Surface and structural studies in a PbCrO4 Liesegang pattern with revert spacing

Ezzeddine, Dalia; El-Rassy, Houssam; Sultan, Rabih F.

doi:https://doi.org/10.1016/j.cplett.2019.136735

Surface and structural studies in a PbCrO4 Liesegang pattern with revert spacing

Files

2019-3649.pdf (1.15 MB)

Date

2019

Authors

Ezzeddine, Dalia

El-Rassy, Houssam

Sultan, Rabih F.

Publisher

Elsevier B.V.

Abstract

We present a novel study of a PbCrO4 Liesegang pattern exhibiting revert spacing. Scanning Electron Microscopy (SEM), Atomic Absorption Spectrometry (AAS) and Energy Dispersive X-ray (EDX) spectroscopy measurements are carried out, and are shown to support the adsorption of CrO42- on the precipitate, which becomes more enhanced as we move farther from the gel interface. Such an ascending differential adsorption scenario favors revert spacing over the direct spacing trend. © 2019 Elsevier B.V.

Keywords

Absorption spectroscopy, Atomic absorption spectrometry, Chromium compounds, Scanning electron microscopy, Differential adsorption, Energy dispersive x-ray, Liesegang patterns, Spectroscopy measurements, Structural studies, Lead compounds