国家/地区 中国（2）
IPC部 B（2）
IPC大类 B82（2）
IPC小类 B82Y（2）
IPC B82Y040/00（2）
发明人 LI D（2）
公开年
申请年 2022（2）
专利权人

Preparing nitrogen and sulfur co-doped pH responsive graphene quantum dots used in pH value responsive reagent for selective iron detection, involves mixing carbon source compound and nitrogen and sulfur source compound, carrying out a hydrothermal reaction, centrifuging and filtering.

LI D, YAN J, ZHOU Y, LIU X

Preparing nano-graphene used as plugging agent in oil-based drilling fluid, comprises reacting graphite, oxidant i.e. ammonium persulfate and intercalating agent i.e. concentrated sulfuric acid, reacting with concentrated sulfuric acid and oxidant i.e. potassium permanganate, and gas-stripping.

DAI F, LI W, HUANG D, XIE G, LUO P, LI D, BAI Y