Enhanced photoactivity and selectivity over BiOI-decorated Bi2WO6 microflower for selective oxidation of benzylamine: Role of BiOI and mechanism

Tuning the selectivity of benzylamine photo-oxidation with different rhodium modes anchored on BiOIO3

“…On the basis of the above experiments and our theoretical analysis, we propose the possible reaction mechanism over Rh 1 /BOIO and Rh NP /BOIO. 48–51 As shown in Fig. 4e, Rh 1 /BOIO is excited to generate electron–hole pairs during light irradiation.…”

Bismuth‐Based Oxide Photocatalysts for Selective Oxidation Transformations of Organic Compounds

“…A BiOI/Bi 2 WO 6 heterostructure was developed using the successive ionic layer adsorption and reaction (SILAR) method and used in the selective oxidation of benzylamine. [36] The composite showed a superior oxidation performance at 92% conversion, as compared to 30% and 68% conversion of BiOI and Bi 2 WO 6 , respectively. The performance was attributed to a combination of increasing light harvesting ability, favorable adsorption of the substrate, and enhanced charge separation.…”

“…By coupling a photocatalyst containing deep VB position with another semiconductor possessing shallow VB level, one can take advantage from charge transfer across the heterojunction to achieve mild oxidizing ability of VB hole, consequently reducing overoxidation of desired products. [36] With this modification method, charge carrier lifetime and light absorption range of photocatalysts can also be manipulated to improve both conversion and yield. [28] More specific details on selectivity control strategies for each Bi-based oxide are provided in section 3.…”

“…Another method often employed to boost selectivity in heterogeneous photocatalytic organic synthesis is heterojunction formation. By coupling a photocatalyst containing deep VB position with another semiconductor possessing shallow VB level, one can take advantage from charge transfer across the heterojunction to achieve mild oxidizing ability of VB hole, consequently reducing overoxidation of desired products [36] . With this modification method, charge carrier lifetime and light absorption range of photocatalysts can also be manipulated to improve both conversion and yield [28] .…”

Controlling the Photocatalytic Activity and Benzylamine Photooxidation Selectivity of Bi2WO6 via Ion Substitution: Effects of Electronegativity

“…Bi 2 WO 6 is a promising visible-light-driven photocatalyst with a band-gap energy of 2.6–2.9 eV. , Bi 2 WO 6 has been extensively investigated for many applications such as dye degradation, NO oxidation, CO 2 reduction, and amine selective oxidation. − Nevertheless, the photocatalytic efficiency of pristine Bi 2 WO 6 is limited by the low visible-light absorption and rapid recombination of photoexcited charge carriers. In addition, the conduction and valence band-edge potential of Bi 2 WO 6 are less negative and positive than the reduction potential of O 2 •– /O 2 and • OH/H 2 O, respectively, resulting in its poor ability to generate reactive oxidative species (ROS) under light irradiation and consequently low photocatalytic efficiency .…”