The Preparation Of Copper Organic Montmorillonite Nanoreactors And Their Catalytic Performance

Several kinds of montmorillonite nanoreactors were systematically investigated for the coupling of ammonia with aryl halides and the synthesis of indole-2-carboxylate in this paper. These copper organic montmorillonite nanoreactors were synthesized through ion exchange and impregnation reduction, and characterized by different methods. The main studies were as follows:First of all, these copper organic montmorillonite nanoreactors(Cu-Q-MMT) were prepared by ion exchange and impregnation reduction, and characterized by a variety of techniques, including Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), and X-ray photoelectron spectroscopy(XPS). The results show that the copper nanoparticles successfully load in the organically modified montmorillonite nanoreactor.Secondly, the catalytic activities of copper organic montmorillonite nanoreactors were studied by catalytic amination reaction of aryl halide. Compared with heterogeneous catalysts reported in the literature, Cu-Q2-MMT has high catalytic activity. The catalyst substrate extended indicates that Cu-Q2-MMT catalysts have good versatility. In addition, this nanoreactor can be recycled 17 times; the TEM and cycling performance test shows that this nanoreactor has a very high cycling stability.At last, we further prepared several different metal loadings of organic montmorillonite nanoreactor. N2-adsorption-desorption results showed increased metal loading, these materials still have mesoporous structure. The catalytic activities of copper organic montmorillonite nanoreactors were studied by catalytic synthesis of indole-2-carboxylic acid ester. The results show that these nanoreactor has a high catalytic activity, and with high versatility and cycling stability. More importantly, these nanoreactors can catalytic reaction of chlorobenzene formaldehyde.