at 35 °C for 2 h, the above suspensions became gradually brick-red.
At last, the brick-red product was collected, repeatedly washed
with deionized water, and then dried at 90 °C for 2 h. And the ZnO/
Cu2O CSNCs were achieved.
To compare the photocatalytic activities of ZnO and Cu2O before
and after combination, Cu2O was fabricated, following the
same solution procedure as ZnO/Cu2O CSNCs except no ZnO
nanorods.