Table 3.

The properties and origins of the carbon nanomaterials used in this study.

Carbon nanomateials	Origin	Shape	Size	Specific surface area (m2 g−1)
Graphene	JCNANO Technology Co. Ltd., Nanjing, China	Black flake	0.5–20 μm	40–60
Graphene oxide	Hengqiu Graphene Nanotechnology Co. Ltd., Suzhou, China	Black or brown yellow powder	Thickness 3.4–7.0 nm; diameter 10–50 μm	100–300
Carbon nanotube	Boyu Gaoke new material technology Co. Ltd., Beijing, China	Black powder	Diameter 20–40 nm; length 10–30 μm	>110