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g-C3N4 quantum dots-modified mesoporous TiO2–SiO2 for enhanced photocatalysis

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Abstract

The utilization of TiO2-based photocatalysts for an efficient removal of dye pollutants is limited due to their low surface area, high recombination rate of the photo-generated electrons and holes and an insufficient absorption of sunlight with only 3–4% use of solar energy. Based on this background, we have successfully fabricated a carbon nitride quantum dots (CNQDs)-modified mesoporous TiO2–SiO2 (Me-TSCN) via a simple calcination method since the mesoporous structure is expected to induce a great increase in the specific surface area by carbon nitride quantum dots, being favorable for the adsorption of the reactant molecules and the mass transfer of the reaction products. Furthermore, such CNQD modification facilitates the separation of photo-generated electrons and holes. As a result, the composite's modification with structural design could significantly improve the photocatalytic activity of TiO2-based catalysts, achieving outstanding photocatalytic activity in the degradation of dye pollutants such as rhodamine B.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (21777044, 21677048), the National Key Research and Development Program (2016YFA0204200), the China Postdoctoral Science Foundation (2015T8049), the Science and Technology Commission of Shanghai Municipality (16JC1401400, 17520711500), and the Fundamental Research Funds for the Central Universities (222201714061, 222201817009, 222201815006 and 222201818014).

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Authors and Affiliations

  1. State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People’s Republic of China

    Jie Yu, Juying Lei & Yongdi Liu

  2. Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, People’s Republic of China

    Juying Lei & Yongdi Liu

  3. Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People’s Republic of China

    Lingzhi Wang & Jinlong Zhang

  4. University of Lyon, Institute of Researches on Catalysis and Environment in Lyon (IRCELYON) CNRS, Université Claude Bernard Lyon 1, 69626, Villeurbanne, France

    Chantal Guillard

  5. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350116, Fujian, China

    Masakazu Anpo

  6. Department of Applied Chemistry, Osaka Prefecture University, Sakai, Osaka, 598-8531, Japan

    Masakazu Anpo

Authors
  1. Jie Yu
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  2. Juying Lei
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  3. Lingzhi Wang
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  4. Chantal Guillard
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  5. Jinlong Zhang
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  6. Yongdi Liu
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  7. Masakazu Anpo
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Correspondence to Jinlong Zhang or Yongdi Liu.

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This article is dedicated to Prof. Anna Eremenko.

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Yu, J., Lei, J., Wang, L. et al. g-C3N4 quantum dots-modified mesoporous TiO2–SiO2 for enhanced photocatalysis. Res Chem Intermed 45, 4237–4247 (2019). https://doi.org/10.1007/s11164-019-03903-3

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  • DOI: https://doi.org/10.1007/s11164-019-03903-3

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