2.3.1. Synthesis of the ZnCo2O4
A microwave-assisted synthesis method was used to synthesize
ZnCo2O4 particles. The specific
preparation process is as follows: 7.5 mmol of
Zn(NO3)2·6H2O, 15 mmol
of Co(NO3)3.6H2O, 60
mmol of CO(NH2)2 and 12 mmol of
NH4F were successively added to 100 ml of deionized
water, using a magnetic stirrer to stir for 30 minutes and ultrasound
for 30 minutes to completely dissolve the medicine and form a light pink
solution. Then transfer the mixed solution to a 300 ml
polytetrafluoroethylene reaction tank, assemble the reaction instrument,
and place it in the microwave device, heating at a rate of 8 °C/min and
microwave reaction at 130 °C for 30 min. When the reaction is complete,
the product temperature is brought to room temperature, and then the
drug is collected by centrifugation, filtration, and repeat washing with
deionized water, dried in the oven at 80 °C for 10 hours, and finally
calcined in the tubular muffle furnace at 350 °C for 2 hours at a
heating rate of 1 °C/min to obtain the product, which is collected for
standby.