3.1. Catalyst characterization
Figure 1 The XRD optical spectrum of
Ag3PO4,
ZnCo2O4, 0.1
ZnCo2O4/Ag3PO4,
0.2
ZnCo2O4/Ag3PO4and 0.3
ZnCo2O4/Ag3PO4.
The XRD spectra of the prepared Ag3PO4,
ZnCo2O4, 0.1
ZnCo2O4/Ag3PO4,
0.2
ZnCo2O4/Ag3PO4,
and 0.3
ZnCo2O4/Ag3PO4catalysts are shown in Fig. 1. It can be seen from the figure that the
diffraction peaks located at 18.96°, 31.22°, 36.81°, 44.74°, 59.28°, and
65.15° in the XRD pattern of ZnCo2O4(JCPDS No. 23-1390) belong to the (111), (220), (210), (311), (400),
(511), and (440) crystal planes, indicating that
ZnCo2O4 was synthesized by the
microwave-assisted method. The characteristic diffraction peaks located
at 20.9°, 29.7°, 33.3°, 36.6°, 47.9°, 52.8°, 55.1°, 57.4°, 61.7°, and
72.0° in the XRD spectrum of Ag3PO4catalyst correspond to the (110), (200), (210), (211), (310), (222),
(320), (321), (400), and (421) crystallographic planes of
Ag3PO4, which are consistent with the
standard card of Ag3PO4 (JCPDS No.
70-0702). The characteristic diffraction peaks belonging to
ZnCo2O4 in the XRD pattern of
ZnCo2O4/Ag3PO4became more and more obvious with the increase in the amount of
ZnCo2O4, which indicated that the
ZnCo2O4 particles were successfully
loaded onto the surface of Ag3PO4 to
form the
ZnCo2O4/Ag3PO4composite catalyst.