title: Large-Scale, Highly Efficient, and Green Liquid-Exfoliation of Black Phosphorus in Ionic Liquids.
abstract: We developed a facile, large-scale, and environmentally friendly liquid-exfoliation method to produce stable and high-concentration dispersions of mono- to few-layer black phosphorus (BP) nanosheets from bulk BP using nine ionic liquids. The prepared suspensions can stabilize without any obvious sedimentation and aggregation in ambient air for one month. In particular, the concentration (up to 0.95 mg mL(-1)) of BP nanoflakes obtained in 1-hydroxyethyl-3-methylimidazolium trifluoromethansulfonate ([HOEMIM][TfO]) is the highest reported for BP nanosheets dispersions. This work provides new opportunities for preparing atomically thin BP nanosheets in green, large-scale, and highly concentrated processes and achieving its in situ application.
authors.affiliation: Department of Chemistry, Renmin University of China , Beijing 100872, China.
authors.forename: Wancheng
authors.initials: W
authors.lastname: Zhao
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University , Beijing 100083, China.
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Xue
authors.affiliation: Department of Chemistry, Renmin University of China , Beijing 100872, China.
authors.forename: Jinfang
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Renmin University of China , Beijing 100872, China.
authors.forename: Jingyun
authors.initials: J
authors.lastname: Jiang
authors.affiliation: Department of Chemistry, Renmin University of China , Beijing 100872, China.
authors.forename: Xinhui
authors.initials: X
authors.lastname: Zhao
authors.affiliation: Department of Chemistry, Renmin University of China , Beijing 100872, China.
authors.forename: Tiancheng
authors.initials: T
authors.lastname: Mu
keywords: black phosphorus; high concentration; ionic liquids; liquid-exfoliation; phosphorene