66
T. Rakitskaya et al.
(a)
(b)
(c)
(d)
Fig. 3 SEM images of surfaces of the OMS-2 samples. a OMS-2(SSt); b OMS-2(Ref); c OMS2(SG); d OMS-2(MS)
at 10000 and 2000 magnifications (Fig. 3k, l) clearly demonstrate single-crystal fiber
characteristic of cryptomelane that is typical for OMS-2 [37, 47].
3.4 Specific Surface Area and Porosity Measurements
Figure 4 shows the isotherms of nitrogen ad/desorption by the four OMS-2 samples.
Their profiles are similar and identical to type IV with H3-type hysteresis loops
indicating mesoporous structure of these samples.
T. Rakitskaya et al.
(a)
(b)
(c)
(d)
Fig. 3 SEM images of surfaces of the OMS-2 samples. a OMS-2(SSt); b OMS-2(Ref); c OMS2(SG); d OMS-2(MS)
at 10000 and 2000 magnifications (Fig. 3k, l) clearly demonstrate single-crystal fiber
characteristic of cryptomelane that is typical for OMS-2 [37, 47].
3.4 Specific Surface Area and Porosity Measurements
Figure 4 shows the isotherms of nitrogen ad/desorption by the four OMS-2 samples.
Their profiles are similar and identical to type IV with H3-type hysteresis loops
indicating mesoporous structure of these samples.