1：Experimental Design and Method Selection:

The study involved the synthesis of highly ordered TiO2 nanorod arrays decorated with Ag-Ag2S QDs through hydrothermal treatment and in-situ vulcanization. The content of Ag2S QDs was controlled by varying the immersion time in a DMF solution containing sulfur.

2：Sample Selection and Data Sources:

Fluorine-doped tin oxide (FTO) conducting glasses were used as substrates. The samples were characterized using XRD, FE-SEM, HRTEM, XPS, UV-Vis absorption spectra, and PL spectra.

3：List of Experimental Equipment and Materials:

Equipment included X-ray diffractometer (XRD, MAC M18XHF), field emission scanning electron microscope (FE-SEM, Hitachi, S4800), high resolution transmission electron microscopy (HRTEM, Hitachi, JEM-2100), X-ray photoelectron spectroscopy (XPS, Thermo, ESCALAB250), UV-Vis spectrophotometer (Shimadzu, UV-2550), and fluorescence spectrophotometer (FL, Hitachi, F-4500). Materials included titanium butoxide (TBOT), silver nitrate (AgNO3), S powder, and DMF.

4：0). Materials included titanium butoxide (TBOT), silver nitrate (AgNO3), S powder, and DMF. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The TNR arrays were synthesized on FTO substrates, followed by deposition of Ag QDs through UV irradiation. The Ag/TNR arrays were then soaked in DMF solution containing S powder to form Ag2S QDs. The samples were characterized and tested for photoelectrochemical and photocatalytic properties.

5：Data Analysis Methods:

The photoelectrochemical performance was evaluated using an electrochemical workstation (CHI660D, Shanghai Chenhua Limited). Photocatalytic activity was assessed by the degradation of methyl orange (MO) solution under UV light.