Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 60, Issue -, Pages 643-650Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2015.11.013
Keywords
CdS/g-C-3 N-4 ultrathin nanosheets; Ultrasound exfoliation; Synergic effects; Photocatalytic property
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Funding
- NSF of China [21363027, 61564001]
- Scientific Research Foundation of GuangXi University [XGZ130765]
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Cadmium-assisted ultrasound exfoliation was used to synthesize CdS/g-C3N4 ultrathin nanosheet catalysts with visible-light photocatalytic activity. The samples showed enhanced photocatalytic performance. Xray diffraction, transmission electron microscopy, ultraviolet-visible diffuse reflection spectroscopy, Fourier transform infrared spectroscopy, and photoluminescence spectroscopy confirmed the synthesized CdS/g-C3N4 ultrathin nanosheets. The photocurrent intensity and degradation of methyl orange (MO) of ultrathin CdS/g-C3N4 photocatalyst were 2 and 1.4 times higher than those of CdS/g-C3N4 nanocomposite obtained via ultrasound exfoliation without assistance of cadmium ion. These results were due to the well-matched band structure and close contact interfaces between the g-C3N4 nanosheets and CdS, which resulted in the effective transfer and separation of the photogenerated charge carriers. The mechanism for the photodegradation of MO by ultrathin CdSig-C3N4 photocatalyst was also investigated. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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