Toward enhanced visible-light photocatalytic dye degradation and reusability of La3+ substituted ZnFe2O4 nanostructures

The present work focused on the synthesis of novel ZnLaxFe2−xO4 catalysts (x = 0, 0.01, 0.03, 0.05) and their utilization for the photocatalytic degradation of Rhodamine B dye. Structurally, the band gap energy of the catalysts tended to decrease (1.94–1.70 eV) with increasing the amount of La3+ dop...

Full description

Saved in:
Bibliographic Details
Published in:Environmental research 2022-11, Vol.214, p.114130-114130, Article 114130
Main Authors: Nguyen, Loan T.T., Nguyen, Hang T.T., Nguyen, Lan T.H., Duong, Anh T.T., Nguyen, Hai Q., Bui, Nguyen D., Ngo, Viet T.M., Nguyen, Duyen Thi Cam, Tran, Thuan Van
Format: Article
Language:English
Subjects:
Dye treatment
Photocatalytic activity
Reusability
Rhodamine B
ZnLaxFe2−xO4
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The present work focused on the synthesis of novel ZnLaxFe2−xO4 catalysts (x = 0, 0.01, 0.03, 0.05) and their utilization for the photocatalytic degradation of Rhodamine B dye. Structurally, the band gap energy of the catalysts tended to decrease (1.94–1.70 eV) with increasing the amount of La3+ dopant. ZnLa0.05Fe1.95O4 had an average particle size (40 nm), high surface area (41.07 m2 g−1) and large pore volume (0.186 cm3 g−1). Moreover, the effect of doping ratio, reaction time, H2O2 concentration, catalyst loading on the treatment performance of La3+ substituted ZnFe2O4 nanocomposites was investigated. ZnLa0.05Fe1.95O4/H2O2 system exhibited the highest degradation efficiency of 99.5% and nonlinear pseudo first-order kinetic reaction rate (14.8 × 10−3 min−1) in the presence of visible light irradiation. The key role of reactive oxygen species involving •O2− and •OH radicals was well explained through the scavenger study. A plausible mechanism of the degradation of Rhodamine B dye was also proposed. Due to two advantageous points including high recyclability (up to 4 cycles) and stability, La3+ substituted ZnFe2O4 nanocomposites can be an effective and competitive catalyst for the visible light-driven photodegradation of toxic dyes in the real wastewaters. •Facile synthesis of ZnFe2O4 nanocomposites with La3+ dopant (0–5%) was conducted.•Photocatalytic enhancement of ZnLaxFe2−xO4 was respect to pristine ZnFe2O4.•ZnLa0.05Fe1.95O4/H2O2 system obtained the highest photocatalytic efficiency of 99.5%.•The role of reactive oxygen species involving •O2− and •OH radicals was suggested
ISSN:0013-9351
1096-0953
DOI:10.1016/j.envres.2022.114130