| The preparation of organic/inorganic hybrid functional materials is an attractiveresearch field in last years. In this paper, titania and titania-supported Zn(â…¡)-porphyrinaerogels, and their films have been prepared by sol-gel method, and a series of factors toprepare films were studied.The structures and morphology of the titania and titania-supported Zn(â…¡)-porphyrinaerogels, and their films were characterized by UV/DRS, IR, TGA, XRD, SEM. The resultsindicated that these materials possess pretty chemical properties, thermal stability and goodcompatibility. In addition we also found that interface during organic and inorganic phasepossesses microcosmic-structure and Zn(â…¡)THPP increased the visible light absorbable rangeof TiO2 significantly and do not affect the growth of anatase phase (TiO2).The photocatalytic degradation of reactive brilliant red X-3B dye (15mg/L) at roomtemperature was studied as a probe reaction, a series factors for effects of degradation werestudied. The results indicated that three layers ZnTHPP/TiO2 film possesses higherphotocatalytic ability compared to bare TiO2 for the photodegradation of reactive brilliant redX-3B dye. The decoloration rate almost reach to 75.6% after reaction 4 hours. By comparisonwith high-pressure mercury lamp and natural sunlight, reactive brilliant red X-3B can bedecomposed rapidly under irradiation with natural sunlight. It is proved that theZnTHPP/TiO2 has a potential effective application in treating the wasted-water under naturalconditions. The metal free porphyrin did not show better beneficial influence on thephotoactivity. A tentative explanation of the beneficial effect due to the presence of theZn(â…¡)-porphyrins both on the initial reaction rate and on the mineralization process isprovided by taking into account intrinsic electronic and physico-chemical properties.However:TiO2/Zn(â…¡)-porphyrin was more efficient photocatalyst for reactive brilliant red X-3B.
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