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Synthesis of Zr-based MOF nanocomposites for efficient visible-light photocatalytic degradation of contaminants

  • Sheng Feng
  • Runbai Wang
  • Shanshan Feng
  • Zhihui Zhang
  • Lebao Mao
Article
  • 11 Downloads

Abstract

A novel ternary complex photocatalyst (UiO-66/g-C3N4/Ag) was fabricated by chemical protonation coating and photodeposition and its physicochemical parameters, crystal morphology, and electrochemical properties characterized using a series of techniques. Proper addition of g-C3N4 and Ag effectively enhanced the separation and mobility of photoinduced charge and improved the visible-light absorption and thereby the catalytic performance. Degradation experiments on target contaminants such as Rhodamine B (RhB) dye and 2,4-dichlorophenoxyacetic acid (2,4-d) showed that the photocatalytic ability of UiO-66/g-C3N4/Ag(15) was greatly increased compared with the parent material. Moreover, the composite could be regenerated by a simple ethanol washing process and exhibited stability and high reusability over six cycles. Finally, experiments on trapping of active species revealed that superoxide radicals (·O 2 ), holes (h+), and hydroxyl radicals (·OH) were primarily responsible for the photodegradation of RhB and 2,4-d.

Keywords

UiO-66/g-C3N4/Ag Photocatalysis RhB 2,4-d Catalytic mechanism 

Notes

Acknowledgements

The authors sincerely acknowledge financial support from the National Natural Science Foundation of China (nos. 41371446 and 41271498), National Social Science Foundation of China (No. 16BJL074), and SKLECRA2014OFP10.

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Sheng Feng
    • 1
  • Runbai Wang
    • 1
  • Shanshan Feng
    • 1
  • Zhihui Zhang
    • 2
  • Lebao Mao
    • 3
  1. 1.School of Environmental and Safety EngineeringChangzhou UniversityJiangsuChina
  2. 2.Jiangsu Key Laboratory of Advanced Catalytic Materials and TechnologyChangzhou UniversityJiangsuChina
  3. 3.Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei UniversityWuhanChina

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