基于沉积在聚氨酯泡沫上的 GO-ZnO 纳米粒子平台的用于亚甲基蓝降解的高效光催化剂。

Highly Efficient Photocatalysts for Methylene Blue Degradation Based on a Platform of Deposited GO-ZnO Nanoparticles on Polyurethane Foam.

机构信息

Building Physics and Environment Institute, Housing & Building National Research Center (HBRC), Dokki, Giza 12311, Egypt.

Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), Suez Desert Road, El-Sherouk City, Cairo 11837, Egypt.

出版信息

Molecules. 2022 Dec 23;28(1):108. doi: 10.3390/molecules28010108.

The demand for reactive dyes in industries has increased rapidly in recent years, and producing a large quantity of dye-containing effluent waste contaminates soils and water streams. Current efforts to remove these harmful dyes have focused on utilizing functionalized nanomaterials. A 3D polyurethane foam loaded with reduced graphene oxide (rGO) and ZnO nanocomposite (PUF/rGO/ZnO) has been proposed as an efficient structural design for dye degradation under the influence of visible light. The proposed structure was synthesized using a hydrothermal route followed by microwave irradiation. The resultant 3D PUF/rGO/ZnO was examined and characterized by various techniques such as XRD, FTIR, SEM, EDAX, BET, and UV-visible spectroscopy. SEM data illustrated that a good dispersion and embedment of the rGO/ZnO NPs within the PUF matrix occurred. The adsorption capacity for neat PUF showed that around 20% of the Methylene blue (MB) dye was only adsorbed on its surface. However, it was found that an exceptional adsorption capacity for MB degradation was observed when the rGO/ZnO NPs inserted into the PUF, which initially deteriorated to ~ 70 % of its initial concentration. Notably, the MB dye was completely degraded within 3 h.

近年来，工业界对反应性染料的需求迅速增加，大量含染料的废水废物污染了土壤和水流。目前，去除这些有害染料的努力集中在利用功能化纳米材料上。一种负载还原氧化石墨烯（rGO）和氧化锌纳米复合材料（PUF/rGO/ZnO）的 3D 聚氨酯泡沫被提出作为在可见光影响下进行染料降解的有效结构设计。所提出的结构是使用水热法合成的，然后进行微波辐射。通过 XRD、FTIR、SEM、EDAX、BET 和 UV-可见光谱等多种技术对所得的 3D PUF/rGO/ZnO 进行了检查和表征。SEM 数据表明，rGO/ZnO NPs 在 PUF 基体中得到了良好的分散和嵌入。纯 PUF 的吸附容量表明，约 20%的亚甲蓝（MB）染料仅吸附在其表面。然而，当 rGO/ZnO NPs 插入 PUF 时，观察到对 MB 降解的异常吸附容量，其初始浓度降低到初始浓度的约 70%。值得注意的是，MB 染料在 3 小时内完全降解。