1：Experimental Design and Method Selection:

The study involved the synthesis of MnO2-amberlite through stirring at different times (6, 12, 18, 24, and 30 h) and its characterization using BET, FTIR, XRD, and SEM. The photocatalytic degradation of Alizarin red S was examined under UV light.

2：Sample Selection and Data Sources:

Alizarin red S was used as the model compound for degradation. MnO2 and amberlite IRA 400 (Cl) were used for the synthesis of MnO2-amberlite.

3：List of Experimental Equipment and Materials:

Equipment included a magnetic stirrer, oven, furnace, centrifuge, UV-visible spectrophotometer, FTIR spectrometer, XRD diffractometer, and SEM. Materials included MnO2, amberlite IRA 400 (Cl), and Alizarin red S.

4：Experimental Procedures and Operational Workflow:

The synthesis involved grinding amberlite, dissolving it in water, adding MnO2, stirring at different times, centrifuging, drying, and calcination. The photocatalytic degradation was carried out under UV light, and the degradation percentage was calculated.

5：Data Analysis Methods:

The degradation percentage was calculated using the formula provided. BET analysis was used to compute specific surface areas, and FTIR, XRD, and SEM were used for characterization.