na 3 Co 2 SbO 6 adopted a “zigzag” antiferromagnetic (AFM) structure at low temperatures, which results in increasing the complex influence of next-nearest-neighbor exchange in determining the ground state . Recently, some studies have been done on the field-induced magnetization processes of extended Heisenberg–Kitaev models for the honeycomb lattice, such as α-RuCl 3 and Na 2 IrO 3 .…”