Статья

Role of Impurities in Kaolinite Intercalation and Subsequent Formation of Nanoscrolls

Shilong ZhangPolymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United StatesQinfu LiuSchool of Geological Science and Survey Engineering, China University of Mining and Technology, Beijing 100083, ChinaJuan-Juan LuoSchool of Physics and Electronics, Qiannan Normal University for Nationalities, Duyun 558000, ChinaNa YangSchool of Physics and Electronics, Qiannan Normal University for Nationalities, Duyun 558000, ChinaYi ZhangSchool of Physics and Electronics, Qiannan Normal University for Nationalities, Duyun 558000, ChinaLiu YangSchool of Public Health, Nantong University, Nantong 226019, ChinaLuyi SunDepartment of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States

2023en

ABI

Аннотация

Kaolinite (Kaol)–methanol (MeOH) compounds (Kaol-Me) are widely used as the starting materials for further intercalation. The conventional approach to prepare Kaol-Me compounds is to wash dimethyl sulfoxide (DMSO)-intercalated Kaol (Kaol-DMSO) for 16 days, and MeOH must be refreshed every day. Herein, we report a new and much more efficient method to prepare Kaol-Me from Kaol-DMSO by the promotion of AlCl3 under mild conditions, and the corresponding mechanism is investigated. The X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and X-ray fluorescence characterization results reveal that the electric double layer resulting from the impurities absorbed on the kaolinite surface prevents weakly polar molecules from entering the kaolinite interlayers, which is probably the key reason that MeOH must be refreshed daily in the preparation of Kaol-Me compounds. After being treated with HCl to remove the impurities, Kaol-Me-HCl was successfully intercalated by cetyltrimethyl ammonium bromide and subsequently predominantly curled into nanoscrolls.

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Идентификаторы

DOI: 10.1021/acs.inorgchem.3c01263

Цитирования и источники

Цитирований: 2Использованных источников: 0

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