Fig. 1From: 3D Hierarchical Bi2S3 Nanostructures by Polyvinylpyrrolidone (PVP) and Chloride Ion-Assisted Synthesis and Their Photodetecting Properties a The XRD pattern of the V-Bi2S3. The pattern shown at the bottom is the standard XRD card of Bi2S3 (JPCDS no. 17-0320). b–d The full spectra, Bi2f, and S2s region of the XPS spectrum of V-Bi2S3, respectivelyBack to article page