A simple in situ synthesis of magnetic M@CNTs by thermolysis of the hybrid perovskite [TPrA][M(dca)3]. (23rd March 2017)

• Record Type: Journal Article
• Authors: Bermúdez-García, Juan Manuel; Yáñez-Vilar, Susana; García-Fernández, Alberto; Sánchez-Andújar, Manuel; Castro-García, Socorro; Mira, Jorge; Moreira, Joaquim Agostinho; Centeno, Teresa A.; Señarís-Rodríguez, María Antonia
• Is Part Of: New journal of chemistry. Volume 41:Number 8(2017)
• Page Start: 3124
• Page End: 3133
• Publication Date: 2017-03-23
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj03672d
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The incorporation of dicyanamide blocks in hybrid perovskites is a good strategy for the easy synthesis of M@CNTs. Abstract : In this work, the incorporation of dicyanamide building blocks in organic–inorganic hybrid compounds is found to be a promising strategy for the synthesis of multiwalled carbon nanotubes embedded with magnetic nanoparticles (M@CNTs). Following a novel one-step, scalable and fast synthetic route, M@CNTs are obtained by simple calcination of the organic–inorganic hybrid perovskite [TPrA][M(dca)3 ] (TPrA = tetrapropylammonium, M = Ni 2+ and Co 2+, dca = dicyanamide). The resulting M@CNTs (M = Ni and Co) display a regular morphology and an essentially mesoporous network of ∼250 m 2 g −1, whereas the Co@CNT composite displays a broad pore size distribution (PSD) up to 6 nm, Ni@CNTs show a strictly controlled unimodal PSD, centered at around 5 nm. Monitoring of their thermal decomposition by X-ray diffraction, electron microscopy, thermogravimetric and spectroscopic analyses allows proposing a calcination mechanism and establishing the conditions to obtain optimal materials. Moreover, magnetization studies reveal a ferromagnetic behaviour of the obtained M@CNTs, with small coercive fields due to the size of the magnetic nanoparticles. In addition, preliminary assays of oil adsorption–desorption capacity reveal a promising potential for spilled oil recovery using this easily-synthesized materials. All these physicochemical properties make these composites good candidates for other nitrogen-rich CNT common applications.