Abstract
TiO2/Al-MCM-41 composites with various titania content were prepared by loading titania into the mesopores of Al-MCM-41 mesoporous molecular sieve from coal-measure kaolin as silicon and aluminum source via general sol-gel method and incipient wetness impregnation method. TiO2/Al-MCM-41 composites were characterized by XRD, FT-IR and SEM, and the photocatalytic degradation of methyl orange solution under visible light irradiation. The results showed that the titania crystalline phase was anatase, and the particles size of TiO2 increase with TiO2 content. The photocatalytic degradation rates of all samples prepared by sol-gel method and incipient wetness impregnation have been become stable by visible light irradiation for 150 min, and the highest degradation rate was 83.7% and 76% respectively.
Highlights
Kaolin, relatively pure clay, has a wide variety of applications in industry, as paper mill wastewater, rubber filler, ceramic, organic matter intercalation material, adsorbent, catalyst, and cement [1,2,3,4,5,6]
We synthesized basic molecular sieve [9], 4A zeolites [7], 5A zeolites [10] and mesoporous material [8].Here we report the formation of TiO2/Al-MCM-41 composites using coal-measure kalin as starting materials and the photocatalytic degradation of methyl orange by these composites under visible light irradiation
TiO2/Al-MCM-41 composites with different ratios of TiO2 using coal-measure kaolin as starting materials were prepared at room temperature in ethanol solution by general sol-gel method and incipient wetness impregnation method
Summary
Relatively pure clay, has a wide variety of applications in industry, as paper mill wastewater, rubber filler, ceramic, organic matter intercalation material, adsorbent, catalyst, and cement [1,2,3,4,5,6]. In order to overcome the bottle-necks of commercials application of TiO2 nanoparticles, there are many work focused on the loading onto MCM-41 mesoporous materials of TiO2 nonpareils [23,24,25]. There is no study on the photocatalytic degradation of dyes by TiO2 loading on Al-MCM-41 mesoporous materials under visible light irradiation. We synthesized basic molecular sieve [9], 4A zeolites [7], 5A zeolites [10] and mesoporous material [8].Here we report the formation of TiO2/Al-MCM-41 composites using coal-measure kalin as starting materials and the photocatalytic degradation of methyl orange by these composites under visible light irradiation. It has been observed that the titania particles are loaded onto Al-MCM-41 mesoporous materials, which controls the particles size and narrows the band gap of titania
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