Boosting Degradation of Synthetic Dye and Pesticide Residues in Water Using NCDs/FeNH2BDC Photocatalysts

IF 2.8 3区化学 Q2 CHEMISTRY, APPLIED Topics in Catalysis Pub Date : 2024-01-05 DOI:10.1007/s11244-023-01900-w

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Abstract

The presence of contaminants, such as synthetic dyes and herbicides, in water has led to serious environmental and human health problems worldwide. Therefore, the effective removal of pollutants from aquatic environments has attracted considerable attention. The combination of metal-organic frameworks and advanced carbon materials has attracted great attention in many application fields because the hybrid material has many positive properties from both components. In this paper, NCDs/FeNH₂BDC composite was fabricated through in situ synthesis, in which N-containing carbon dots (NCDs) were mixed with MOF precursor solution in different ratios before undergoing the cooling step. It has been demonstrated that introducing a certain amount of N-containing carbon dots affects the characteristic features and improves the photocatalytic performance of the final product. The optimal doping content of N-containing carbon dots in the NCD/FeNH₂BDC composite was determined to be 400 mg. SEM images show that S400 appears as hexagonal micro-axial crystals with an average size of 500 nm. In addition, the S400 catalyst also exhibits excellent photocatalytic activity for the degradation of Rhodamine B at a pH range of 3 to 5. Under optimal conditions, Rhodamine B is achieved within 60 min and the yield Removal reached nearly 100% after 5 cycles. Finally, the efficiency of S400 in treating the active ingredient pretilachlor in pesticides in water is up to 93.08%.

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利用 NCDs/FeNH2BDC 光催化剂促进水中合成染料和农药残留的降解

摘要合成染料和除草剂等污染物在水中的存在导致了全球严重的环境和人类健康问题。因此，有效去除水生环境中的污染物已引起人们的广泛关注。金属有机框架与先进碳材料的结合在许多应用领域都引起了极大的关注，因为这种混合材料具有两种成分的许多积极特性。本文通过原位合成法制备了 NCDs/FeNH2BDC 复合材料，即在冷却步骤之前将含 N 的碳点（NCDs）以不同比例与 MOF 前驱体溶液混合。实验证明，引入一定量的含 N 碳点会影响最终产物的特征，并改善其光催化性能。经测定，NCD/FeNH2BDC 复合材料中含 N 碳点的最佳掺杂量为 400 毫克。扫描电子显微镜图像显示，S400 呈六角形微轴向晶体，平均尺寸为 500 纳米。此外，在 pH 值为 3 至 5 的条件下，S400 催化剂在降解罗丹明 B 方面也表现出优异的光催化活性。在最佳条件下，罗丹明 B 可在 60 分钟内实现降解，5 个循环后的去除率接近 100%。最后，S400 处理水中杀虫剂有效成分前草胺的效率高达 93.08%。

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来源期刊

Topics in Catalysis 化学-物理化学

CiteScore

5.70

自引率

5.60%

发文量

197

审稿时长

2 months

期刊介绍： Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.