Abstract

CuFe₂O₄ nanocrystals with the size about 60 nm were synthesized under hydrothermal conditions, and doped them into polyvinylidene fluoride (PVDF) membranes for enhancing their photocatalytic performance. The morphology, phase, and photoelectric performance of CuFe₂O₄/PVDF membranes were confirmed by X-ray photoelectron spectroscopic (XPS), scanning transmission microscopy (SEM), and transient photoelectrochemical analysis. As a result, the morphologies of CuFe₂O₄ nanocrystals could change with the concentration of NaOH solution under hydrothermal conditions. CuFe₂O₄ nanocrystals showed strong facet-dependent photoelectric and photocatalytic properties. PVDF membrane doped with CuFe₂O₄ nanocubes showed excellent photocatalytic activity of Congo red degradation (95%), and kept the good self-cleaning performance after five circles. The flux and rejection performance displayed the CuFe₂O₄ nanocubes/PVDF membrane kept high water flux (40 L/m² h) and Congo red rejection (99%), and the composite membrane have good potential in water treatment applications.

Schematic diagram of the removal of Congo red dye from CuFe₂O₄/PVDF membrane.

中文翻译：

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掺杂CuFe 2 O 4纳米晶体增强聚偏氟乙烯膜的光催化性能。

抽象的

在水热条件下合成了尺寸约为60 nm的CuFe ₂ O ₄纳米晶体，并将其掺杂到聚偏二氟乙烯（PVDF）膜中以增强其光催化性能。通过X射线光电子能谱（XPS），扫描透射显微镜（SEM）和瞬态光电化学分析证实了CuFe ₂ O ₄ / PVDF膜的形态，相和光电性能。结果，在水热条件下，CuFe ₂ O ₄纳米晶体的形貌会随着NaOH溶液的浓度而变化。铜铁₂ O ₄纳米晶体表现出很强的面依赖性光电和光催化性能。掺杂有CuFe ₂ O ₄纳米立方体的PVDF膜表现出优异的刚果红降解的光催化活性（95％），并经过五次循环后仍保持良好的自清洁性能。通量和截留性能表明，CuFe ₂ O ₄纳米立方体/ PVDF膜保持了高水通量（40 L / m ²  h）和刚果红截留率（99％），并且该复合膜在水处理应用中具有良好的潜力。