Volume 7 Issue 4
Aug.  2022
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Article Navigation >  Green Energy&Environment  > 2022  >  7(4): 712-722
Wei Zhang, Jiajun Wang, Zewei Liu, Yibing Pi, Rong Tan. Visible light-driven oxidant-free dehydrogenation of alcohols in water using porous ultrathin g-C3N4 nanosheets. Green Energy&Environment, 2022, 7(4): 712-722. doi: 10.1016/j.gee.2020.11.019
Citation: Wei Zhang, Jiajun Wang, Zewei Liu, Yibing Pi, Rong Tan. Visible light-driven oxidant-free dehydrogenation of alcohols in water using porous ultrathin g-C3N4 nanosheets. Green Energy&Environment, 2022, 7(4): 712-722. doi: 10.1016/j.gee.2020.11.019
shu

Visible light-driven oxidant-free dehydrogenation of alcohols in water using porous ultrathin g-C3N4 nanosheets

doi: 10.1016/j.gee.2020.11.019

  • National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, China

Funds:

The authors are grateful for the financial support provided by the National Natural Science Foundation of China (21676078), the Natural Science Foundation of Hunan Province for Distinguished Young Scholar (2016JJ1013), Scientific Research Fund of Hunan Provincial Education Department (19A323), and Science and Technology Planning Project of Hunan Province (2018TP1017). We also thank Dr. Chaoping Li and Shiye Li for their helpful discussions.

  • Received date 29 July 2020, Accepted date 18 November 2020, RevRecd date 27 October 2020, Publish date 21 November 2020,
    Abstract
  • Graphitic carbon nitride (g-C3N4) is a fascinating photocatalyst for solar energy utilization in photo-catalysis. Nevertheless, it often suffers from moderate photo-catalytic activity due to its low specific surface area and fast recombination rate of photogenerated electrons upon photo-excitation. Herein, we overcome the bottlenecks by constructing a porous g-C3N4 nanosheet ( PCNS ) through a simple thermal oxidation etching method. Benefited from its porous layer structure, the obtained PCNS exhibits large specific surface area, efficient separation of photogenerated charge carriers, as well as high exposure of active sites. As a result, it is robust and universal in visible light-driven dehydrogenation of alcohols in water under oxidant-free condition. Almost quantitative yields (> 99%) of various valuable carbonyl compounds were obtained over PCNS , while bulk g-C3N4 was far less efficient. Moreover, the photo-catalyst was highly stable and could be facilely recovered from the aqueous system for efficient reuse. The easy preparation and excellent performance made PCNS a promising and competitive photocatalyst for the solar applications.

     

    • These authors contributed equally to this work and should be considered co-first authors.
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