Real-time visualization of carbon quantum dots transport in homogeneous and heterogeneous porous media

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-09-25 DOI:10.1039/d4en00563e

Ying Zhao, Jian Song, Qingchun Yang, Yuelei Li, Zhuqing Liu, Fan Yang

{"title":"Real-time visualization of carbon quantum dots transport in homogeneous and heterogeneous porous media","authors":"Ying Zhao, Jian Song, Qingchun Yang, Yuelei Li, Zhuqing Liu, Fan Yang","doi":"10.1039/d4en00563e","DOIUrl":null,"url":null,"abstract":"The widespread applications of carbon quantum dots (CQDs) have attracted much attention. This study presents a novel research system to study the transport and retention of CQDs in homogeneous and heterogeneous porous media. The light transmission visualization technique was used to visualize the real-time distribution and transport of CQDs. Results showed that the increase in quartz sand particle size and increased pH significantly enhanced the transport of CQDs. Due to the negative surface charge of CQDs shielded by high IS, the agglomeration of CQDs enhanced the clogging of CQDs. Particularly, significant aggregated fluorescence quenching of CQDs occurred at IS=100 mM and IS=200 mM. In heterogeneous media, the layer structure alteration and preferential flow contribute significantly in the transport of CQDs. Compared to the fine sand layer, most of the CQDs outflow from the coarse sand layer. The breakthrough curves for CQDs transport in porous media can be matched by a simplified Double-Monod model with high accuracy (R2>0.92). Moreover, the DLVO theory and clogging mechanism well explain the environmental behavior of CQDs in 2-D porous media. This study visualized the fate of CQDs in 2-D porous media, enabling us to assess better and predict their environmental risks.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":null,"pages":null},"PeriodicalIF":8.3000,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Materials & Interfaces","FirstCategoryId":"6","ListUrlMain":"https://doi.org/10.1039/d4en00563e","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The widespread applications of carbon quantum dots (CQDs) have attracted much attention. This study presents a novel research system to study the transport and retention of CQDs in homogeneous and heterogeneous porous media. The light transmission visualization technique was used to visualize the real-time distribution and transport of CQDs. Results showed that the increase in quartz sand particle size and increased pH significantly enhanced the transport of CQDs. Due to the negative surface charge of CQDs shielded by high IS, the agglomeration of CQDs enhanced the clogging of CQDs. Particularly, significant aggregated fluorescence quenching of CQDs occurred at IS=100 mM and IS=200 mM. In heterogeneous media, the layer structure alteration and preferential flow contribute significantly in the transport of CQDs. Compared to the fine sand layer, most of the CQDs outflow from the coarse sand layer. The breakthrough curves for CQDs transport in porous media can be matched by a simplified Double-Monod model with high accuracy (R2>0.92). Moreover, the DLVO theory and clogging mechanism well explain the environmental behavior of CQDs in 2-D porous media. This study visualized the fate of CQDs in 2-D porous media, enabling us to assess better and predict their environmental risks.

查看原文本刊更多论文

碳量子点在均相和异相多孔介质中传输的实时可视化

碳量子点（CQDs）的广泛应用引起了广泛关注。本研究提出了一种新颖的研究系统，用于研究碳量子点在均相和异相多孔介质中的传输和保留。研究采用光透射可视化技术来观察 CQDs 的实时分布和迁移。结果表明，石英砂粒径的增大和pH值的升高显著增强了CQDs的迁移。由于 CQDs 的表面负电荷被高 IS 屏蔽，CQDs 的聚集增强了 CQDs 的堵塞。特别是在 IS=100 mM 和 IS=200 mM 时，CQDs 出现了明显的聚集荧光淬灭。在异质介质中，介质层结构的改变和优先流对 CQDs 的迁移有重要作用。与细砂层相比，大部分 CQDs 从粗砂层流出。CQDs 在多孔介质中的迁移突破曲线可以用简化的 Double-Monod 模型精确匹配（R2>0.92）。此外，DLVO 理论和堵塞机制很好地解释了 CQDs 在二维多孔介质中的环境行为。这项研究将 CQDs 在二维多孔介质中的命运可视化，使我们能够更好地评估和预测其环境风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.