| Comparative Investigation of Fiber-Laser Irradiation Effects on Graphite and Lignosulfonate-Derived Carbon Structures |
| کد مقاله : 1305-ICOC |
| نویسندگان |
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مریم خانی نور *، بابک ژاله، احمد عقیل خربوط گروه فیزیک-دانشکده علوم پایه-دانشگاه بوعلی سینا-همدان-ایران |
| چکیده مقاله |
| Laser based modification of carbon materials has become an effective method for controlling their structural and chemical properties. Graphite, as a crystalline and thermally stable carbon allotrope, generally shows limited surface alteration under moderate laser exposure [1]. In contrast, sodium lignosulfonate (SLS) an amorphous and oxygen rich biopolymer from pulping processes undergoes pronounced structural transformation during laser irradiation, often leading to rapid carbonization and partial graphitization [2]. Comparing these two carbon sources under identical laser conditions provides valuable insight into their distinct thermal behaviors and transformation mechanisms. For the experimental procedure, a 2 cm × 2 cm piece of high purity graphite (Agar Scientific) and 0.2 g of sodium lignosulfonate powder (SLS) (Sigma Aldrich) were utilized. The samples were placed inside a glass container surrounded by a petri dish and were individually exposed to a fiber laser beam (model RFLP30Q, wavelength 1064 nm, frequency 20 kHz, power 15 W, and scanning speed 300 mm/s). The graphite powder generated through laser irradiation was collected and subsequently prepared for characterization. The graphite powder generated through laser irradiation was collected and subsequently prepared for characterization. The brown sodium lignosulfonate gradually darkened during laser irradiation and became completely black after approximately 25 min. The final product was washed several times with deionized water, centrifuged and subsequently dried at room temperature. The primary objective of this study is to conduct a comparative investigation of the structural and morphological responses of graphite and sodium lignosulfonate (SLS) under laser irradiation. The morphology of the obtained samples was examined using field emission scanning electron microscopy (FESEM). X-ray diffraction (XRD) analysis was employed to investigate the crystalline structure of the samples prior to and following laser irradiation. The findings revealed that, following irradiation, the surface of sodium lignosulfonate (SLS) developed a markedly porous architecture with a significantly enhanced specific surface area, a characteristic that markedly enhances its suitability for catalytic applications. Conversely, the nanostructured graphite formed upon irradiation, as evidenced by its pronounced crystallization tendency in the X ray diffraction pattern, presents itself as a highly promising candidate for incorporation into anticancer drug delivery systems |
| کلیدواژه ها |
| Fiber Laser, Graphite, Lignosulfonate, Laser-Material Interaction |
| وضعیت: پذیرفته شده |