biostudies-literatureUnknown11(25)Mahmood FCost-effective valorization of biomass into advanced carbon remains a challenge. Here we reported a facile and ultrafast laser writing technique to convert biomass into porous graphene for electrochemical sensing. Laser-induced graphene (LIG) was synthesized from a fully biomass-based film composed of kraft lignin (KL) and cellulose nanofibers (CNFs). The LIG-based electrode was applied to detect dopamine using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. Dopamine with a concentration ranging from 5 to 40 μM was detected linearly, with a sensitivity of 4.39 μA μM^-1 cm^-2. Our study eliminated the use of synthetic polymer for lignin-based film formation. It demonstrated the feasibility of using the film fully composed of biomass for LIG fRSC advances15410-15415https://www.ebi.ac.uk/biostudies/studies/S-EPMC8698650biostudies-literatureBiomass-derived porous graphene for electrochemical sensing of dopamine.PMC8698650Wan CSun YMahmood FfalseBiomass-derived porous graphene for electrochemical sensing of dopamine.Cost-effective valorization of biomass into advanced carbon remains a challenge. Here we reported a facile and ultrafast laser writing technique to convert biomass into porous graphene for electrochemical sensing. Laser-induced graphene (LIG) was synthesized from a fully biomass-based film composed of kraft lignin (KL) and cellulose nanofibers (CNFs). The LIG-based electrode was applied to detect dopamine using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. Dopamine with a concentration ranging from 5 to 40 μM was detected linearly, with a sensitivity of 4.39 μA μM^-1 cm^-2. Our study eliminated the use of synthetic polymer for lignin-based film formation. It demonstrated the feasibility of using the film fully composed of biomass for LIG f2021-01-01T00:00:00Z2021 Apr2025-04-22T09:58:38.412Z2025-04-05T23:21:31.898ZS-EPMC86986503542406110.1039/d1ra00735a