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The synthesis of superhydrophobic Bi2S3 complex nanostructures

In this paper, we report a biomolecule-assisted soft chemistry route for constructing complex Bi2S3 nanostructures that exhibit controlled wetting behavior. The as-synthesized sample was characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), field emission SEM (FE-SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), Fourier transform infrared (FT-IR), Raman, x-ray photoelectron (XPS) and photoluminescence (PL). The Raman spectra indicate that the surface optical (SO) phonon mode occurs in Bi2S3 nanoparticles. The SO phonon mode is attributed to the defects on the surface of Bi2S3 nanoparticles. In addition, the possible formation mechanism of the self-assembled urchin-like Bi2S3 complex nanostructures is discussed. The established complex nanostructure can control the surface topology of a membrane to create a superhydrophobic surface. A water contact angle (CA) of > 150° of the as-synthesized Bi2S3 complex nanostructures can be obtained, which may find potential application in environmental chemistry.