The design of an innovative experiment on the photocatalytic degradation of organic dyes in water

Rhodamine B (RhB) is a widely used organic dye, and its industrial wastewater is difficult to degrade and potentially toxic. To address the degradation of RhB, an innovative experiment on the photocatalytic degradation of organic dye RhB in water was designed for experimental teaching in this study. The experiment employed g-C₃N₄ as the catalyst and utilized photocatalytic technology to degrade and remove RhB. It investigated how to plot the standard calibration curve of RhB solution and examined the influence of different reaction times on the degradation efficiency of RhB, ultimately obtaining experimental results on the photocatalytic removal of RhB. The photocatalytic degradation efficiency of RhB reaches 92.77% under a 300 W Xe lamp with a light intensity of 150 mW/cm². This innovative experiment incorporates the determination of the RhB standard calibration curve and the performance evaluation of photocatalytic RhB degradation as key teaching components. The implementation of the experiment deepened students' understanding of pollutant degradation theories, integrated cutting-edge photocatalytic technology, and enhanced their practical research and problem-solving skills.