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Issue 8, 2013
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Near-infrared light controlled photocatalytic activity of carbon quantum dots for highly selective oxidation reaction

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Abstract

Selective oxidation of alcohols is a fundamental and significant transformation for the large-scale production of fine chemicals, UV and visible light driven photocatalytic systems for alcohol oxidation have been developed, however, the long wavelength near infrared (NIR) and infrared (IR) light have not yet fully utilized by the present photocatalytic systems. Herein, we reported carbon quantum dots (CQDs) can function as an effective near infrared (NIR) light driven photocatalyst for the selective oxidation of benzyl alcohol to benzaldehyde. Based on the NIR light driven photo-induced electron transfer property and its photocatalytic activity for H2O2 decomposition, this metal-free catalyst could realize the transformation from benzyl alcohol to benzaldehyde with high selectivity (100%) and conversion (92%) under NIR light irradiation. HO˙ is the main active oxygen specie in benzyl alcohol selective oxidative reaction confirmed by terephthalic acid photoluminescence probing assay (TA-PL), selecting toluene as the substrate. Such metal-free photocatalytic system also selectively converts other alcohol substrates to their corresponding aldehydes with high conversion, demonstrating a potential application of accessing traditional alcohol oxidation chemistry.

Graphical abstract: Near-infrared light controlled photocatalytic activity of carbon quantum dots for highly selective oxidation reaction

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Publication details

The article was received on 07 Jan 2013, accepted on 29 Jan 2013 and first published on 06 Feb 2013


Article type: Paper
DOI: 10.1039/C3NR00092C
Nanoscale, 2013,5, 3289-3297

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    Near-infrared light controlled photocatalytic activity of carbon quantum dots for highly selective oxidation reaction

    H. Li, R. Liu, S. Lian, Y. Liu, H. Huang and Z. Kang, Nanoscale, 2013, 5, 3289
    DOI: 10.1039/C3NR00092C

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