1：Experimental Design and Method Selection:

The study involved synthesizing ZIF-8 and incorporating Al3+ in situ to form ZnO/Zn6Al2O9/Al2O3 nanocomposites, followed by calcination. Various characterization techniques (XRD, SEM, TEM, HRTEM, XPS, UV-Vis DRS, BET, PL) were used to analyze the materials. Photocatalytic activity was evaluated by degrading Methyl Orange (MO) under simulated sunlight irradiation.

2：Sample Selection and Data Sources:

Samples were prepared with different molar ratios of Al/Zn (0, 1, 2). MO solutions of varying concentrations (20-200 mg/L) were used for degradation tests.

3：2). MO solutions of varying concentrations (20-200 mg/L) were used for degradation tests. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Chemicals included Zn(NO3)2·6H2O, Al(NO3)3·9H2O, 2-methylimidazole, ammonium hydroxide, anhydrous ethanol, Methyl Orange. Equipment included X-ray diffractometer (Bruker D8 Advance), SEM (Nova Nano230), TEM and HRTEM (JEOL JEM 2010F), XPS (ESCALAB 250Xi), UV-Vis spectrophotometer (UV-2550, Shimadzu), PL spectrometer (Zolix), BET analyzer (ST-08), photocatalytic reactor (Beijing Aulight Lighting Co., Ltd.), xenon lamp (300 W), optical radiometer (ST-85), UV spectrophotometer (UV-2600, Shimadzu).

4：Experimental Procedures and Operational Workflow:

ZIF-8 was synthesized by mixing zinc nitrate and Hmim solutions, aging for 24 hours, centrifuging, washing, and drying. ZnO nanocomposites were obtained by calcination at 500°C for 3 hours. Photocatalytic tests involved dispersing catalyst in MO solution, stirring in dark for 30 minutes for equilibrium, then irradiating with simulated sunlight while stirring, and measuring MO concentration over time.

5：Data Analysis Methods:

Degradation rate was calculated as C/C0. Data were analyzed using standard techniques for XRD, SEM, TEM, XPS, UV-Vis, BET, and PL. Statistical error was within ±5% for photocatalytic measurements.