Continuous Hydrothermal Flow Synthesis of Blue-Luminescent, Excitation-Independent Nitrogen-Doped Carbon Quantum Dots as Nanosensors
Journal article
Baragau, I., Power, N., Morgan, D., Heil, T., Lobo, R., Roberts, C., Titirici, M.M., Dunn, S. and Kellici, S. (2020). Continuous Hydrothermal Flow Synthesis of Blue-Luminescent, Excitation-Independent Nitrogen-Doped Carbon Quantum Dots as Nanosensors. Journal of Materials Chemistry A. (8), pp. 3270-3279. https://doi.org/10.1039/C9TA11781D
| Authors | Baragau, I., Power, N., Morgan, D., Heil, T., Lobo, R., Roberts, C., Titirici, M.M., Dunn, S. and Kellici, S. |
|---|---|
| Abstract | Blue-luminescent N-doped carbon quantum dots (NCQDs) exhibiting rarely observed excitation independent optical properties are synthesised from citric acid in the presence of ammonia via a Continuous Hydrothermal Flow Synthesis (CHFS) approach. CHFS is an eco-friendly, rapid synthetic approach (within fractions of a second) facilitating ease of scale-up industrialization as well as offering materials with superior properties. The synthesised CQDs readily disperse in aqueous solution, have an average particle size of 3.3 ± 0.7 nm, with highest emission intensity at 441 nm (and a narrow full width at half maximum, FWHM ~78 nm) under a 360 nm excitation wavelength. Carbon quantum dots, without any further modification, exhibited a high selectivity and sensitivity as a nano-sensor for the highly toxic and carcinogenic chromium(VI) ions. The nano-chemo-sensor delivers significant advantages including simplicity of manufacturing via a continuous, cleaner technology (using targeted biomass precursor), high selectivity, sensitivity and fast response leading to potential applications in environmental industry as well photovoltaics, bio-tagging, bio-sensing and beyond. |
| Keywords | carbon quantum dots; continuous hydrothermal flow synthesis; chromium (VI) sensing |
| Year | 2020 |
| Journal | Journal of Materials Chemistry A |
| Journal citation | (8), pp. 3270-3279 |
| Publisher | Royal Society of Chemistry (RSC) |
| ISSN | 2050-7488 |
| Digital Object Identifier (DOI) | https://doi.org/10.1039/C9TA11781D |
| Publication dates | |
| Online | 10 Jan 2020 |
| Publication process dates | |
| Accepted | 10 Jan 2020 |
| Deposited | 14 Jan 2020 |
| Accepted author manuscript | License File Access Level Open |
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