Kumar, K V Ashok and L, Chandana and Ghosal, P and Ch, Subrahmanyam
(2017)
Simultaneous photocatalytic degradation of p -
cresol and Cr (VI) by metal oxides supported
reduced graphene oxide.
Molecular Catalysis.
pp. 1-7.
(In Press)
Full text not available from this repository.
(
Request a copy)
Abstract
The visible light active photocatalysts WO3 (C1), Fe2O3 (C2), WO3/rGO (C3), Fe2O3/rGO (C4) were synthesized
under in-situ hydrothermal method. The physico-chemical characteristics were studied and
characterized by XRD, Raman, UV–vis-DRS, TEM, SEM, BET, EDX and XPS. The formation of WO3 and
Fe2O3 was confirmed by XRD and the average crystallite size of the prepared samples was less than
50 nm. The Raman spectroscopy confirms the decreasing ID/IG ratio of WO3/rGO composite than the pure
rGO. The band gap calculated by UV–vis diffuse reflectance spectroscopy was found to be lower for the
composites C3 and C4 than C1 and C2. The TEM results confirmed that the WO3 nanoplates are uniformly
distributed on rGO sheets and no significant lattice distortion was observed on growing WO3 nanoplates
on rGO. The chemical composition and oxidation states of synthesized nanocomposites (C3 and C4) can
be characterized by X-ray Photoelectron Spectroscopy. The surface area of photocatalyst C3 was found to
be 16 m2/g. The visible light activity of prepared photocatalysts was tested for the degradation of p-cresol
and the reduction of Cr (VI). Typical results highlighted that WO3/r-GO (C3) is the best active catalyst and
the simultaneous degradation of the pollutants is beneficial over the removal of individual pollutants.
The mineralization of the organic pollutant was confirmed by the TOC analyzer and the percentage of
mineralization for the best active photocatalyst was
∼80%.
Actions (login required)
 |
View Item |
Altmetric
Altmetric