The role of bio-inspired ZnO nanoparticles in the modification of MIL101(Cr) properties for visible light degradation of phenanthrene

IF 3.4 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysis Communications Pub Date : 2024-02-01 DOI:10.1016/j.catcom.2024.106905

Usman Abubakar Adamu , Noor Hana Hanif Abu Bakar , Anwar Iqbal , Nonni Soraya Sambudi , Zakariyya Uba Zango

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引用次数: 0

Abstract

MIL-101(Cr) metal-organic frameworks and novel zinc oxide-MIL101(Cr) metal organic frameworks (ZnO-MIL101(Cr)) were prepared by hydrothermal technique at 160 °C and 220 °C for photodegradation of phenanthrene (PHE) in visible light. X-ray diffraction (XRD) analysis indicated a reduction in crystallite sizes of ZnO-MIL101(Cr) when compared to MIL101(Cr). However, incorporation of zinc oxide (ZnO) did not disrupt the MIL101(Cr) structure. ZnO-MIL101(Cr) exhibited high BET surface area (>1000 m²/g) when compared to MIL-101(Cr). These composites have lower bandgaps of ∼3.20 eV, than MIL-101(Cr) (3.5 eV). Optical studies reveal that incorporation of ZnO into MIL101(Cr) delays recombination of electron-hole pairs. These factors lead to ZnO-MIL101(Cr) having similar PHE degradation (98%), however within a shorter time when compared to MIL101(Cr). Catalysts followed the pseudo first-order kinetic model with ZnO-MIL101@220 °C having a rate constant of 2.83 × 10⁻² min⁻¹. This is 2.3× and 1.1× higher than ZnO and the respective MIL101(Cr), correspondingly. Scavenging tests reveal that the hydroxyl radical (•OH) is the primary reactive species for PHE degradation. A degradation mechanism is proposed based on this finding.

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生物启发 ZnO 纳米粒子在改变 MIL101(Cr) 性能以实现菲的可见光降解中的作用

通过水热技术在 160 °C 和 220 °C 下制备了 MIL-101(Cr)金属有机框架和新型氧化锌-MIL101(Cr)金属有机框架（ZnO-MIL101(Cr)），用于在可见光下光降解菲（PHE）。X 射线衍射（XRD）分析表明，与 MIL101(Cr)相比，ZnO-MIL101(Cr)的结晶尺寸有所减小。然而，氧化锌（ZnO）的加入并没有破坏 MIL101（Cr）的结构。与 MIL101(Cr)相比，氧化锌-MIL101(Cr)表现出较高的 BET 表面积（大于 1000 m/g）。与 MIL-101(Cr)（3.5 eV）相比，这些复合材料的带隙更低，约为 3.20 eV。光学研究表明，在 MIL101(Cr)中加入氧化锌会延迟电子-空穴对的重组。这些因素导致 ZnO-MIL101(Cr)与 MIL101(Cr)相比，具有相似的 PHE 降解效果（98%），但降解时间更短。催化剂遵循伪一阶动力学模型，ZnO-MIL101@220 ℃ 的速率常数为 2.83 × 10 分钟。这比 ZnO 和相应的 MIL101(Cr)分别高出 2.3 倍和 1.1 倍。清除测试表明，羟基自由基（-OH）是 PHE 降解的主要反应物。根据这一发现，提出了一种降解机制。

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来源期刊

Catalysis Communications 化学-物理化学

CiteScore

6.20

自引率

2.70%

发文量

183

审稿时长

46 days

期刊介绍： Catalysis Communications aims to provide rapid publication of significant, novel, and timely research results homogeneous, heterogeneous, and enzymatic catalysis.