In summary, cuprous oxide and zinc oxide composites have
been immobilized on natural diatomite by two-step deposition.
The zinc oxide concentrations affect the photocatalytic activities
of the Cu2O–ZnO/diatomite composites. According to the UV–vis
DRS and Raman results, sample DZC-4 (ZnO:Cu2O= 4:2.5) exhibits
the optimal optical performance which corresponds to the visiblelight-
induced photocatalytic activity in the degradation of red
water. After illumination by visible light for 4 h, 72.8% of the red
water can be degraded by photocatalysis of sample DZC-4. In comparison,
in the first hour without light irradiation, 14.6% of the
red water is removed by adsorption. None of the organics but
1,3,5-trinitrobenzene in the remaining red water treated by photocatalysts
can be detected by GC/MS analysis, implying these
components were mostly degraded. The Cu2O–ZnO immobilized
on diatomite exhibits high photocatalytic activity and has potential
in the treatment of red water from TNT manufacturing.
In summary, cuprous oxide and zinc oxide composites havebeen immobilized on natural diatomite by two-step deposition.The zinc oxide concentrations affect the photocatalytic activitiesof the Cu2O–ZnO/diatomite composites. According to the UV–visDRS and Raman results, sample DZC-4 (ZnO:Cu2O= 4:2.5) exhibitsthe optimal optical performance which corresponds to the visiblelight-induced photocatalytic activity in the degradation of redwater. After illumination by visible light for 4 h, 72.8% of the redwater can be degraded by photocatalysis of sample DZC-4. In comparison,in the first hour without light irradiation, 14.6% of thered water is removed by adsorption. None of the organics but1,3,5-trinitrobenzene in the remaining red water treated by photocatalystscan be detected by GC/MS analysis, implying thesecomponents were mostly degraded. The Cu2O–ZnO immobilizedon diatomite exhibits high photocatalytic activity and has potentialin the treatment of red water from TNT manufacturing.
การแปล กรุณารอสักครู่..
