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Combining Ag-MFI or Ag-GIS Zeolites with Nano TiO2 as Novel Photocatalysts for Significant Improvement of Ethylene Removal
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DOI：10.1007/s11244-026-02337-7.png)
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Abstract
En 中文
The removal of ethylene - a phytohormone that promotes fruit ripening after harvesting can prolong the ripening time of the fruit. In this study, the TiO2 photocatalyst was modified to increase the catalytic efficiency by mechanical mixing with two types of zeolites which underwent the silver ion exchange process. Various analytical techniques, including XRD, N2 adsorption-desorption, SEM-EDS, were employed to evaluate the crystal structure, textural characteristics, morphology, and elemental distribution of the materials. This investigation examined two distinct aluminosilicate molecular sieve materials: zeolite ZSM-5 and zeolite P, which exhibit a framework type denoted as MFI and GIS, respectively. The TiO2 – Ag/ZSM-5 and TiO2 – Ag/ZP samples, gives 3- and 4.5-times better efficiency, respectively, compared to the use of parent TiO2 P25. Furthermore, the study assessed the effect of different types of zeolites in the dispersion of TiO2 on a fixed surface of the material. In all experiments, zeolite P showed better catalytic support effect than zeolite ZSM-5. Besides, the study investigated factors related to reaction conditions in a continuous flow reactor. The research findings serve as fundamental data for the practical development of utilizing photocatalysts to prolong the shelf life of agricultural products.
Keywords:
Photocatalyst
Ethylene removal
Zeolite
Silver
Fruit ripening
Titanium dioxide
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