Fabrication of CoFe2O4-modified and HNTs-supported g-C3N4 heterojunction photocatalysts for enhancing MBT degradation activity under visible light

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It is still a challenging work to realize the universality of photocatalytic materials for unselectively removing environmental pollutants in water. Here, a ternary magnetism CoFe2O4/g-C3N4/HNTs heterojunction photocatalyst is firstly prepared, and the morphology, crystalline property, surface area, and magnetic recycling capability of the photocatalyst were investigated. The CoFe2O4/g-C3N4/HNTs shows a superior degradation efficiency for degrading 2-mercaptobenzothiazole (MBT) than that of pure g-C3N4. The high degradation performance that derives from the hollow structure of halloysite nanotubes (HNTs) can inhibit stacking of g-C3N4, which results in a larger specific surface area and more abundant reaction sites. Meanwhile, the heterojunction structure between g-C3N4 and CoFe2O4 improved the separation efficiency of charge carriers. In addition, the intermediate products, degradation pathway, and reaction mechanism of representative MBT pollutant over the CoFe2O4/g-C3N4/HNTs photocatalyst are revealed in depth. This work makes an important development.

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This work is financially supported by the National Natural Science Foundation of China (Nos. U1662125, 21908080, 21871124), the Natural Science Foundation of Jiangsu Province (Nos. BK20190862, BK20181231 and BK20180884), and China Postdoctoral Science Foundation-funded project (Nos. 2016M590418).

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Correspondence to Xu Tang or Pengwei Huo.

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Zhu, Z., Ma, C., Yu, K. et al. Fabrication of CoFe2O4-modified and HNTs-supported g-C3N4 heterojunction photocatalysts for enhancing MBT degradation activity under visible light. J Mater Sci 55, 4358–4371 (2020) doi:10.1007/s10853-019-04170-8

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