Background: A molybdenum sulfide (Mo3S4) nanorod photocatalyst was
synthesised through the facile hydrothermal method and applied in the degradation of
Rhodamine B and Methyl Blue dyes under visible light irradiation.
Method: The Mo3s4 nanorod was synthesised using sodium molybdate, sodiumdiethyldithiolcarbonate
and ethylenediaminetetraacetic acid as molybdenum and sulfur sources,
and capping agent respectively. The photocatalyst was characterized by using XRD, FTIR,
TEM, SEM, EDS and UV-Vis spectroscopies.
Results: SEM result shows that the synthesised sample has a rod-like shape made up of
several thin sheets. The XRD result revealed the Mo3S4 nanorod to exist in the
Rhombohedral phase. The energy band gap of the sample was calculated to be 2.02 eV. The
synthesised Mo3S4 nanorod showed great potential in the removal of both RhB and MB in
aqueous solution. 85.46% and 99.78% removals of RhB and MB dyes respectively were
achieved in 90 min.
Conclusion: It was also observed that the photodegradation of both RhB and MB follows
pseudo-first order kinetics, with apparent rate constants of 0.0089 min-1 and 0.0118 min-1 for
RhB and MB respectively.