Catalytic and Photocatalytic Degradation Activities of Nanoscale Mn-Doped ZnCr₂O₄

Table 2

Catalytic activity of pristine ZnCr₂O₄ and Zn_1−xMn_xCr₂O₄ (x = 0.01 to 0.03) catalysts in the presence of H₂O₂ oxidant for benzyl alcohol to benzaldehyde oxidation.

Catalyst	Oxidant	Yield (%)
Without catalyst	Without oxidant	03.90
With catalyst	Without oxidant	06.78
Without catalyst	With oxidant	22.93
ZnCr2O4	H2O2	44.50
Zn0.99Mn0.01Cr2O4	H2O2	54.18
Zn0.98Mn0.02Cr2O4	H2O2	60.37
Zn0.97Mn0.03Cr2O4	H2O2	71.12

Reaction conditions: 0.5 g catalyst; 5 mmol toluene; 5 mmol acetonitrile; 5 mmol H₂O₂; reaction temperature (60°C); and reaction time (6 h).