Fig. 6From: Preparation of ZnO Photocatalyst for the Efficient and Rapid Photocatalytic Degradation of Azo DyesEffect of initial concentration on the photodegradation activities of ZnO prepared with the complexation ratio of 4:1 and calcination temperature of 400 °C (10 min of irradiation time, 0.2 g/L ZnO, and pH = 6.8)Back to article page