A.N. Amanah, N. Sulistyowati, F.U. Fadila, L. Aprilia, Y. Pradana, I.T. Sugiarto, N.A. Fauziyah, P.S. Tola
Lignin, an abundant but underutilized polyaromatic biopolymer from wood-processing waste, can be upcycled into graphene-like materials via laser-induced graphene (LIG), offering a sustainable strategy for advanced material development. In this study, lignin was extracted from wood waste using alkaline treatment and directly converted into graphene-like structures through LIG under ambient conditions. The resulting materials were systematically characterized by UV-Vis, FTIR, and Raman spectroscopy. Raman spectra confirmed successful graphitization, showing distinct G and D bands. To evaluate functionality, hygroelectric generator (HEG) devices fabricated from lignin-derived graphene exhibited stable voltage responses across varying humidity levels, demonstrating efficient humidity-driven energy harvesting. These findings highlight the feasibility of converting lignin into high-value carbon materials with potential applications in renewable and clean energy technologies. Overall, this approach provides a sustainable route for transforming biomass waste into functional nanostructured materials, contributing to renewable energy innovation and environmental sustainability. © Published under licence by IOP Publishing Ltd.
Department Of Physics, Universitas Negeri Semarang, Semarang, Indonesia; Department Of Physics, Universitas Negeri Jakarta, Jakarta, Indonesia; Research Center For Photonics, The National Research And Innovation Agency, Tangerang Selatan, Indonesia; Department Of Physics, Universitas Pembangunan Nasional "veteran" Jawa Timur, Surabaya, Indonesia
