Heterogeneous Catalytic Ozonation of Acid blue 62 Over Nanorod Fe-OMS-2
Tran-Thuy, Tuyet-Mai
Lam, Hoa-Hung
Dang, Quoc-Tuan
Phan, Thuy-Sang
Truong-Pham, Duc-Nguyen
Nguyen, Dung Van
Dang-Bao, Trung
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Tran-Thuy T.-M., Lam H.-H., Dang Q.-T., Phan T.-S., Truong-Pham D.-N., Nguyen D.V., Dang-Bao T., 2020, Heterogeneous Catalytic Ozonation of Acid blue 62 Over Nanorod Fe-OMS-2, Chemical Engineering Transactions, 78, 385-390.
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In this work, nanorod materials prepared by refluxed method (K-OMS-2) and by co-precipitation method (Fe-OMS-2) were analyzed by X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). Non-catalytic and heterogeneous catalytic ozonation processes of acid blue 62 (AB-62) were tested under the bubbling O3/air flow, at room temperature (RT). Comparing to ozonation over Fe-OMS-2, both adsorption and non-catalytic ozonation of AB-62 showed much lower removal efficiency. These results evidenced a positive role of nanorod Fe-OMS-2 in removal of (80% of AB-62 after 50 min of O3 bubbling. The pseudo first-order reaction with respect to the AB-62 was observed from ozonation over K-OMS-2 and Fe-OMS-2 catalysts. The reaction rate measured from Fe-OMS-2 is three times faster than that from K-OMS-2 probably contributed from a synergistic effect between O3 and defects on the surface of Fe-OMS-2.
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