Photonic Activity for MB Solution of Metal Oxide/CNT Catalysts Derived from Different Organometallic Compounds

Abstract

Multi-walled carbon nanotube (MWCNT) supported chromium oxide (Cr₂O₃), magnesium oxide (MgO), vanadous oxide (V₂O₃) catalysts were prepared from MWCNT with different organometallic compounds chromium acetylacetonate {Cr(C₅H₇O₂)₃}, magnesium acetate tetrahydrate {Mg(CH₂COO)₂·4H₂O}, and vanadyl acetylacetonate {VO(C₅H₇O₂)₂}. The obtained catalysts were characterized by BET surface area, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray analysis (EDX). In addition, we used methylene blue (MB) in aqueous solution under condition of visible light irradiation to determine their photocatalytic degradation efficiency. In conclusion, the sample V₂O₃/CNT had excellent photocatalytic degradation for MB solution, which showed much higher photocatalytic degradation efficiency than samples Cr₂O₃/CNT and MgO/CNT.

Keywords:

• Metal oxide/CNT
• organometallic compounds
• TEM
• photocatalytic degradation