Synthesis,Characterization And Performance Of Inorganic Supramolecular Nanomaterials With An Electric Double Layer

Layered material is an important part of the family of inorganic compounds. However, Ionic layered materials are generally composed of a rigid and stable layered nano-sheet and interlayer ion. The construction of new inorganic functional materials with a rigid and stable layered nano-sheet of layered materials is of great significance and application prospects, and is favored by more and more researchers.In this paper, a variety of inorganic supramolecular nanomaterials with an electric double layer were synthesized by using sheets of like-montmorillonite, montmorillonite and hydrotalcite as substrate. The obtained samples were characterized by XRD, SEM, HRTEM, FT-IR, pyridine infrared and other analytical methods. The catalytic performance of the obtained materials were investigated by esterification reaction of the synthesis of butyl acetate as a probe reaction. The main results of this paper are as followings:(1) Using sodium silicate as silicon source, magnesium nitrate and aluminum nitrate as raw materials by hydrothermal method successfully synthesized like-montmorillonite of a class of cationic layered materials. The obtained montmorillonite can be easily exfoliated in water, and the colloid solution containing stable and rigid sheet of like-montmorillonite. is obtained. The colloidal solution is flocculated by adding hydrochloric acid solution, and then we can obtain inorganic supramolecular nanomaterials with an electrical double layer. Under the best catalytic condition, Studies have shown that the synthesis of the materials in the synthesis reaction of butyl acetate showed good catalytic performance. The conversion rate of butanol reached 88.2%, the product selectivity was 100%.(2) Montmorillonite was intercalated and acid under certain conditions, and the results showed that intercalated montmorillonite and acided montmorillonite were successfully obtained. The intercalated montmorillonite and the acid montmorillonite are exfoliated in water, and the corresponding colloid solution is obtained under the condition of high speed shearing. The colloidal solution is flocculated by adding hydrochloric acid solution, and then we can obtain inorganic supramolecular nanomaterials with an electric double layer. Under the best catalytic condition, the inorganic supramolecular materials with an electrical double layer formed by intercalated montmorillonite showed the same good catalytic performance in the reaction of synthesis of butyl acetate. The conversion rate of butanol reached 85.2%, the product selectivity was 100%.(3) Using hydrothermal method, hydrotalcite was successfully synthesized. Synthesized hydrotalcite can be easily exfoliated in formamide. Mixing exfoliated hydrotalcite and exfoliated like-montmorillonite, we can obtain self-assembly nano-composite materials with an electrical double layer of hydrotalcite and like-montmorillonite. The layer spacing of synthesized nano-composite materials is about 2.1 nm, is exactly equal to layer spacing of the hydrotalcite and the like-montmorillonite. Under the best catalytic condition, the obtained materials also showed the same good catalytic performance in the reaction of synthesis of butyl acetate. The conversion rate of butanol reached 82.1%, the product selectivity was 100%.