The chemistry of ZnWO₄ nanoparticle formation

Abstract

The need for a new approach to describing nanoparticle nucleation and growth different from the classical models is highlighted. In and ex situ total scattering experiments combined with additional characterization techniques are used to unravel the chemistry dictating ZnWO4 formation.

There's no place like real-space: elucidating size-dependent atomic structure of nanomaterials using pair distribution function analysis

“…[203][204][205][206] In situ PDF studies, on the other hand, allow for identication and characterization of disordered or amorphous intermediate structures and species in solution, which are important in nanomaterials. For example, in studies of nanomaterial synthesis, in situ PDF analysis gives the possibility for studying the atomic structure of the species present before, during and aer crystallization of nanoparticles, 183,[207][208][209][210][211][212][213][214][215][216][217][218][219] which is essential for gaining a deeper understanding of material nucleation processes, where atomic scale mechanistic information generally is scarce. Knowledge of the relation between chemical synthesis and the resulting atomic structure of the material is crucial in the advancement of nanoscience.…”

Concurrent Synthesis of Zero- and One-Dimensional, Spherical, Rod-, Needle-, and Wire-Shaped CuO Nanoparticles byProteus mirabilis10B

“…EDX spectrum of Cl − was detected with a clear signal (53%) in CuO-NPs (extracellular) and absent in CuO-NPs (intracellular) (Figure 3). Finally, there was no common mechanism that could describe the nucleation and growth of metal oxide NPs due to the complicated variations in the chemical reaction mechanism within a production system, especially biological one as referred by Bøjesen et al [65]. Therefore, more studies are ongoing in our lab nowadays for the selective synthesis of CuO-NPs with controlled size and shape in time-dependent monitoring method.…”

Eu2+ and Eu3+ Doubly Doped ZnWO4 Nanoplates with Superior Photocatalytic Performance for Dye Degradation

“…All the metal-oxygen octahedra are distorted from perfect octahedral geometry. As can be seen in the inset, the structure of ZnWO 4 is composed of zig-zag metal-oxygen chains made up of edge-sharing ZnO 6 and WO 6 octahedra [49]. Moreover, each (ZnO 6 –ZnO 6 ) n chain is interlinked to four chains of (WO 6 –WO 6 ) n and vice versa.…”

“…These hydroxyl radicals are very oxidative and non selective with redox potential of E 0 = 2.8 V to oxidize organic compounds into fragments [49]. That is why the the Eu-doped ZnWO4 nanoplates are active photocatalysts.…”