Fig. 2

a1 Schematic structure of KTO lattice, a2 Digital photographs of all catalysts, a3 Degradation curves and a4 The first-order reaction kinetics plot for degradation of MB under visible light irradiation, a5 Effects of different scavengers on the photocatalytic degradation of MB over Mn-KTO. a6 Fluorescence spectra of all catalyst suspensions in the TA solution for 120 min of irradiation time (λex = 320 nm). Reprinted from [35] with permission from Elsevier. Copyright (2022) Elsevier. a7 TEM images of KTO and Gd0075-KTO (insets show the corresponding SAED patterns). a8 The changes of temporal UV–Vis absorption spectra during the degradation of MB aqueous solution over KTO and a9 Gd0075-KTO, a10 Photocatalytic degradation profiles of MB as a function of the irradiation time under visible light over all catalysts and a11 pseudo-first-order kinetics for degradation of MB under visible light irradiation for 180 min