Synthesis and Characterization of Nanomaterial Based on Halloysite and Hectorite Clay Minerals Covalently Bridged

Nanomaterials

Marina Massaro¹  CarmeloGiuseppe Colletti¹  Serena Riela¹  Cesar Viseras Iborra²  Fátima García-Villén²  Giuseppe Cavallaro³  Giuseppe Lazzara³ 

[1] Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo Viale delle Scienze, Ed. 17 90128 Palermo, Italy;Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, Campus of Cartuja, University of Granada, 18071 s/n Granada, Spain;Department of Physics and Chemistry, University of Palermo, 90128 Palermo, Italy;

关键词: Halloysite nanotubes;    hectorite;    covalent linkage;    synthetic strategy;   

DOI  :  10.3390/nano11020506

来源: DOAJ

【 摘 要 】

Halloysite is an aluminosilicate clay with a predominantly hollow tubular structure (HNTs) able to act as a nanocontainer for the encapsulation of several chemicals. However, HNTs possess low affinity for metal ions in their pristine form and they need to be modified for improving their adsorption capabilities. Therefore, to overcome this issue herein we report a straightforward approach for the covalent modification of the external surface of halloysite nanotubes with hectorite clay. Compared to halloysite, hectorite possesses a lamellar structure with higher cation exchange capacity. The covalent linkage between the two clays was verified by several techniques (FTIR spectroscopy, ¹³C CP-MAS NMR, TGA, ζ-potential, DLS, and XRD measurements) and the morphology was imaged by TEM investigations. As proof of concept the adsorption ability of the obtained nanomaterial in comparison to pristine clays was proved using ciprofloxacin and silver ions chosen as models for their different chemical characteristics.

【 授权许可】

Unknown