MOF assisted synthesis of a Ho2O3/CNT nanocomposite photocatalyst for organic pollutants degradation |
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| Affiliation: | 1. Department of Physics, Osmania University, Hyderabad, 500 007, Telangana, India;2. Department of Physics, Sreenidhi Institute of Science and Technology, JNT University, Hyderabad, 501 301, India;1. LabSIPE, Ecole Nationale des Sciences Appliquées, Université Chouaib Doukkali d''El Jadida, El Jadida, Plateau 24002, Morocco;2. LPMMAT,Université Hassan II-Casablanca, Faculté des Sciences Ain Chock, BP 5366 Mâarif – Casablanca, Morocco;3. Institut Néel, CNRS, Université Grenoble Alpes, 25 rue des Martyrs, BP 166, 38042 Grenoble cedex 9, France;1. Department of Physics, Chungbuk National University, Cheongju 28644, Chungbuk, South Korea;2. Research Institute for Nanoscale Science and Technology, Chungbuk National University, Cheongju 28644, Chungbuk, South Korea;3. Department of Physics, UNIST, Ulsan 44919, South Korea;4. Functional Materials Department, Korea Institute of Materials Science, Changwon 51508, South Korea |
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| Abstract: | In this work, a holmium oxide (Ho2O3/CNT) photocatalysts were successfully synthesized through a MOF assisted route for the first time. The effects of the morphology and purity on the photocatalytic behavior of the products, were investigated by determining various physicochemical properties. The Ho2O3/CNT nanocomposite was systematically analyzed by powder X-ray diffraction (P-XRD), transmission electron microscopy (TEM), ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy studies. The Ho2O3 derived from a MOF assisted synthetic route using Ho(NO3)3·5H2O and terephthalic acid with a 1:1 M ratio at a temperature of 750 °C for 3 h prove the most advantageous, 98% degradation of 20 mg/L aqueous tetracycline pollutant was observed within 60 min. The elevated photocatalytic activity was mainly attributable to the unique synthetic route, improved crystallinity, wide UV-light absorption rate and excellent adsorption capabilities of CNT, as well as enhanced oxygen deficiency. The photocatalytic results confirm that the Ho2O3/CNT nanocomposite is an efficient photocatalyst for the degradation of toxic tetracycline pollutant and is thus suitable for use in environmental remediation. |
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| Keywords: | Ceramics Holmium oxide Photocatalyst Organic pollutants |
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