Table 1.

Graphene preparation process of some Chinese companies.

No	Preparation Methods	Companies
1	Reduction of Graphene Oxide	Ningbo Morch Technology Co., Ltd. (Ningbo, China) The Sixth Element (Changzhou) Materials Technology Co., Ltd. (Changzhou, China) SUNANO ENERGY (Taizhou, China) Shanghai Carbon Source Huigu New Material Technology Co., Ltd. (Shanghai, China) Jining Lite Nanotechnology Co., Ltd. (Jining, China) Beijing Carbon Century Technology Co., Ltd. (Beijing, China) Xiamen Kaina Graphene Technology Co., Ltd. (Xiamen, China)
2	Liquid-Phase Exfoliation	Deyang Carbonene Technology Co., Ltd. (Deyang, China) Hengli Sheng Tai (Xiamen) Graphene Technology Co., Ltd. (Xiamen, China) Shanghai LEVSON Nanotechnology Co., Ltd. (Shanghai, China)
3	Supercritical Fluid Exfoliation	Nanjing Ke Fu Nanotechnology Co., Ltd. (Nanjing, China) Qingdao Delta Nanotechnology Co., Ltd. (Qingdao, China)
4	Chemical Vapor Deposition	Chongqing Mo Xi Technology Co., Ltd. (Chongqing, China) Changzhou Two Dimensional Carbon Technology Co., Ltd. (Changzhou, China)