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

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 degrees 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.