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Excellent photocatalytic reduction of nitroarenes to aminoarenes by BiVO 4 nanoparticles grafted on reduced graphene oxide (rGO/BiVO 4 )
Author(s) -
Azad Roya,
Bezaatpour Abolfazl,
Amiri Mandana,
Eskandari Habibollah,
Nouhi Sima,
Taffa Dereje H.,
Wark Michael,
Boukherroub Rabah,
Szunerits Sabine
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5059
Subject(s) - bismuth vanadate , photocatalysis , graphene , materials science , oxide , catalysis , x ray photoelectron spectroscopy , raman spectroscopy , dielectric spectroscopy , chemical engineering , nanocomposite , high resolution transmission electron microscopy , bismuth , nanoparticle , inorganic chemistry , nuclear chemistry , nanotechnology , electrochemistry , chemistry , organic chemistry , electrode , metallurgy , physics , optics , transmission electron microscopy , engineering
A novel heterogeneous composite material based on reduced graphene oxide (rGO) and bismuth vanadate (BiVO 4 ) was prepared and characterized by various techniques such as powder XRD, HRTEM, EADX, UV–Vis‐DRS, FT‐IR, Raman, BET and XPS analyses. The characterization results reveal that the rGO well decorated by BiVO 4 . The electrochemical impedance spectroscopy (EIS) shows the increasing of charge transfer of rGO/BiVO 4 in presence of light irradiation. In this research, the pure BiVO 4 and rGO/BiVO 4 composite have been explored for photocatalytic reduction of nitroarenes. Among the prepared nanocomposites, rGO loaded with 10% BiVO 4 catalyst (noted as rGO/BiVO 4 –10%) shows the best performance for the photo‐reduction of various nitroaromatic molecules to their corresponding amine compounds under visible‐light irradiation at room temperature. The catalyst exhibited in particular excellent photocatalytic activity for the conversion of 1,4‐dinitrobenzene to 4‐nitroanilline (100% conversion) in 20 min, 4‐chloronitrobenzene to 4‐chloroaniline and 2‐nitrophenol to 2‐aminophenol (100% conversion) in only 30 min. In addition, the conversion of 4‐bromonitrobenzene, 4‐iodonitrobenzene to their corresponding amine compounds (100% conversion) was achieved in 60 min. The catalyst was recovered for several times and reused without decreasing of its efficiency.