Novel wood membrane decorated with covalent organic frameworks and palladium nanoparticles for reduction of aromatic organic contaminants
Novel wood membrane decorated with covalent organic frameworks and palladium nanoparticles for reduction of aromatic organic contaminants
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DOI：
10.1016/j.seppur.2023.124112
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发表时间：
2023-05
影响因子：
8.6
通讯作者：
Ziwei Cui;Jianfei Wu;Tiantian Wu;Yaning Xu;Haoran Li;Yang Yu;Lixing Kang;Yahui Cai;Jianzhang Li;Dan Tian
中科院分区：
文献类型：
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作者：
Ziwei Cui;Jianfei Wu;Tiantian Wu;Yaning Xu;Haoran Li;Yang Yu;Lixing Kang;Yahui Cai;Jianzhang Li;Dan Tian
随着工业的发展，环境污染日益严重。从废水中去除污染物仍然是环境修复的一个重要挑战。然而，许多具有优异性能的纳米材料都是粉末形式，这限制了它们的实际应用。为了克服这些问题，我们开发了一种用共价有机框架（COFs）和钯纳米粒子（Pd NPs）装饰的三维（3D）木膜（Pd@COF/wood），用于有效去除芳香族有机污染物。具有较大比表面积的COF可作为固定化Pd - NPs的载体，提高其催化活性。由于Pd@COF/wood具有沿木材生长方向的细长且部分排列的通道，因此对4-硝基苯酚（4-NP）和亚甲基蓝（MB）的还原具有优异的催化效率，反应速率常数分别为0.72和0.85 min−1。作为过滤膜，Pd@COF/木膜的MB降解效率达到98%以上，其渗透率为1.57 × 104L·m−2·h−1·bar−1。同时，得到的Pd@COF/木材具有优异的可回收性和油水分离能力。我们认为Pd@COF/木材对环境修复具有重要意义，并且该合成策略适用于建立更多多功能杂化纳米材料，这些纳米材料来源于其他COFs和NPs进行催化。
With the development of industry, environmental pollution has become increasingly serious. The removal of contaminants from wastewater remains an important challenge for environmental remediation. However, many nanomaterials with excellent properties are in powder form, which limits their practical application. To overcome these issues, we have developed a three-dimensional (3D) wood membrane (Pd@COF/wood) decorated with covalent organic frameworks (COFs) and palladium nanoparticles (Pd NPs) for the effective removal of aromatic organic pollutants. The COF with a large specific surface area can be used as support for immobilizing Pd NPs to improve catalytic activity. Benefiting from the elongated and partially aligned channels along the direction of the wood growth, the Pd@COF/wood displays superior catalytical efficiency for the reduction of 4-nitrophenol (4-NP) and methylene blue (MB) with the reaction rate constants of 0.72 and 0.85 min−1, respectively. As the filter membrane, the MB degradation efficiency of the Pd@COF/wood membrane reaches over 98 % with a permeance of 1.57 × 104L·m−2·h−1·bar−1. Meanwhile, the resulting Pd@COF/wood possesses exceptional recyclability and oil–water separation ability. We believe that the Pd@COF/wood is of great significance for environmental remediation, and the synthetic strategy is applicable to establish more multifunctional hybrid nanomaterials, which derive from other COFs and NPs for catalysis.