期刊
CHEMSUSCHEM
卷 12, 期 14, 页码 3236-3242出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201901176
关键词
chiral nematic; chitin; enantioselective adsorption; hydrothermal carbonization; nanofiber
资金
- Korea Research Institute of Chemical Technology [SI1909]
- Ministry of Trade, Industry & Energy through the Technology Innovation Program [10070150]
- Ministry of Science, ICT & Future Planning [NRF-2019R1C1C1003888, NRF-2017R1E1A1A01072798, NRF-2017R1A2B3006354]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10070150] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [10Z20130012243, 10Z20130012893] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Well-known hard-template methods for nitrogen (N)-doped chiral carbon nanomaterials require complicated construction and removal of the template, high-temperature pyrolysis, harsh chemical treatments, and additional N-doping processes. If naturally occurring chiral nematic chitin nanostructures [(C8H13NO5)(n)] in exoskeletons were wholly transformed into an N-doped carbon, this would be an efficient and sustainable method to obtain a useful chiral nanomaterial. Here, a simple, sacrificial-template-free, and environmentally mild method was developed to produce an N-doped chiral nematic carbon-sheath nanofibril hydrogel with a surface area >300 m(2) g(-1) and enantioselective properties from renewable chitin biomass. Calcium-saturated methanol physically exfoliated bulk chitin and produced a chiral nematic nanofibril hydrogel. Hydrothermal treatment of the chiral chitin hydrogel at 190 degrees C produced an N-doped chiral carbon-sheath nanofibril hydrogel without N-doping. This material preferentially adsorbed d-lactic acid over l-lactic acid and produced 16.3 % enantiomeric excess of l-lactic acid from a racemic mixture.
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