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Fig. 8. (a) Photodegradation of TTCH over different samples under visible light (catalyst dosage is 30 mg); (b) Cu : Ti = 1 : 8 Cu2O@TiOF2/TiO2 degraded TTCH under different conditions; (c) UV-vis absorption spectrum of Cu : Ti = 1 : 8 Cu2O@TiOF2/TiO2.