Catalytic and Photocatalytic Degradation Activities of Nanoscale Mn-Doped ZnCr₂O₄

Figure 4

Degradation curves of methylene blue with (a) pristine ZnCr₂O₄ and (b–d) Zn_1 − xMn_xCr₂O₄ (x = 0.01 to 0.03).