Figure 2. SEM images of (a, b) ZMO; (c, d) ZMOP-4
As shown in Figure 3b-f , it is obvious that ZMOP-4
simultaneously contains the elements of Mn, O, N, and Zn, and they are
evenly dispersed. The uniform distribution of the N element proves the
successful addition of PPy.
To further determine the phase of PPy and ZMOP-x, XRD patterns of the
materials were tested and analyzed. In Figure 4a , XRD results
of ZMO and ZMOP-x nanowires show the diffraction peak corresponds to
that of the standard card α-MnO2 (JCPDS44-0141),
reflecting that the doping of a little bit of Zn2+won’t influence the original crystal structure of MnO2.
These several main identifying peaks at 12.8, 18.1, 26.8, 37.5, 41.9,
49.8, and 60.3° equivalent to points to the (110), (200), (310), (211),
(301), (411), and (521) crystalline planes of α-MnO2,
respectively.20-22 PPy sample has a distinct broad
peak at 25°, which corresponds to the (002) planes of graphite. Hence,
The XRD data indicates that the as-prepared PPy exhibits an amorphous
structure. In addition, due to the small content of PPy in the ZMOP-x
composite, the peak of PPy is not very obvious in the obtained XRD
pattern.