Facile Preparation of MgO Nanoparticles by Microwave‐Assisted Sol‐Gel Hydrothermal Method towards the Paraoxon Pollutants Degradation

Abstract The nanosized MgO (Mw‐MgO) was synthesized from Mg(OH) 2 gel precursor via a microwave‐assisted sol‐gel hydrothermal method. Compared with the commercial MgO, the optimum Mw‐MgO was obtained by the calcining temperature at 500 °C, and the grain size was about 8.31 nm with a higher surface area of 213.5 m 2 /g. Meanwhile, such as‐prepared Mw‐MgO showed an excellent performance towards paraoxon degradation, and the maximum degradation amount was up to 43.62 mg/g@90 min at room temperature. The kinetic degradation trend was consistent with the pseudo‐second‐order model (R 2 >0.99). The degradation mechanism of such Mw‐MgO was also revealed by using nitro blue tetrazolium (NBT) as a probe.