1：Experimental Design and Method Selection:

The study used electrospinning to prepare nanofibers containing different amounts of TiO2 nanoparticles (1 wt%, 5 wt%, and 10 wt%). The photocatalytic activities of these nanofibers were evaluated in a reactor for ethylene degradation. A banana fruit-ripening test was conducted to confirm the utility of the photocatalytic reaction.

2：Sample Selection and Data Sources:

Bananas were harvested at the green stage and sorted based on uniformity of color and size. All chemicals were of analytical reagent grade.

3：List of Experimental Equipment and Materials:

PAN (polyacrylonitrile), DMF (N,N-dimethyl formamide), TiO2 (titanium (IV) oxide, anatase powder), ethylene (99.995%), SEM (SUPRA55, ZEISS, Germany), TEM (HT7700, Hitachi, Japan), EDS (Oxford INCA 350, Abingdon, UK), XRD (D8 ADVANCE, Bruker, USA), GC (7900, Techcomp, China).

4：995%), SEM (SUPRA55, ZEISS, Germany), TEM (HT7700, Hitachi, Japan), EDS (Oxford INCA 350, Abingdon, UK), XRD (D8 ADVANCE, Bruker, USA), GC (7900, Techcomp, China). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Nanofibers were prepared by electrospinning TiO2/PAN/DMF solutions. The photocatalytic activities were evaluated by measuring the percentage of ethylene degradation in a reactor. A banana fruit-ripening test was conducted to observe the delay in ripening.

5：Data Analysis Methods:

The degradation of ethylene was calculated using a formula based on initial and final concentrations. The results were expressed as percentage of ethylene degradation.