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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†

Haitao Li,a   Ruihua Liu,a   Suoyuan Lian,ab   Yang Liu,*a   Hui Huanga  and  Zhenhui Kang*a  
Author affiliations

* Corresponding authors

a Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, No.199 Ren-ai Road, Suzhou, China
E-mail: zhkang@suda.edu.cn, yangl@suda.edu.cn
Fax: +86-512-65882846
Tel: +86-512-65880957

b School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China

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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Article information

https://doi.org/10.1039/C3NR00092C
Submitted
07 Jan 2013
Accepted
29 Jan 2013
First published
06 Feb 2013
Nanoscale, 2013,5, 3289-3297
Article type
Paper
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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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