4.7 Article

Construction of a hierarchical NiFe2O4/CuInSe2 (p-n) heterojunction: Highly efficient visible-light-driven photocatalyst in the degradation of endocrine disruptors in an aqueous medium

期刊

CERAMICS INTERNATIONAL
卷 47, 期 7, 页码 8996-9007

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.12.022

关键词

CuInSe2; NiFe2O4; Nanocomposites; Visible light; Endocrine disruptors

资金

  1. Scientific and Science and Technology Research Program of Chongqing Municipal Education Commission [KJQN202003306, KJQN201903408, KJQN201803307]
  2. Natural Science Foundation of Chongqing [cstc2020jcyj-msxmX0949]

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This study successfully synthesized CuInSe2/NiFe2O4 nanocomposites using a solid-state preparation method and found that they showed excellent degradation of endocrine disruptors under visible light. The hydroxyl radicals and holes in CuInSe2/NiFe2O4 nanocomposites played a crucial role in the removal of pollutants.
The present study reports the effective solid-state preparation of CuInSe2/NiFe2O4 nanocomposites by simple MOF-assisted synthesis at moderate temperatures. The as-synthesized CuInSe2/NiFe2O4 nanocomposites were systematically analysed to evaluate their structural and morphological features using XRD, SEM, and HRTEM. The photocatalytic performances of the CuInSe2/NiFe2O4 nanocomposites were evaluated for the degradation of two endocrine disruptors namely, bisphenol-A and resorcinol. The photocatalytic performances revealed that the CuInSe2/NiFe2O4 nanocomposite enabled a higher removal rate of bisphenol-A and resorcinol under visible light. The generated (degrees OH) and holes (h(+)) played a major role in CuInSe2/NiFe2O4 nanocomposites by the removing of aqueous bisphenol-A and resorcinol. In addition, CuInSe2/NiFe2O4 photocatalysts could be easily separated from treated wastewater by using an external magnetic field and they were easily recycled, making them an ideal candidate for environmental remediation. Here, CuInSe2/NiFe2O4 nanocomposites were prepared for the first time by coupling MOF-derived NiFe2O4 with CuInSe2 in the solid-state, route was reported for the first time. From the experimental results and degradation studies, we proposed photocatalytic mechanisms for improving CuInSe2/NiFe2O4 nanocomposite photocatalytic performance. The well-organized heterostructure effect and effective separation of photoinduced charge carriers between NiFe2O4 and CuInSe2 enabled faster degradation. The synthesized recyclable CuInSe2/NiFe2O4 nanocomposite has been applied as an alternative photocatalyst material in the treatment of both households and various industrial pollutants.

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