New insights into the mechanism of graphene oxide and radionuclide interaction through vacancy defects

TL;DR

This study investigates how vacancy defects in graphene oxide influence its ability to sorb radionuclides, using various advanced characterization techniques to understand the underlying mechanisms.

Contribution

It provides new insights into the interaction mechanisms between radionuclides and defective graphene oxide structures, which was not previously well-understood.

Findings

Vacancy defects enhance radionuclide sorption capacity.

Advanced spectroscopic techniques reveal specific interaction pathways.

Structural characterization links defects to sorption efficiency.

Abstract

The sorption of radionuclides by graphene oxides synthesized by different methods was studied through a combination of batch experiments with characterization by microscopic and spectroscopic techniques such as X-ray photoelectron spectroscopy (XPS), attenuated total reflection fourier-transform infrared spectroscopy (ATR-FTIR), high-energy resolution fluorescence detected X-Ray absorption spectroscopy (HERFD-XANES), extended X-ray absorption fine structure (EXAFS) and high resolution transmission electron microscopy (HRTEM).