Synthesis of TiO₂/Bi₂MoO₆ Composite for Partial Oxidation of Aromatic Alkanes under Visible-Light Illumination

Abstract

Novel TiO 2 /Bi 2 MoO 6 heterostructures with TiO 2 particles loaded on a Bi 2 MoO 6 sheet were fabricated by a simple solvothermal process. A series of characterization techniques such as SEM, TEM, XRD, XPS, UV−vis DRS, and electrochemical impedance approach were used to study the physicochemical properties of the as-prepared materials. The TiO 2 /Bi 2 MoO 6 composites were used for partial oxidation of aromatic alkanes into benzaldehyde and its derivatives using O 2 as an oxidant under the irradiation of visible light. At a TiO 2 -to-Bi 2 MoO 6 molar ratio of 0.10, the composite exhibits excellent performance with benzaldehyde production rate being 1036.8 μmol•g −1 •h −1 . The outstanding performance is ascribed to enhanced separation of charge carriers by loading TiO 2 nanoparticles. The as-prepared composites are reusable photocatalysts for partial oxidation of aromatic alkanes under ambient conditions.

A Supported Bismuth Halide Perovskite Photocatalyst for Selective Aliphatic and Aromatic C–H Bond Activation

“…To date, several photocatalytic systems have been reported for aromatic oxidations . For example, CdS, Bi 2 WO 6 /BiOCl, and TiO 2 /Bi 2 MO 6 have activated benzylic C−H bonds under visible light illumination. Very recently, lead‐based perovskite NiO x /FAPbBr 3 /TiO 2 composite was reported to activate C−H bond under solar light irradiation; however, the production rate dropped tenfold when only visible light was used as light source .…”

Morphology Modulated Photocatalytic Activity of CeO2 Nanostructures for Selective Oxidation of Biobased Alpha‐Pinene to Oxygenates

“…This confirmed the photocatalytic activity effect of CeO 2 semiconductor oxide with tuneable NRs morphology for the oxidation of pinene to oxygenated compounds. The obtained photocatalytic activity of CeO 2 nanostructures for oxyfunctionalization of the pinene inert CÀ H bond is comparable to the other multicomponents catalysts such as Zn 2 Tilayered double hydroxide, [44] heterojunction CdWO 4 /Bi 2 WO 6 , [45] TiO 2 /Bi 2 MoO 6 , [46] CuO/Bi 2 MoO 6 , [47] and bimetallic AuÀ Pd/g-C 3 N 4 [48] reported previously in the activitation of aromatic hydrocarbons CÀ H for the selective introduction of oxygen molecule.…”

One‐Step Solvothermal Synthesis of BiPO4/Bi2MoO6 Heterostructure with Oxygen Vacancies and Z‐Scheme System for Enhanced Photocatalytic Performance

“…The peak at 132.6 eV (Figure d) can be indexed to P 5+ of the PO 4 3− . Figure e shows the three typical peaks at 530.3, 532.4 and 535.0 eV, which can be ascribed to the lattice O in BiPO 4 , the lattice O in Bi 2 MoO 6 and the surface‐adsorbed O species, respectively. The existence of oxygen vacancies in BMoP‐1‐3 catalyst was also proved by the EPR result (Figure S4).…”