A rapid and efficient synthesis strategy of MgAl-LDH was proposed. MgAl-LDH with high specific surface area was synthesized in situ by using η-Al₂O₃ as carrier, and the synthesis time was greatly shortened by both increasing temperature and introducing ethanol as co-solvent. Besides, the growth process of MgAl-LDH on the surface of η-Al₂O₃ is also revealed. Under optimized conditions, the specific surface area of the MgAl-LDH is as high as 172.4 m²/g, the crystalline size is as small as 12.82 nm, and the basicity can reach 1.795 mmol/g. The urea wastewater was degraded from 8000 mg/L to 6.85 mg/L over the catalyst synthesized by the rapid method, and the catalyst still maintains high activity after four uses. Also, it was found that there is a good linear relationship between the urea removal rate and the basicity of MgAl-LDH.

提出了一种快速高效的MgAl-LDH合成策略。以η- Al ₂ O ₃为载体原位合成具有高比表面积的MgAl-LDH，通过增加温度和引入乙醇作为助溶剂，大大缩短了合成时间。此外，还揭示了MgAl-LDH在η- Al ₂ O ₃表面的生长过程。在最佳条件下，MgAl-LDH的比表面积高达172.4 m ²/ g，晶体尺寸小至12.82nm，且碱度可达到1.795mmol / g。与快速法合成的催化剂相比，尿素废水从8000 mg / L降解为6.85 mg / L，经过四次使用后，催化剂仍保持高活性。另外，还发现尿素去除率与MgAl-LDH的碱度之间具有良好的线性关系。