Nanocellulose has recently drawn attention because of its outstanding physical and mechanical properties. Even though nanocellulose is already a ubiquitous material in research, its synthesis and agglomeration still hinder the process of commercialisation. A shorter process will provide savings for larger scale production, and adding a capping agent can facilitate storage and handling on a commercial scale. In this study, the synthesis of nanocellulose was carried out using a one-pot method where the delignification and hydrolysis of cellulose were carried out in the same reactor. Delignification and bleaching used 30% (v/v) H₂O₂ at 90^oC for 5 hr. Meanwhile, hydrolysis using 8% (w/w) H₂SO₄ and 3% (w/w) of Fe(NO₃)₃.9H₂O 0.22 M as a catalyst, held for 1 hr at 75^oC, resulted in the lowest lignin composition 49.7% (w/w). Several analyses were carried out for the nanocellulose. TEM analysis showed the nanocellulose size from 5 to 70 nm. FTIR analysis showed that the nanocellulose was alike cellulose commercial. XRD analysis showed the crystallinity of nanocellulose is still relatively low (35.7%). The addition of a capping agent to nanocellulose showed a reduction of agglomeration for the ratio of nanocellulose to gelatin 1.00:0.75.