1 research outputs found
In-Situ Immobilization of H<sub>5</sub>PMo<sub>10</sub>V<sub>2</sub>O<sub>40</sub> on Protonated Graphitic Carbon Nitride under Hydrothermal Conditions: A Highly Efficient and Reusable Catalyst for Hydroxylation of Benzene
A novel
heterogeneous catalyst was prepared by in situ immobilization
of H<sub>5</sub>PMo<sub>10</sub>V<sub>2</sub>O<sub>40</sub> (PMo<sub>10</sub>V<sub>2</sub>) on protonated g-C<sub>3</sub>N<sub>4</sub> (pg-C<sub>3</sub>N<sub>4</sub>) under hydrothermal conditions. The
results of Ī¶ potential, PL, FT-IR, XRD, and XPS indicated that
PMo<sub>10</sub>V<sub>2</sub> was immobilized on the protonated CīøNī»C
of CN heterocycles. XPS and EPR confirmed the presence of V<sup>4+</sup> in the catalyst due to electronic interaction between PMo<sub>10</sub>V<sub>2</sub> and pg-C<sub>3</sub>N<sub>4</sub>. The textural and
morphology properties of the catalyst were characterized by N<sub>2</sub> adsorptionādesorption, SEM, and TEM. PMo<sub>10</sub>V<sub>2</sub>/pg-C<sub>3</sub>N<sub>4</sub> showed excellent catalytic
performance with 25.8% benzene conversion and 99.7% selectivity to
phenol in the hydroxylation of benzene to phenol. The excellent catalytic
performance of PMo<sub>10</sub>V<sub>2</sub>/pg-C<sub>3</sub>N<sub>4</sub> could be attributed to high dispersion of PMo<sub>10</sub>V<sub>2</sub> on pg-C<sub>3</sub>N<sub>4</sub>, the presence of V<sup>5+</sup>/V<sup>4+</sup> redox pairs, and the cooperative benzene-activation
capability of g-C<sub>3</sub>N<sub>4</sub>. The PMo<sub>10</sub>V<sub>2</sub>/pg-C<sub>3</sub>N<sub>4</sub> catalyst can be easily recycled
without loss of activity