Energy-Efficient, Room-Temperature, and Facile Synthesis of Carbon Quantum Dots from Interstitial Compound TiC for the Selective Detection of Fe(III)
ACS SUSTAINABLE CHEMISTRY & ENGINEERING(2023)
摘要
The synthesis of carbon quantum dots (CQDs) from renewable resources is extensively regarded as a green approach, but this method is generally accompanied by high energy consumption and complex byproducts, which limit the large-scale production of CQDs. In this work, titanium carbide-derived CQDs (TiC-CQDs) were synthesized only by mixing titanium carbide and hydrogen peroxide (1 wt %) at room temperature. The resulting byproduct was converted to a precipitate by sodium hydroxide to purify the TiC-CQDs, and the reaction mechanism was further explored. The average lateral size of TiC-CQDs is 4.2 +/- 1.1 nm and shows excellent fluorescence properties. Moreover, in an acetic acid-sodium acetate buffer solution, the fluorescence of TiC-CQDs could be selectively quenched by a ferric ion (Fe3+) with a broad concentration range of 0.2-5 mu M and 5-60 mu M and a detection limit as low as 0.14 mu M. Due to the absence of the energy input, complex equipment, and nontoxic and harmless precursors, the novel room-temperature synthesis route of TiC-CQDs is energy-efficient, safe, green, and economical, and has great potential in industrial application.
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关键词
carbon quantum dots, titanium carbide, interstitialcompound, ion detection, peroxypolytitanic acid, energy efficient
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