1：Experimental Design and Method Selection

The study involved the synthesis of luminescent cellulose fibers modified with lanthanide(III)-doped nanoparticles via the Lyocell process, which includes dissolving cellulose in N-methylmorpholine-N-oxide (NMMO) and spinning the fibers using a dry-wet method.

2：Sample Selection and Data Sources

Cellulose pulp with an average polymerization degree of 1250 and 50% aqueous solution of NMMO were used. The modifiers were CeF3:5% Tb3+, CePO4:5% Tb3+, and LaF3:10% Ce3+, 30% Gd3+, 1% Eu3+ NPs.

3：List of Experimental Equipment and Materials

IKAVISC kneader type MKD 0.6-H60 for preparing cellulose solution, laboratory-scale piston-spinning device for fiber formation, Bruker AXS D8 Advance diffractometer for XRD, Hitachi HT7700 microscope for TEM, Malvern Zetasizer Nano-ZS for DLS and ELS measurements, FEI Quanta 250 FEG SEM for morphology and element distribution analysis, Hitachi F-7000 spectrofluorometer for luminescence measurements, Zwick Z2.5/TN1S tensile testing machine for mechanical properties.

4：Experimental Procedures and Operational Workflow

The process included synthesis of nanomodifiers, preparation of spinning dope, fiber spinning, and characterization of the fibers' structural, morphological, and luminescent properties.

5：Data Analysis Methods

XRD for structural analysis, TEM and SEM for morphology, DLS and ELS for particle size and zeta potential, spectrofluorometry for luminescence properties, tensile testing for mechanical properties.