Photocatalytic degradation of methyl orange by TiO2–SiO2–NiFe2O4 suspensions was investigated. Adsorption studies revealed photocatalytic degradation occurred mainly on the surface of the TiO2–SiO2–NiFe2O4. The disappearance of the compound followed the zero-order kinetics according to the Langmuir–Hinshelwood model and the rate constant was 0.0035 mg L−1 min−1. The rate constant depended on the amount of photocatalyst, initial pH, and the presence of additional scavengers. •OH radicals and h+ had important roles in the photocatalytic degradation of methyl orange by TiO2–SiO2–NiFe2O4.
Research on Chemical Intermediates – Springer Journals
Published: Dec 14, 2012
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