Fe (III)‐grafted Bi₂MoO₆ nanoplates for enhanced photocatalytic activities on tetracycline degradation and HMF oxidation

Abstract

Fe (III)-grafted Bi 2 MoO 6 nanoplates (Fe (III)/BMO) with varying small quantity of Fe (III) clusters modification were fabricated through a simple hydrothermal and impregnation process. The characterization results indicate that the modification of Fe (III) clusters on the surface of Bi 2 MoO 6 nanoplates with intimate interfacial contact is beneficial to the expansion of visible light absorption range and the separation of photoinduced carriers during the interface charge transfer process. The photocatalytic properties of the samples were studied by degradation of tetracycline (TC) and selective aerobic oxidation of biomass-derived chemical 5-hydroxymethylfuraldehyde (HMF) under visible light. The 1.5 wt% Fe (III) clusters-grafted Bi 2 MoO 6 nanoplates exhibited optimum photocatalytic activity, which is the TC degradation kinetic rate constant is 5.3 times higher than that of bare BMO, and the highest HMF conversion of 32.62% can be obtained with a selectivity of 95.30%. Furthermore, a possible visible light photocatalysis mechanism over Fe (III)/BMO sample has been proposed. This study may supply some insight for the development of visiblelight-driven Bi 2 MoO 6 -based photocatalysts applicable to both environmental remediation and biomass-derived chemical transformation.

Innovative Protocols in the Catalytic Oxidation of 5‐Hydroxymethylfurfural

“…Fe III ‐grafted Bi 2 MoO 6 nanoplates were fabricated by hydrothermal and impregnation process [63] and upon deployment in aerobic oxidation of HMF, the best performance was more than 95 % selectivity for DFF with O 2 as the oxidant at room temperature under visible light irradiation. The improved separation efficiency of photoinduced charges as well as the more efficient utilization of visible light may explain the photocatalytic performances.…”

Recent Advances in Photocatalytic Oxidation of 5‐Hydroxymethylfurfural

“…Recently, Wang and co-workers synthesized Fe(III) grafted Bi 2 MoO 6 nanosheets (Fe(III)/BMO), in which the Fe(III) clusters could promote the photo-generated charge separation (Figure 2). [25] Selectivity of 95.3 % towards DFF formation at 32.6 % of HMF conversion was obtained when 1.5 wt % Fe (III) clustersgrafted on Bi 2 MoO 6 nanoplates was used as photocatalyst, showing the highest selectivity among the photocatalyst systems for HMF conversion into DFF in aqueous medium with O 2 as oxidant.…”

Recent Approaches in the Catalytic Transformation of Biomass‐Derived 5‐Hydroxymethylfurfural into 2,5‐Diformylfuran

“…It was believed that the interfacial charge transfer process between Fe III clusters and Bi 2 MoO 6 improved the separation of photoinduced charges to provide good performance for the selective oxidation of HMF to DFF under light irradiation. [88] Ma et al developed bimetallic AuÀ Ru immobilized graphene oxide as a suitable catalyst for the synthesis of DFF from HMF with 90.9 % yield. AuÀ Ru grafted onto the surface of graphene oxide provided higher adsorption of O 2 , HMF, and DFF than reduced graphene oxide (rGO) did, presumably due to the synergistic effect between Au and Ru.…”