Abstract
The photocatalytic degradation of Rhodamine B (Rh B) wastewater using Ag/g-C3N4 composites has aroused great interests. To date, the composite is dominated by Ag nanoparticles (AgNPs) on the g-C3N4 surface. Only a few studies have concentrated on 1D Ag nanowires (AgNWs) wrapped with g-C3N4 which could bring some new aspects. The wrapped structures can provide large interface, which promotes the exciton dissociation. Moreover, AgNWs with high conductivity can facilitate a fast charge transfer from g-C3N4 and therefore suppress the charge recombination. Herein, a facile approach via a post-mechanical-mixing route has been used to fabricate 1D-2D AgNWs/g-C3N4 composites with enhanced photocatalytic activity for Rh B degradation. AgNWs staggered arrangement can form a conductive network for fast charge transfer. The light absorption of the hybrid in the visible-light region is increased due to the light-scattering from 1D AgNWs. Moreover, conformal contact between AgNWs and g-C3N4 promotes the separation of photo-induced electron-hole pairs. The AgNWs/g-C3N4 hybrid for 2 wt% achieves the best photocatalytic activity for Rh B dye degradation. This work reports an idea using 1D–2D metal-organic hybrid materials as photocatalysts and proposes a facile post-mechanical-mixing method for fabricating hybrids toward various applications.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (51902259), the Fundamental Research Funds for the Central Universities of NPU (3102019MS0401), the China Postdoctoral Science foundation (2018M641017), the Natural Science Foundation of Shaanxi Province (2020JQ-181). We also would like to thank the Analytical & Testing Center of Northwestern Polytechnical University for XRD, XPS and SEM tests.
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All authors have contributed to the conceptualization of the work. Data curation and formal analysis was performed by Lin Lei, Weijia Wang, Wenjie Yu, Chao Wang. Funding was acquired by Weijia Wang and Huiqing Fan. All authors have contributed to data discussion and to writing the manuscript.
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Lei, L., Wang, W., Yu, W. et al. 1D-2D Ag nanowire/g-C3N4 hybrid obtained via a post-mechanical-mixing route for photocatalytic Rhodamine B degradation. Res Chem Intermed 46, 4673–4684 (2020). https://doi.org/10.1007/s11164-020-04229-1
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DOI: https://doi.org/10.1007/s11164-020-04229-1