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Novel ternary g-C_3N_4/Fe_3O_4/MnWO_4 nanocomposites: Synthesis,characterization, and visible-light photocatalytic performance for environmental purposes

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Journal of Materials Science & Technology 2018年第9期34卷 1638-1651页

作者： Mitra Mousavi Aziz Habibi-Yangjeh Davod Seifzadeh Department of Chemistry Faculty of Science University of Mohaghegh Ardabili

The g-C3 N4/Fe3 O4/MnWO4 nanocomposites were prepared by a refluxing-calcination procedure. Visiblelight-induced photocatalytic experiments showed that the g-C3 N4/Fe3 O4/MnWO4（10%） nanocomposite has excellent ability to degrade a range of contaminants including rhodamine B, methylene blue, methyl orange, and fuchsine, which is about 7, 10, 25, and 31 times of the g-C3 N4 photocatalyst, *** species trapping experiments revealed that superoxide anion radicals play major role in the photodegradation reaction of rhodamine B（RhB）. After the treatment process, the utilized photocatalyst was magnetically recovered and reused with negligible loss in the photocatalytic activity, which is vital in the photocatalytic processes. Finally, a mechanism was proposed for the enhanced interfacial carrier separation and transfer and the improved photocatalytic performance.

关键词： g-C3N4/Fe3O4/MnWO4 magnetically recoverable photocatalyst Visible-light photocatalyst Wastewater

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Synthesis of magnetically recoverable visible-light-induced photocatalysts by combination of Fe3O4/ZnO with BiOI and polyaniline

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Progress in Natural Science:Materials International 2019年第2期29卷 145-155页

作者： Aziz Habibi-Yangjeh Maryam Shekofteh-Gohari Department of Chemistry Faculty of Science University of Mohaghegh Ardabili

magnetically recyclable photocatalysts with efficient performances under visible light were synthesized by combining Fe3O4/ZnO with BiOI and polyaniline（PANI）. The FT-IR, XRD, HRTEM, SEM, EDX, XPS, UV–vis DRS,VSM, BET, and PL instruments were utilized for characterization of the as-prepared products. The activity tests exhibited that the superior rate constant in photocatalytic performance was achieved over the Fe3O4/ZnO/BiOI/PANI（20%） nanocomposite, which enhanced for more than 59.9, 10.0, and 6.57 times, as compared to those of the Fe3O4/ZnO, Fe3O4/ZnO/PANI, and Fe3O4/ZnO/BiOI photocatalysts in degradation of RhB, *** photocatalytic degradations of MO/MB and photo reduction of Cr（VI） were also investigated to confirm the potential application of the photocatalyst in removal of various pollutants. The considerably enhanced activity pointed to a promoting effect of p-n-p heterojunctions formed between PANI, ZnO, and BiOI, and improved textural characteristics, which are benefit for improvement of the photocatalytic performances.

关键词： Fe3O4/ZnO/BiOI/PANI Heterojunction magnetically recoverable photocatalyst Visible-light-driven photocatalyst

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