Open AccessPhotocatalytic upgrading α-Fe2O3 nanoparticles by incorporating MoS2/rGO nanosheets
Author(s) -
M. Behtaj Lejbini,
P. Sangpour,
Fariba Tajabadi,
Alireza Kolahi
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab8c93
Subject(s) - nanocomposite , materials science , photocatalysis , nanoparticle , charge carrier , hematite , hydrothermal circulation , band gap , chemical engineering , fourier transform infrared spectroscopy , absorption (acoustics) , degradation (telecommunications) , nanotechnology , nuclear chemistry , composite material , chemistry , catalysis , metallurgy , optoelectronics , organic chemistry , telecommunications , computer science , engineering
α -Fe 2 O 3 /MoS 2 /rGO nanocomposites was prepared by a two-step hydrothermal method and characterized by XRD, FESEM, EDS, FTIR, and UV–vis absorption spectroscopy. The results confirmed the formation of α -Fe 2 O 3 /MoS 2 -rGO (10 wt%) nanocomposites were composed of hematite nanoparticles with particle size of 30 nm and MoS 2 /rGO composite nanosheets with maximum sheet thickness of ∼ 10 nm. Upon addition of MoS 2 -rGO (8.0 wt%) nanosheets, the band gap of α -Fe 2 O 3 nanoparticles decreased from 2.3 to 1.7 eV that was accompanied by light absorption enhancement. Owing to synergetic effect between rGO and MoS 2 nanosheets leading to suppression of charge carrier recombination, prolongation of charge carrier lifetime, improvement of the interfacial charge transfer and increase in the number of active sites in α -Fe 2 O 3 nanoparticles, as-synthesized α -Fe 2 O 3 /MoS 2 -rGO (10 wt%) nanocomposites nanocomposite showed highly enhanced photocatalytic performance for Rh B degradation under light irradiation so that complete degradation of Rh B organic dye was achieved within 30 min.