Figure 3. A correlation appeared to exist between pH and temperature for the photocatalytic degradation of Congo red using zinc oxide at an elevated temperature. Figure A shows the correlation observed in the presence of catalyst and irradiation. Figure B shows the lack of correlation observed in the presence of catalyst with no irradiation

From

A Brief Note on the Temperature-Dependent Photocatalytic Degradation of Congo Red Using Zinc Oxide

Jacob White, Whitney Smith

American Journal of Water Resources. 2013, 1(4), 66-69 doi:10.12691/ajwr-1-4-2