fig2
Figure 2. (A) XPS survey; (B) deconvoluted Bi 4f spectrum; (C) deconvoluted Se 3d spectrum; (D) deconvoluted C 1s spectrum; (E) deconvoluted N 1s spectrum; and (F) TG profile of 3D Bi2Se3@N-C microspheres in an air atmosphere. XPS: X-ray photoelectron spectroscopy, TG: thermogravimetric, 3D: three-dimensional.
