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The photocatalytic oxidation of Rhodamine B(RhB) was studied using photocatalytic reactor filled with module of quartz tube. Module of quartz tube consisted of small quartz tube (inner diameter, 1.5 mm; outer diameter, 3 mm) bundle coated with powder TiO₂ and uncoated large quartz tube (inner diameter, 20 mm; outer diameter, 22 mm). Two 30 W germicidal lamp was used as the light source and the reactor volume was 0.5 l. The effects of parameters such as the coating materials and numbers, initial concentration, H₂O₂ dose and metal deposition (Ag, Pt and Fe) and simultaneous application of H₂O₂ and metal deposition. The results showed that the initial reaction constant of quartz module coated with powder TiO₂ was higher 1.4 time than that of the TiO₂ sol and optimum coating number is twice. In order to increase reaction rate, simultaneous application of photocatalytic and photo-fenton reaction using Fe coating and dose H₂O₂ dose increased reaction rate largely.
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