1：Experimental Design and Method Selection:

The study combined hydrothermal and calcination technology to synthesize C-doped Bi2MoO6/ZnInAl-CLDH heterojunctions using cotton fiber as a biotemplate. The methodology included controlling morphology, phase composition, and in situ C-doping by adjusting processing parameters.

2：Sample Selection and Data Sources:

Absorbent cotton and doxycycline were used as primary materials. The synthesis involved the use of various chemical reagents including Zn(NO3)2·6H2O, InN3O9·xH2O, C9H21AlO3, NH4NO3, HNO3, Bi(NO3)3·5H2O, and Na2MoO4·2H2O.

3：2O. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included a Teflon-lined stainless-steel autoclave, XRD (Bruker D8-Advance), FESEM (QUANTA 400F), HRTEM (TecnaiF20), FTIR (Nicolet 6700), UV-Vis spectrometer (UV-3600), XPS (PHI1800), TOC analyzer (TOC-Vcph), and PL spectrometer (F-4500).

4：0). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The synthesis involved dissolving Bi(NO3)3·5H2O in HNO3, adding Na2MoO4·2H2O, adjusting pH, hydrothermal treatment, washing, drying, and calcination. The photocatalytic performance was evaluated by degrading doxycycline under simulated sunlight irradiation.

5：Data Analysis Methods:

The photocatalytic activity was assessed by monitoring the decrease in doxycycline absorbance. The morphology, phase composition, and pore structure were characterized using SEM, TEM, XRD, and BET surface area analysis.