3.5 BET surface areas and pore size distributions
The calculation results of Brunauer-Emmett-Teller (BET) specific surface
area (SBET) and average pore size and pore volume of
pure MCS, NiSe2 and MCNS-10 samples by
N2 adsorption-desorption isotherms at 77 K as shownFig. 5 and Table 1 . As shown inFig. 5 , the all samples
exhibited IV type isotherms with H3 hysteresis loops, indicating that
they had mesoporous structure [42]. The
SBETwas augmented from 12 to 15 m2 g-1after loading MCS onto surface of NiSe2, this was
because the cubic
NiSe2 provide enough space for anchoring of MCS
nanoparticles, which effectively prevent the occurrence of
agglomeration. In addition, the increased surface area of composite
catalyst MCNS-10 exposing more
activity sites, which enhancing photocatalytic hydrogen evolution
performance [43]. In short, the change of SBET of
MCNS-10 was consistent with the alter in morphology for MCNS-10
composite in TEM images.