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.
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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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Feng, S., Wang, R., Feng, S. et al. Synthesis of Zr-based MOF nanocomposites for efficient visible-light photocatalytic degradation of contaminants. Res Chem Intermed 45, 1263–1279 (2019). https://doi.org/10.1007/s11164-018-3682-8
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DOI: https://doi.org/10.1007/s11164-018-3682-8