原矿和煅烧层状双氢氧化物作为低成本吸附剂的制备：三价阳离子对亚甲基蓝吸附的作用。

Departamento de Química Inorgánica, Universidad de Salamanca, 37008 Salamanca, Spain.

Molecules. 2023 Jun 12;28(12):4717. doi: 10.3390/molecules28124717.

Layered double hydroxides with the hydrotalcite-like structure, containing Mg, Al, and Fe (with different Al/Fe ratios) in the layers, have been synthesized and fully characterized, as have the mixed oxides formed upon their calcination at 500 °C. Both series of solids (original and calcined ones) have been tested for methylene blue adsorption. In the case of the Fe-containing sample, oxidation of methylene blue takes place simultaneously with adsorption. For the calcined samples, their reconstruction to the hydrotalcite-like structure plays an important role in their adsorption ability.

具有水滑石层状结构的层状双氢氧化物，其层中含有 Mg、Al 和 Fe（具有不同的 Al/Fe 比），已经被合成并进行了全面的表征，以及在 500°C 煅烧形成的混合氧化物。对这两个系列的固体（原始的和煅烧的）都进行了亚甲基蓝吸附测试。对于含铁样品，亚甲基蓝的氧化与吸附同时发生。对于煅烧的样品，它们重建为水滑石结构对其吸附能力起着重要作用。