Structural Modification of Graphene Sheets to Create a Dense Network of Defect Sites.
Pt/graphene composites were synthesized by loading platinum nanoparticles onto graphene and etched at 1000 °C in a hydrogen atmosphere. This results in the formation of a dense array of nanostructured defect sites in the graphene, including trenches, nanoribbons, islands, and holes. These defect sites result in an increase in the number of unsaturated carbon atoms and, consequently, enhance the interaction of the CO2 molecules with the etched graphene. This leads to a high capacity for storing CO2; 1 g of the etched samples can store up to 76.3 cm(3) of CO2 at 273 K under ambient pressure.
†Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University, Indianapolis, Indiana 46202, United States.
Mei-Xian
MX
Wang
†Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University, Indianapolis, Indiana 46202, United States.
Qi
Q
Liu
†Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University, Indianapolis, Indiana 46202, United States.
Zhe-Fei
ZF
Li
‡School of Materials Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States.
Hong-Fang
HF
Sun
§Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States.
Eric A
EA
Stach
†Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University, Indianapolis, Indiana 46202, United States.
Jian
J
Xie
CO2 adsorption; Pt−graphene composites; defect sites; graphene