1：Experimental Design and Method Selection:

The study involved three different approaches: simple calcination of raw zeolite ET4 sample, loading of raw zeolite ET4 sample with 20% TiO2 followed by calcination at 500 °C, and treatment of raw zeolite ET4 sample followed by loading with 20% TiO2 and calcination at 500 °C.

2：Sample Selection and Data Sources:

The natural zeolite sample ET4, a mixture of celadonite, ilmenite, and mordenite, was selected for its high content of Ti and Fe.

3：List of Experimental Equipment and Materials:

Equipment used included X-ray diffraction (XRD), inductively coupled plasma optical emission spectrometry (ICP-OES), scanning electron microscopes (Hitachi TM-100 and FEI NOVA NANO SEM 230), and UV-Vis diffuse reflectance spectroscopy (Varian Cary 5000). Materials included titanium butoxide, 2-propanol, water, methyl orange (MO), and various chemicals for sample treatment.

4：0). Materials included titanium butoxide, 2-propanol, water, methyl orange (MO), and various chemicals for sample treatment. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Samples were prepared through calcination, TiO2 loading, and treatment processes, followed by characterization and photocatalytic activity testing.

5：Data Analysis Methods:

Data were analyzed using XRD patterns, ICP-OES for chemical composition, SEM for morphology, and UV-Vis spectroscopy for optical properties.