Abstract
Superhydrophobic ZnO micro/nanocrystals were fabricated on a large scale using a facile one‐pot hydrothermal process successfully. The morphologies and chemical composition of as‐synthesized ZnO were investigated by the scanning electron microscope (SEM) and X‐ray powder diffraction (XRD). The morphology of ZnO products changed from uniform size microrods to flower‐like micronanostructures, when the temperature changed from 120°C to 180°C. The morphology of ZnO was strongly affected by the pH. The wettability of the as‐synthesized ZnO micro/nanocrystals was studied by measuring water contact angle (CA). The largest static CA for water is 167°, which is closely related to both the ZnO micro/nanostructure and chemical modification. Furthermore, the as‐prepared ZnO surface showed superhydrophobicity for some corrosive liquids such as basic and acidic aqueous solutions. The CAs of the surface modified with ZnO prepared at 160°C were over 155° in the range of pH = 1–13.
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