Fig. 3 BET-BJH analysis curve of PILs-XSS
3.1.3 SEM and EDS analysis
The structural characteristics and the surface morphology of the samples
were observed by SEM. The spherical PILs-XSS was ground for SEM
analysis, as shown in Figure 4, which shows the SEM picture of the
sample. We can see that PILs-XSS has a fluffy pore-like structure, which
is consistent with the high surface area (71.5m2/g)
and the mesoporous material (14.8nm), which well explains the special
advantages of the catalyst PILs-XSS in the reaction[32].
The samples were characterized and analyzed by EDS to study their
composition, distribution. The EDS analysis of the samples is shown in
Table 1. It can be seen from the table 1 that bromine was detected in
the catalyst PILs-XSS, which is important for the addition reaction of
CO2 and propylene oxide. For EDS detection, the results
are similar to the theoretical ratio. It was further proved that
PILs-XSS was synthesized successfully.
Table 1 EDS analysis of PILs-XSS