Microwave-assisted synthesis of mesoporous MgO@Carbon hybrid nanocomposites to enhance the catalytic degradation of paraoxon toxin

A combination microwave-assisted hydrothermal and calcination method was used to produce serial mesoporous [email protected] ( [email protected] ) hybrid nanocomposites, which were studied and validated by TEM, XPS, XRD, and Raman spectra . The calcined [email protected] nanocomposites have a high specific surface area and small grain sizes with an enhanced capacity to degrade paraoxon after optimal preparation. The optimal [email protected] nanocomposites was obtained by the calcining temperature at 600 °C, and the particle size was about 6.4 ± 2 nm with a higher specific surface area of 255.6 m 2 /g. At room temperature, the decomposed amount of paraoxon toxins by [email protected] is ca. 55.65 mg/ [email protected]  min. Furthermore, the pseudo-second-order kinetic model (R 2 > 0.99) fits the experimental degradation data better. The enhanced degradation effect of [email protected] was verified due to the generations of more superoxide radical (·O 2 - ) and hydroxyl radical (·OH) active sites. A photothermal effect was also observed in the [email protected] sample. The removal efficiency increased 8-fold after being exposed to near-infrared (NIR) radiation at 808 nm compared to the non-irradiating sample. Because of their ease of manufacture, low cost, and high removal effectiveness, [email protected] nanocomposites could be a suitable adsorbent choice for eliminating organophosphorus hazardous contaminants.