Abstract The intercalation of [Cu(Phen)(H2O)2]2+ (CuPhen) in montmorillonite (Mt) produces a stable hybrid material that is very efficient in removing NH3 from gas phase even at extremely low pressures. The process was studied by elemental analysis, X-ray powder diffraction, thermal analysis coupled with evolved gas mass spectrometry and DR UV–Vis, NMR and X-ray absorption spectroscopy. The adsorption of CuPhen on Mt consists of two consecutive steps. During the first one, CuPhen intercalates alone into Mt through a cation exchange process, afterwards CuPhen and SO42− ions entry jointly into the mineral interlayer. The two-steps adsorption process is described by a VI-type isotherm, successfully fitted by two independent Frumkin isotherms. NH3 trapping is long-lasting, easy, fast even at extremely low gas pressure and reversible under mild conditions. Mt containing CuPhen always results well performant in removing ammonia from gas phase, but an appreciably higher adsorption capacity of NH3 is obtained when SO42− ion is absent from the interlayer. This hybrid montmorillonite is thus a promising material to be used in industrial or environmental contexts, as an efficient air-cleaner.

中文翻译：

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一种基于蒙脱石和 Cu(II)-菲咯啉络合物的新材料，可有效捕获气相中的氨

摘要 [Cu(Phen)(H2O)2]2+ (CuPhen) 在蒙脱石 (Mt) 中的嵌入产生了一种稳定的杂化材料，即使在极低的压力下也能非常有效地从气相中去除 NH3。通过元素分析、X 射线粉末衍射、热分析结合逸出气体质谱和 DR UV-Vis、核磁共振和 X 射线吸收光谱研究了该过程。CuPhen 在 Mt 上的吸附由两个连续的步骤组成。在第一个过程中，CuPhen 通过阳离子交换过程单独嵌入 Mt，然后 CuPhen 和 SO42− 离子共同进入矿物夹层。两步吸附过程由 VI 型等温线描述，由两个独立的 Frumkin 等温线成功拟合。NH3 捕集是持久的，容易的，即使在极低的气压下也很快，并且在温和条件下可逆。含有 CuPhen 的 Mt 总是能很好地从气相中去除氨，但当中间层中不存在 SO42− 离子时，NH3 的吸附能力明显更高。因此，这种混合蒙脱石是一种很有前途的材料，可用于工业或环境环境，作为一种高效的空气净化器。