Hydrothermal Synthesis of g‐C3N4/NiFe2O4 Nanocomposite and Its Enhanced Photocatalytic Activity. (23rd May 2019)

• Record Type: Journal Article
• Authors: Gebreslassie, Gebrehiwot; Bharali, Pankaj; Chandra, Umesh; Sergawie, Assefa; Baruah, Purna K.; Das, Manash R.; Alemayehu, Esayas
• Is Part Of: Applied organometallic chemistry. Volume 33:Number 8(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-23
• Subjects: dye degradation -- g‐C3N4/NiFe2O4 nanocomposite -- magnetic photocatalyst -- Z‐scheme; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.5002
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract : Herein, for the first time, a direct Z‐scheme g‐C3 N4 /NiFe2 O4 nanocomposite photocatalyst was prepared using facile one‐pot hydrothermal method and characterized using XRD, FT‐IR, DRS, PL, SEM, EDS, TEM, HRTEM, XPS, BET and VSM characterized techniques. The result reveals that the NiFe2 O4 nanoparticles are loaded on the g‐C3 N4 sheets successfully. The photocatalytic activities of the as‐prepared photocatalysts were evaluated for the degradation of methyl orange (MO) under visible light irradiation. It was shown that the photocatalytic activity of the g‐C3 N4 /NiFe2 O4 nanocomposite is about 4.4 and 3 times higher than those of the pristine NiFe2 O4 and g‐C3 N4 respectively. The enhanced photocatalytic activity could be ascribed to the formation of g‐C3 N4 /NiFe2 O4 direct Z‐scheme photocatalyst, which results in efficient space separation of photogenerated charge carriers. More importantly, the as‐prepared Z‐scheme photocatalyst can be recoverable easily from the solution by an external magnetic field and it shows almost the same activity for three consecutive cycles. Considering the simplicity of preparation method, this work will provide new insights into the design of high‐performance magnetic Z‐scheme photocatalysts for organic contaminate removal. Abstract : g‐C3 N4 /NiFe2 O4 nanocomposite was synthesized by a one‐pot hydrothermal Method. g‐C3 N4 /NiFe2 O4 shows the best activity in degradation of MO under visible light. The activity is 3 times higher than pure g‐C3 N4 photocatalyst. Plausible direct Z‐scheme mechanism photocatalytic system was discussed in detail. The nanocomposite photocatalyst can be easily separated by a magnet and shows superb stability.