General Information
    • ISSN: 2010-0221 (Print)
    • Abbreviated Title: Int. J. Chem. Eng. Appl.
    • Frequency: Quarterly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Prof. Dr. Shen-Ming Chen
    • Executive Editor: Jennifer X. Zeng
    • Abstracting/ Indexing:  CNKI, Google Scholar, EBSCO, ProQuest,  Crossref, etc.
    • Email:
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Prof. Dr. Shen-Ming Chen
National Taipei University of Technology, Taiwan

IJCEA 2019 Vol.10(2): 56-59 ISSN: 2010-0221
doi: 10.18178/ijcea.2019.10.2.740

Enhanced Photocatalytic Activity of Carbon Dots Grafted TiO2 Nanorods

Shimin Cai
Abstract—TiO2, one of the most promising photocatalysts, is widely used in air purification, sewage treatment, water splitting, carbon dioxide reduction, and solar cells. However, TiO2 can only absorb ultraviolet light, which makes up only a small fraction (< 4%) of the total solar spectrum. Therefore, we successfully prepared carbon dots (CDs) by low-voltage electrolysis of ethanol/sodium hydroxide/water mixture. TEM image shows that the prepared CDs are monodispersed spherical particles with a diameter of 3-5 nm. CDs-grafted TiO2 nanorods (CDs-TiO2 nanorods) were prepared by hydrothermal treatment of CDs and TiO2 nanorod solution at 200ºC. TGA shows that the content of CDs in CDs-TiO2 nanorods was about 0.8%. UV-Dis shows that CDs could significantly improve the visible light absorption property of TiO2 nanorods. With methyl orange as a model pollutant, the photocatalytic activity of CDs-TiO2 nanorods was 2.17 times higher than that of TiO2 nanorods under visible light irradiation.

Index Terms—Carbon dots, photocatalytic activity, titanium dioxide, visible light.

S. Cai Author is with the Choate Rosemary Hall, Wallingford, CT 06492 USA (e-mail:


Cite: Shimin Cai, "Enhanced Photocatalytic Activity of Carbon Dots Grafted TiO2 Nanorods," International Journal of Chemical Engineering and Applications vol. 10, no. 2, pp. 56-59, 2019.

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