TY - JOUR
T1 - A facile method to prepare reduced graphene oxide with a large pore volume
AU - Yuan, Bihe
AU - Shi, Yongqian
AU - Mu, Xiaowei
AU - Wang, Junling
AU - Xing, Weiyi
AU - Liew, Kim Meow
AU - Hu, Yuan
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Large size reduced graphene oxide (RGO) tends to restack or form irreversible agglomerates during the conventional drying. In this work, a facile and efficient drying method, involving freezing-thawing-drying approach, is developed to prepare porous RGO. The RGO exhibits a large pore volume (0.414 cm3/g) and specific surface area (294.9 m2/g). The RGO can be easily ground using mortar and pestle and be dispersed in solvent by ultrasonication. The RGO shows porous nanostructure and poorly-stacked layered structure. Compared with the RGO dried by conventional method, the RGO dried by this modified process possesses similar structural defect density. The ice crystal formed by liquid nitrogen is expected to prevent the restacking of graphene nanosheets and be beneficial to obtain porous structure.
AB - Large size reduced graphene oxide (RGO) tends to restack or form irreversible agglomerates during the conventional drying. In this work, a facile and efficient drying method, involving freezing-thawing-drying approach, is developed to prepare porous RGO. The RGO exhibits a large pore volume (0.414 cm3/g) and specific surface area (294.9 m2/g). The RGO can be easily ground using mortar and pestle and be dispersed in solvent by ultrasonication. The RGO shows porous nanostructure and poorly-stacked layered structure. Compared with the RGO dried by conventional method, the RGO dried by this modified process possesses similar structural defect density. The ice crystal formed by liquid nitrogen is expected to prevent the restacking of graphene nanosheets and be beneficial to obtain porous structure.
KW - Freezing-thawing-drying
KW - Pore volume
KW - Reduced graphene oxide
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84943603905&origin=recordpage
UR - http://www.scopus.com/inward/record.url?scp=84943603905&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2015.10.011
DO - 10.1016/j.matlet.2015.10.011
M3 - RGC 21 - Publication in refereed journal
SN - 0167-577X
VL - 162
SP - 154
EP - 156
JO - Materials Letters
JF - Materials Letters
ER -