A hierarchical Nb2O5@NiFe-MMO rod array, fabricated and used as a structured photocatalyst. Issue 11 (20th February 2019)

• Record Type: Journal Article
• Authors: Liu, Fei; Wang, Yuwei; Kong, Xianggui; Lei, Deqiang; Zhang, Fazhi; Lei, Xiaodong
• Is Part Of: RSC advances. Volume 9:Issue 11(2019)
• Page Start: 6177
• Page End: 6183
• Publication Date: 2019-02-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra10432h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The work provides a new strategy to the exploration of excellent structured photocatalysts based on transition metal oxide materials for selective aerobic oxidation of benzylamine to imine. Abstract : Recently, using sunlight as a driving force with transitional metal oxides as photocatalysts, due to their unique optical and catalytic properties for organic reactions, has been considered to be a promising strategy in synthetic chemistry. Here, a hierarchically structured photocatalyst, a NiFe mixed metal oxide coated Nb2 O5 (denoted as Nb2 O5 @NiFe-MMO) rod array has been successfully fabricated using Nb foil as a substrate. The Nb2 O5 rod array was synthesized by the oxidative etching of Nb metal on the surface of the a substrate. The coating NiFe-MMO was obtained by the calcination of a NiFe layered double hydroxide (NiFe-LDH) precursor via the in situ epitaxial growing technique. The Nb2 O5 @NiFe-MMO rod array extended the photoresponse light region from ultraviolet light around 400 nm to visible light around 600 nm. With the well-designed architecture and highly dispersed NiO and Fe2 O3, the as-prepared photocatalyst exhibited excellent activity and recyclability toward the reaction of aerobic coupling under relatively green conditions, with catalytic efficiency of 228 μmol cm −2 (the area is that of the Ni foil substrate) at 30 °C for 5 h. The present work provides a new strategy for the exploration of excellent structured photocatalysts based on transition metal oxide materials for selective aerobic oxidation of benzylamine to imine.