Sem300

A sample of HZSM-5 was examined by SEM on a Zeiss SEM300.

The synthesized pristine HAp nanoparticles, and Se-HAp and CC/Se-HAp nanocomposites were characterized for various structural and chemical properties. The phase composition of synthesized HAp, Se-HAp, and CC/Se-HAp was investigated by using XRD (PANalytical B.V., Netherlands). The morphology of synthesized nanomaterials was examined by transmission electron microscopy (TEM, Tecnai G2 20, FEI, Holland), while structural analysis was carried out using Gemini scanning electron microscope, SEM 300 (Zeiss Germany). FTIR (Vertex 70, Bruker, German) analysis was carried out to investigate the functional groups present in the pristine nanoparticles, using the classical KBr pellet system technique in transmission mode (See Supplementary Material for detailed information).

The ZSM-5 was sourced as a commercial powder-form zeolite catalyst supplied by Johnson Matthey (Si : Al ratio 30 : 1, BET surface area 370 m² g⁻¹). Scanning electron microscopy (Zeiss SEM300) revealed crystal sizes in the 0.2–1.0 μm range; typical crystallite size dimensions being 0.5 × 0.1 × 0.1 μm. The sample was calcined in air for 12 hours at 773 K to remove residual template material, followed by drying for three hours at 623 K under flowing helium (1000 sccm, CK gas, >99.999%) using a gas handling rig at the ISIS Facility, which is described elsewhere.^{11 (link)} The dried catalyst was transferred to an argon glovebox (MBraun UniLab MB-20-G, [H₂O] < 1 ppm, [O₂] < 1 ppm) and used to prepare samples for INS analysis as detailed below.