Notice of RetractionPhotocatalytic Properties of Titanium Dioxide Loaded on ZSM-5 Zeolites Modified by NaOH and NH4Cl

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NaZSM-5 zeolites were modified by NaOH and NH₄Cl, and then TiO₂ catalysts were deposited on the zeolites by a sol-gel method. The photocatalytic activities of TiO₂/OH-ZSM-5, TiO₂/NH₄-ZSM-5 and pure TiO₂ were compared. The effects of NaOH and NH₄Cl modification on photocatalytic activity of anatase TiO₂ were investigated. Photocatalytic activities of the supported catalysts were examined through methyl orange degradation under UV irradiation. The results showed that the photocatalytic activity of NaZSM-5 zeolite modified by NaOH was reduced, while that of NaZSM-5 zeolite modified by NH₄Cl was enhanced. The optimum TiO₂ loading ratio of TiO₂/NH₄-ZSM-5 was 60 wt%. NH₄-ZSM-5´s adsorption capacity of water was higher than the adsorption capacity of methyl orange.