Macroscopic cross-linked Ni@C composite with high porosity by a novel salt-templating process

Xing Yu (1) , Xuewei Cui (1) , Annie Gagnoud (2) , Yves Fautrelle (2) , René Moreau (2) , Xi Li (1, 2)

1 Shanghai University
2 SIMaP - Science et Ingénierie des Matériaux et Procédés

A facile and scalable salt-templating strategy is developed for in situ synthesizing 3D porous Ni@C architecture composed of cross-linked belt-like microwires (bNi@C composite). During the process, self assembled NaCl particles as a structural template were adopted to not only serve as a porogen embedded inside to activate the formation of substantial macropores, mesopores and even micropores with largely increased BET surface area, but also control the morphologies of 3D carbon matrices by tuning the entanglement and cross-linking behaviors of PVA-based complexes. Meanwhile, the Ni nanoparticles are dispersed homogenously inside without aggregation, which have resulted the alteration of magnetic properties in presence of NaCl. The as-obtained ferromagnetic bNi@C composite exhibits a high adsorption capacity for Pb2+ with excellent recyclability. The above results suggest an interesting approach for controlling the morphology and properties of 3D carbon matrix by tuning the content of penetrated NaCl particles used for organo-inorganic co-assembly.

Mots clés: Salt-templating; 3D porous Ni@C composites; Porogen; Entanglement; Cross-link

Domaines: Matériaux

Xing Yu, Xuewei Cui, Annie Gagnoud, Yves Fautrelle, René Moreau, et al.. Macroscopic cross-linked Ni@C composite with high porosity by a novel salt-templating process. Journal of Alloys and Compounds, 2016, 687, pp.867-874. ⟨10.1016/j.jallcom.2016.06.248⟩. ⟨hal-01464063⟩