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Issue 36, 2017
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Facile synthesis of photoluminescent inorganic–organic hybrid carbon dots codoped with B and N: towards an efficient lubrication additive

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Abstract

A novel environmentally friendly bis-functional dicationic ionic liquid containing chelated orthoborate was synthesized and polycondensed with glutamic acid in order to synthesize inorganic–organic carbon dots (CD/IL) consisting of an ionic liquid moiety inserted in the carbon skeleton. The obtained CD/IL was found to be a new kind of nitrogen/boron-codoped nanomaterial, one with a mean particle diameter of 2.66 nm. CD/IL was verified to be a high-performance lubricant additive: in particular, the anti-wear and friction-reducing properties of poly(ethylene glycol) (PEG) were improved by 89.34% and 62.18%, respectively, when 1% CD/IL was added. Lubricants consisting of a mixture of CD/IL and PEG showed intense blue photo-fluorescence, and the corresponding photoluminescence (PL) intensity decreased considerably after carrying out a tribo-test. Moreover, CD/IL became transferred onto a rubbing steel interface during the tribo-test according to EDX and Raman analyses of a worn surface. CD/IL showed poor crystallinity, and interestingly, an intense G (∼1600 cm−1) signature was detected on the steel surface after a high-load and long-duration tribo-test, which indicated that ordered carbon materials were generated on the interface, inhibiting the undesirable wear.

Graphical abstract: Facile synthesis of photoluminescent inorganic–organic hybrid carbon dots codoped with B and N: towards an efficient lubrication additive

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Publication details

The article was received on 03 Jul 2017, accepted on 30 Aug 2017 and first published on 30 Aug 2017


Article type: Paper
DOI: 10.1039/C7DT02389H
Citation: Dalton Trans., 2017,46, 12306-12312
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    Facile synthesis of photoluminescent inorganic–organic hybrid carbon dots codoped with B and N: towards an efficient lubrication additive

    Y. Zhang, T. Cai, W. Shang, D. Liu, Q. Guo and S. Liu, Dalton Trans., 2017, 46, 12306
    DOI: 10.1039/C7DT02389H

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