3. Results and discussion
3.1 XRD analysis
Fig. 1 depicts the crystal structure and crystallinity of pure
MCS, NiSe2 and MCNS
composites
by XRD analysis. In Fig. 1a , seven distinct diffraction peaks
of pure MCS at 24.92o, 26.65o,
28.37o, 36.80o,
43.91o, 48.08o and
52.04o correspond to the crystal planes of (100),
(002), (101), (102), (110), (103) and (114) planes, respectively.
The
diffraction peaks of
NiSe2 was
corresponded to the cubic NiSe2 with the well matched
(200), (210), (211), (311), (023) and (321) crystal planes,
respectively.
The strong and sharp characteristic peaks of NiSe2suggested high crystallinity of NiSe2 synthesized by
hydrothermal method. No other peaks originating by impurities were
observed, in the XRD patterns of MCS and NiSe2 alone,
implying the successful preparation of MCS solid solution and
NiSe2. In theFig. 1b , the diffraction
peaks of composite catalyst were actually resembled to pure MCS,
indicating that adulteration with a little amount of
NiSe2 had not effected on the crystal phase of
MCS. Besides, the intensity of
diffraction peaks of NiSe2 gradually strengthened
with increased of
NiSe2, indicating the successfully fabricated of
composite catalyst.