A Visible Light-Driven Zn/Cr-LaFeO₃ Nanocomposite with Enhanced Photocatalytic Activity towards H₂ Production and RhB Degradation

Abstract

We have studied the effect of Zn−Cr layered double hydroxide (LDH) on LafeO3. LaFeO3 (LFO) decorated Zn−Cr layered double hydroxide (LDHLFO) nanocomposites was successfully synthesized. As compare to the neat LFO and LDH, the LDHLFO shows enhanced absorption of visible light and improvement in electron‐hole separation efficiency. The X‐ray diffraction (XRD) peak of the LDH shifted slightly towards lower angle and merged with the LFO peak indicating increase in the basal plane spacing. Moreover, introduction of LDH to LaFeO3 shows higher photocurrent value than that of neat LFO and LDH exhibiting higher photocatalytic activity towards organic pollutant degradation and water reduction reaction under visible light irradiation. The LDHLFO nanocomposite showed about 3.8 and 4.1 times higher H2 evolution, 8.7 and 7.9 times higher Rhodamine B degradation than that of pure LaFeO3 and LDH respectively. The possible mechanism for both water reduction and dye degradation reaction was prudently examined by electron scavenger test.

Photocatalytic Activity of ZnV2O6/Reduced Graphene Oxide Nanocomposite: From Theory to Experiment

“…When ZnV 2 O 6 powders were inserted in the solution, the degradation of RhB increased to 48% after irradiation for 2 h. It indicates a comparative photocatalitic activity of ZnV 2 O 6 rather than many photocatalysts have been suggested for degradation of RhB before. [34][35][36] In addition, the introduction of rGO can considerably enhance the photocatalytic performance of ZnV 2 O 6 . Considering the pseudo-first-order model, the rate constant for ZnV 2 O 6 /rGO nanocomposite to remove RhB is about 13.9 × 10 −3 min −1 , which is 2.48 times larger than that of pristine ZnV 2 O 6 (Fig.…”

Perovskite Oxide Based Materials for Energy and Environment-Oriented Photocatalysis

“…In addition to this, the effect of doping, Gd 3+ -BiFeO 3 , and noble metal loading, Au-BiFeO 3 , has also been studied for H 2 production. In comparison to BiFeO 3 , LaFeO 3 based photocatalysts are more studied for water splitting due to its favorable negative CB potential. − Haung and co-workers have studied the effect of Au loading on LaFeO 3 toward photocatalytic water splitting . The reaction was carried out in the presence of Na 2 S and Na 2 SO 3 as H 2 evolving agent and AgNO 3 as O 2 evolving agent.…”

Recent Progress in LDH@Graphene and Analogous Heterostructures for Highly Active and Stable Photocatalytic and Photoelectrochemical Water Splitting

“…Normally, the class of two‐dimensional (2D) layered based heterostructure materials has been strongly apprised worldwide and there energy conversion and storage applications are also highly recommended as from the isolation of graphene in 2004 [51–54] . Layered solid materials with few layers or single‐layer or stacked layer structure, have been used in water splitting such as layered double hydroxide (LDH), [11–17,55,56] layered metal hydroxides, [57,58] and layered perovskites, [59] etc.…”