A high-yield ionic liquid-promoted synthesis of boron nitride nanosheets by direct exfoliation

2015 ◽  
Vol 51 (60) ◽  
pp. 12068-12071 ◽  
Author(s):  
Takuya Morishita ◽  
Hirotaka Okamoto ◽  
Yoshihide Katagiri ◽  
Mitsumasa Matsushita ◽  
Kenzo Fukumori
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Boron Nitride ◽  
High Yield ◽  
Boron Nitrides ◽  
Boron Nitride Nanosheets

Ionic liquids dramatically promote exfoliation of bulk hexagonal boron nitrides into single- and few-layer boron nitride nanosheets with micron-sized edges.

High yield and greener C–H difluoromethylation reactions using copper iodide nanoparticles/boron nitride nanosheets as a versatile and recyclable heterogeneous catalyst

2021 ◽  
Author(s):  
Udayakumar Veerabagu ◽  
Gowsika Jaikumar ◽  
Fushen Lu ◽  
Franck Quero
Keyword(s):  
Boron Nitride ◽  
Heterogeneous Catalyst ◽  
High Efficiency ◽  
High Yield ◽  
Copper Iodide ◽  
Boron Nitride Nanosheets ◽  
Greener Synthesis ◽  
High Yields ◽  
Recyclable Heterogeneous Catalyst

The 3 wt% CuI/BNNS catalyst exhibited high efficiency for C–H difluoromethylation reactions and enabled greener synthesis at high yields using cyrene as a solvent. Furthermore, the catalyst could be easily recovered and recycled for at least five cycles.

Flame-retardant activity of modified boron nitride nanosheets to cotton

2019 ◽  
Vol 90 (5-6) ◽  
pp. 512-522 ◽  
Author(s):  
Hong Liu ◽  
Yang Du ◽  
Shaohua Lei ◽  
Zhuoqun Liu
Keyword(s):  
Boron Nitride ◽  
Flame Retardant ◽  
Hexagonal Boron Nitride ◽  
Cotton Fabrics ◽  
High Yield ◽  
Limiting Oxygen Index ◽  
Boron Nitride Nanosheets ◽  
Boron Nitride Powder ◽  
Coated Fabrics ◽  
Index Value

Boron nitride nanosheets (BNN) were prepared by molten hydroxide-assisted liquid exfoliation from hexagonal boron nitride powder with an effectively high yield, and then modified with hexachlorocyclotriphosphazene (HCCP) to obtain HCCP-BNN. The series of samples were applied to prepare flame-retardant cotton fabrics with the impregnation-drying method, and successful treatment was confirmed by scanning electron microscopy. The combustion performance of the as-prepared cotton fabrics was tested and evaluated. After coating with HCCP-BNN, the combustion rate of the fabric is reduced in vertical and horizontal combustion conditions and the limiting oxygen-index value of cotton fabric increases to 24.1, becoming less flammable than the blank cotton. The fibrous structure of the BNN and HCCP-BNN coated fabrics is relatively complete after combustion, which indicates that BNN have a certain protective effect on the fabric. The results demonstrate HCCP-BNN as an effective flame-retardant for cotton fabrics.

scholarly journals PRAVADOLINE SYNTHESIS USING AN IMIDAZOLIUM-BASED IONIC LIQUID AS A GREEN SOLVENT

2011 ◽  
Vol 14 (3) ◽  
pp. 79-86
Author(s):  
Nam Thanh Son Phan ◽  
Ha Vu Le
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Acid Catalyst ◽  
High Yield ◽  
Viet Nam ◽  
Pharmaceutical Chemical ◽  
Green Solvents ◽  
Green Solvent ◽  
1H And 13C Nmr ◽  
Lewis Acid Catalyst

An easily accessible ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) was synthesized, and characterized using 1H and 13C NMR, and MS. The ionic liquid was demonstrated to be an efficient green solvent for the synthesis of pravadoline, one of non-steroidal drugs. High yield was achieved without the presence of an anhydrous Lewis acid catalyst. The reaction was also successfully carried out using other imidazolium-based ionic liquids, including 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM][PF6]), and 1-octyl-3- methylimidazolium hexafluorophosphate ([OMIM][PF6]). To our best knowledge, this is the first report in Viet Nam on the synthesis of a pharmaceutical chemical in ionic liquids as green solvents.

High-Yield Synthesis of Boron Nitride Nanosheets with Strong Ultraviolet Cathodoluminescence Emission

2009 ◽  
Vol 113 (34) ◽  
pp. 15160-15165 ◽  
Author(s):  
Rui Gao ◽  
Longwei Yin ◽  
Chengxiang Wang ◽  
Yongxin Qi ◽  
Ning Lun ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Yield ◽  
Boron Nitride Nanosheets

scholarly journals Graphene-Analogues Boron Nitride Nanosheets Confining Ionic Liquids: A High-Performance Quasi-Liquid Solid Electrolyte

Small ◽  
2016 ◽  
Vol 12 (26) ◽  
pp. 3535-3542 ◽  
Author(s):  
Mingtao Li ◽  
Wenshuai Zhu ◽  
Pengfei Zhang ◽  
Yanhong Chao ◽  
Qian He ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Boron Nitride ◽  
Solid Electrolyte ◽  
High Performance ◽  
Boron Nitride Nanosheets

Ruthenium- and Rhodium-catalyzed Carbenoid Reactions of Diazoesters in Hexaalkylguanidinium-based Ionic Liquids

2012 ◽  
Vol 67 (4) ◽  
pp. 347-353 ◽  
Author(s):  
Torsten Large ◽  
Tobias Müller ◽  
Helene Kunkel ◽  
Stefan Buck ◽  
Gerhard Maas
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Reaction Medium ◽  
High Yield ◽  
Room Temperature Ionic Liquids ◽  
Tert Butyl ◽  
Trans Isomerization ◽  
Intermolecular Reaction

Hexaalkylguanidinium-based room-temperature ionic liquids were investigated as solvents for the cyclopropanation of styrene with diazoacetates catalyzed by Rh2(OAc)4 or [Ru2(μ-OAc)2(CO)4]n. While the yields of the formed cyclopropanes are much lower compared to the reactions performed in dichloromethane, the diastereomeric ratio is not significantly affected by the change of the reaction medium. Immobilization of the catalysts is only partially successful. In contrast to this intermolecular reaction, the Ru-catalyzed formation of a β -lactam by an intramolecular carbenoid C-H insertion of an α-methoxycarbonyl-α-diazoacetamide occurs in high yield, similar to the Rh2(OAc)4-catalyzed reaction. The cis → trans isomerization of the resulting 1-tert-butyl-3-methoxycarbonyl-4-phenylazetidin- 2-one is accelerated in the ionic liquid N,N-dibutyl-N’ ,N’-diethyl-N’,N’-dihexylguanidinium triflate.

In silico rational design of ionic liquids for the exfoliation and dispersion of boron nitride nanosheets

2016 ◽  
Vol 18 (2) ◽  
pp. 1212-1224 ◽  
Author(s):  
Gregorio García ◽  
Mert Atilhan ◽  
Santiago Aparicio
Keyword(s):  
Ionic Liquids ◽  
Boron Nitride ◽  
In Silico ◽  
Rational Design ◽  
Bulk Material ◽  
Boron Nitride Nanosheets

A requirement for exploiting most of the unique properties of boron-nitride (BN) nanosheets is their isolation from the bulk material.

Sign in / Sign up

Export Citation Format

Share Document