Highly efficient photocatalysis toward tetracycline of nitrogen doped carbon quantum dots sensitized bismuth tungstate based on interfacial charge transfer.

Title Highly efficient photocatalysis toward tetracycline of nitrogen doped carbon quantum dots sensitized bismuth tungstate based on interfacial charge transfer.
Authors J. Zhang; X. Yuan; L. Jiang; Z. Wu; X. Chen; H. Wang; H. Wang; G. Zeng
Journal J Colloid Interface Sci
DOI 10.1016/j.jcis.2017.09.083
Abstract

In this study, a novel N-CQDs/Bi2WO6 was synthesized through a facile hydrothermal method. Multiple techniques were applied to investigate the structures, morphologies, optical and electronic properties and photocatalytic performance of as-prepared samples. The results indicated that the hybrid materials were formed with N-CQDs attached on the surface of sphere-like Bi2WO6. The photocatalytic activity of N-CQDs/Bi2WO6 materials was evaluated sufficiently by using tetracycline (TC) as target organic pollutant. N-CQDs/Bi2WO6-5 displayed superior photocatalytic efficiency with nearly 97% removal of TC in 25min and 86.37% mineralization in 90min. The degradation reaction coefficient (kobs) was approximately two times higher than pure Bi2WO6 as a result of the synergistic effects of N-CQDs and Bi2WO6. Increased light harvesting capacity, excellent electron transfer ability and improved molecular oxygen activation ability were obtained in N-CQDs/Bi2WO6 hybrid materials caused by N-CQDs. The present study demonstrated that N-CQDs modification was an effective way to improve photocatalytic efficiency, which can be extended to a general strategy for other semiconductors. The study indicated that novel N-CQDs/Bi2WO6 has a great potential for rapid and efficient treatment of organic pollutants in water.

Citation J. Zhang; X. Yuan; L. Jiang; Z. Wu; X. Chen; H. Wang; H. Wang; G. Zeng.Highly efficient photocatalysis toward tetracycline of nitrogen doped carbon quantum dots sensitized bismuth tungstate based on interfacial charge transfer.. J Colloid Interface Sci. 2018;511:296306. doi:10.1016/j.jcis.2017.09.083

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