Fig. 5From: Photocathodic Protection of 304 Stainless Steel by Bi2S3/TiO2 Nanotube Films Under Visible LightXPS survey spectra of the synthesized Bi2S3/TiO2 (a) and high-resolution XPS spectra of O 1s of TiO2 and Bi2S3/TiO2 (b)Back to article page