One-pot solvothermal assembly of CeO2/Ce-BiOBr hollow microsphere heterojunctions for efficient degradation of Congo red driven by visible LED light irradiation

Enhancing the adsorption–photocatalytic efficiency of BiOBr for Congo red degradation by tuning the surface charge and bandgap via an Y3+–I− co-doping strategy

“…With a smaller absolute value of zeta potential | ζ | (a detailed discussion is provided in Section 3.4), the electrostatic repulsion of the former two kinds of flakes is weaker than the latter two, resulting in their comparatively serious agglomeration. Unlike BiOBr prepared in pure EG, which displays a hollow microsphere morphology nanosheet, 59 the nanoflakes prepared in the EG/water (1 : 1) mixture are randomly stacked. In their EDS spectra, besides those for C contamination (C Kα, 0.277 keV), radiations of Bi (Bi M, 2.44 keV), Br (Br Lα, 1.48 and Br Lβ, 1.53 keV) and O (O Kα, 0.525 keV) of the analogous relative intensity are distinct.…”