Facile fabrication of corrosion-resistant superhydrophobic and superoleophilic surfaces with MnWO4:Dy3+ microbouquets

Abstract

Superhydrophobic and superoleophilic MnWO₄:Dy³⁺ microbouquets were successfully fabricated via a facile hydrothermal process. The surface morphologies and chemical composition were investigated by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). The wettability of the as-synthesized MnWO₄:Dy³⁺ microbouquet film was studied by measuring the water contact angle (CA). A static CA for water of 165° and a very low sliding angle (SA) were observed, which were closely related to both the MnWO₄:Dy³⁺ microbouquet structure and chemical modification. Furthermore, the as-prepared MnWO₄:Dy³⁺ surface showed superhydrophobicity for some corrosive liquids such as aqueous basic and salt solutions.