Polyvinylidene fluoride supported Ce-BDC thin film towards Cr(VI) photoreduction

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2025-05-01 Epub Date: 2025-01-16 DOI:10.1016/j.materresbull.2025.113304

Zahra Valizadeh, Seyed Mohammad Hosseini, Rezvan Cheraghi, Vahid Safarifard

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Abstract

Efficient and recyclable water treatment technologies are crucial for the practical removal of Cr(VI) from wastewater. While metal-organic frameworks are widely used in water treatment due to their stability and multiple active sites, their powdered form presents challenges in reclamation, secondary pollution, and aggregation. This study addresses these issues by successfully loading Ce-based MOF onto a polyvinylidene fluoride (PVDF) film using the phase inversion method, resulting in a highly efficient photocatalyst for Cr(VI) reduction. The Ce-BDC/PVDF composite film offers two distinct advantages over powdered forms: enhanced process efficiency and stability, and minimized catalyst loss and recovery energy requirements. The prepared photocatalyst demonstrated the ability to reduce 95.99 % of chromium in solution within 120 min at pH 2 under visible light irradiation. Comprehensive characterization using XRD, SEM, EDS mapping, FT-IR, PL, and UV–vis analysis confirmed the formation of a composite structure.

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聚偏氟乙烯负载Ce-BDC薄膜对Cr（VI）光还原的研究

高效、可循环的水处理技术是实际去除废水中铬（VI）的关键。金属有机骨架由于其稳定性和多活性位点而广泛应用于水处理，但其粉状结构在回收、二次污染和聚集等方面存在挑战。本研究通过使用相转化方法成功地将ce基MOF加载到聚偏氟乙烯（PVDF）薄膜上，从而得到了一种高效的Cr（VI）还原光催化剂，从而解决了这些问题。与粉末形式相比，Ce-BDC/PVDF复合膜具有两个明显的优势：提高工艺效率和稳定性，最大限度地减少催化剂损失和回收能量需求。所制备的光催化剂在可见光照射下，在pH为2的条件下，在120 min内可将溶液中的铬还原95.99%。通过XRD、SEM、EDS图谱、FT-IR、PL和UV-vis分析等综合表征证实了复合结构的形成。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.