Preparation of modified magnesium hydroxide using CO2 and investigation of its properties

In this study, carbon dioxide (CO 2 ) and magnesium oxide (MgO) were employed as raw materials to develop a method for preparing multilayer plate-like magnesium hydroxide (MH) via CO 2 utilization, followed by surface modification with stearic acid (SA). The products were characterized by using Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR) to analyze their crystal plane distribution, morphology, and functional groups. In addition, thermogravimetric analysis (TGA) was conducted to investigate the decomposition temperatures. Furthermore, molecular dynamics simulations were performed to elucidate the structural arrangement of SA on the MH surface. This work proposes a novel strategy for synthesizing active MH by employing gaseous CO 2 instead of conventional industrial precursors, thereby reducing environmental pollution, lowering production costs, and enabling a milder reaction process. The findings provide theoretical guidance for the subsequent development of cost-effective and environmentally friendly industrial-scale production.