Correlation of surface area and ID/IG ratio of coconut shell graphene carbon synthesized using Hummers method: A review Yana Fitri Anggreni ; Rita Lestari ; Seftri Harika ; Yurike Fatmawati ; Delovita Ginting ; Romi Fadli Syahputra Komunikasi Fisika Indonesia 8 Sep 2026 10.31258/jkfi.23.1.29-38
