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TG and DTG curves of (A) CTAB, (B) SiO2NPs, (C) SiO2NPs + AO8 (Ci = 50 mg L–1), (D) SiO2NPs + AO8 (Ci = 100 mg L–1), (E) SiO2NPs + AO8 (Ci = 150 mg L–1), (F) SiO2NPs + AO8 (Ci = 200 mg –1), (G) SiO2NPs + AO8 (Ci = 400 mg L–1), and (H) AO8 dye. The measures were performed under an oxygen atmosphere.
