Novel CuO–SiO2 nanocomposites: synthesis, kinetics, recyclability, high stability and photocatalytic efficiency for Rose Bengal dye removal

IF 1.6 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Transition Metal Chemistry Pub Date : 2024-02-26 DOI:10.1007/s11243-024-00574-x

Ahlam Hacine Gharbi, Hadia Hemmami, Salah Eddine Laouini, Abderrhmane Bouafia, Ilham Ben Amor, Soumeia Zeghoud, Mohammed Taher Gherbi, Asma Ben Amor, Fahad Alharthi, Johar Amin Ahmed Abdullah

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Abstract

A novel CuO–SiO₂ nanoadsorbent, incorporating copper oxide (CuO) and silicon dioxide (SiO₂), has been successfully synthesized using three distinct preparation processes: Mode-A (solution and solution), Mode-B (solution and nanoparticles), and Mode-C (nanoparticles and nanoparticles). The investigation focuses on evaluating the efficiency of the CuO–SiO₂ nanoadsorbent, considering its synthesis process, reusability, and sustained performance over time, particularly in the removal of Rose Bengal dye. Characterization results revealed the formation of CuO–SiO₂ nanocomposites structure irregular shapes morphology across all three-preparation processes. The average particle sizes for Mode-A, Mode-B, and Mode-C nanocomposites were determined as 18.1 nm, 15.6 nm, and 14.8 nm, respectively. Furthermore, the band gap energies of the CuO–SiO₂ nanocomposites were measured at 2.2 eV, 1.8 eV, and 3.29 eV for Mode-A, Mode-B, and Mode-C, respectively. Remarkably, the CuO–SiO₂ nanocomposite prepared using Mode-B demonstrated superior photocatalytic activity in degrading the anionic dye Rose Bengal, achieving a degradation coefficient of 84.8%. In comparison, CuO NPs, tested under the same experimental conditions (120 min contact time, pH = 7, temperature of 25 °C, and solar light irradiation), achieved a degradation coefficient of 78.8%. These findings highlight the potential of the CuO–SiO₂ nanoadsorbent, particularly when synthesized via Mode-B, for effective and environmentally friendly dye degradation applications.

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新型 CuO-SiO2 纳米复合材料：用于去除玫瑰红染料的合成、动力学、可回收性、高稳定性和光催化效率

采用三种不同的制备工艺，成功合成了一种新型氧化铜-二氧化硅纳米吸附剂，其中包含氧化铜（CuO）和二氧化硅（SiO2）：模式 A（溶液和溶液）、模式 B（溶液和纳米颗粒）和模式 C（纳米颗粒和纳米颗粒）。研究重点是评估 CuO-SiO2 纳米吸附剂的效率，考虑其合成过程、可重复使用性和长期持续性能，特别是在去除玫瑰红染料方面。表征结果表明，在所有三种制备工艺中都形成了不规则形状形态的 CuO-SiO2 纳米复合材料结构。模式 A、模式 B 和模式 C 纳米复合材料的平均粒径分别为 18.1 nm、15.6 nm 和 14.8 nm。此外，模式 A、模式 B 和模式 C 的 CuO-SiO2 纳米复合材料的带隙能分别为 2.2 eV、1.8 eV 和 3.29 eV。值得注意的是，使用模式 B 制备的 CuO-SiO2 纳米复合材料在降解阴离子染料 Rose Bengal 方面表现出卓越的光催化活性，降解系数达到 84.8%。相比之下，在相同的实验条件下（接触时间 120 分钟，pH=7，温度 25 °C，太阳光照射）测试的 CuO NPs 的降解系数为 78.8%。这些发现凸显了 CuO-SiO2 纳米吸附剂（尤其是通过模式 B 合成的吸附剂）在有效和环境友好型染料降解应用方面的潜力。

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来源期刊

Transition Metal Chemistry 化学-无机化学与核化学

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

1.3 months

期刊介绍： Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc. Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.