In Situ Fabrication of Nanoneedles with Hierarchical Structure Cobalt Nitride on Nickel Foam with Superhydrophobic

Abstract

Co5.47N nanoneedles with hierarchical structure were fabricated on nickel foam, and then grafting with 1H,1H,2H,2H-perfluorodecyltrimethoxysilane. The samples were characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The as-prepared nickel foam samples exhibited both super-hydrophobicity and super-lipophilicity. The water contact angle (WCA) of the as-prepared nickel foam was 156°, and oil drops could penetrate through the sample within 13ms. The superhydrophobic nickel foam can be used as an ideal material for oil-water separation, due to its superhydrophobic and superlipophilic properties.