Synthesis and characterization of TUD-C impregnated with zinc oxide

Fatimatuszahra' Bte Sha'ri @ Shangari, Lee Siew Ling

Abstract


Technische Universiteit Delft-Crystalline (TUD-C) is a zeolite composite with ZSM-5 nanocrystals embedded in a mesoporous matrix. TUD-C and TUD-C doped with zinc oxide were successfully synthesized using sol-gel and impregnation methods. A series of TUD-C impregnated with zinc oxide were synthesized via sol-gel method using zinc acetate dehydrate (Zn(CH3COO)2.2H2O) as a zinc precursor and distilled water was used as solvent. The synthesized TUD-C and TUD-C doped with zinc oxide were characterized by using Nitrogen adsorption-desorption analysis, Fourier transform infrared spectrometer, Diffuse reflectance ultra violet-visible spectrophotometer, X-ray diffraction and Field Emission Scanning Electron Microscopy. From Nitrogen adsorption-desorption analysis, it was confirmed that TUD-C and all the TUD-C doped with zinc oxide samples have hierarchical mesoporous texture with high surface area which is 208.54 m2/g for TUD-C and lesser for TUD-C doped with zinc oxide. The interpretation of Fourier transform infrared spectrometer analysis showed siloxane and hydroxyl (water) functional groups in all synthesized samples, indicating framework stretching vibration band of Si(Al)-O in tetrahedral Si(Al)O4 in the TUD-C and H-bonded zeolitic water. Diffuse reflectance ultra violet-visible spectrophotometer analysis showed low values of bandgap for zinc oxide supported on TUD-C. The X-ray diffraction confirmed MFI framework of TUD-C in the samples. Field Emission Scanning Electron Microscopy showed the agglomeration formed in the samples. From the synthesized material, there are possible applications of TUD-C impregnated with zinc oxide such as used as photocatalyst and improved electrical properties material.


Keywords


TUD-C, zinc oxide, mesoporous, sol-gel method, characterization

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