surface-sensitized
TiO2 by MoS2 was employed with respect to MO
degradation in an aqueous media under UV–vis light (365 nm).
The entire degradation experiment was conducted at room temperature
using a high-pressure mercury lamp (250 W, Philips HPL–N).
Initially, to achieve adsorption–desorption equilibrium, the
photocatalyst (0.5 g/dm3) was dispersed in the MO solution
(100 mL, 20 mg L–1) with constant stirring for 30
min in the dark. Then, 3 mL of suspension was taken out after a considered
time interval. At the same time, water continuously passed through
the outer jacket of the reactor to maintain the temperature. A UV–vis–NIR
spectrophotometer (UV–3600, Shimadzu) was used to acquire absorbance
spectra to evaluate the degradation processes of MO on account of
alter absorbance of the particular absorption peak at 465 nm. The
photodegradation efficiency (η %) was calculated through the
following
and absorbance after photodegradation of MO at particular time intervals,
respectively.