Akademik Veri Yönetim Sistemi
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, cilt.323, 2026 (SCI-Expanded, Scopus)
This study reports the synthesis, characterization, and catalytic evaluation of carbon nanotubes (CNT) and recycled polyethylene terephthalate (PET) composite derived from post-consumer water bottles for hydrogen production via sodium borohydride (NaBH4) methanolysis. The CNT/PET composites, prepared by melt compounding with varying CNT loadings, were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and scanning electron microscopy coupled with energydispersive X-ray analysis (SEM-EDX) to determine structural, chemical, and morphological properties. Density Functional Theory (DFT) calculations revealed synergistic electronic interactions and a reduced band gap (Delta E) in the CNT/PET composite, correlating with enhanced catalytic performance. Kinetic studies demonstrated that the 35 wt% CNT/PET composite exhibited the highest hydrogen generation rate (HGR) of 25.25 L/min.gcatalyst under optimal conditions (6 mL methanol, 30 degrees C, 150 mg NaBH4), with a low activation energy (Ea) of 11.4 kJ/ mol. The catalyst maintained over 80 % of its initial activity after five successive cycles, highlighting excellent stability and reusability. Compared with literature-reported catalysts, the CNT/PET composite showed superior activity, lower Ea, and minimal catalyst loading requirements, positioning it as a cost-effective, sustainable, and scalable option for eco-friendly hydrogen production.