Poria cocos-derived carbon dots for parallel detection of Cr6+/Fe3+ in complex environments with superior sensitivity

IF 4.3 2区化学 Q1 SPECTROSCOPY Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2024-10-26 DOI:10.1016/j.saa.2024.125346

Yuanping Luo , Song Yuan , Minjie Zhu , Zongwen Zhang , Beijun Cheng , Wenjun Xu , Zhili Peng

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Abstract

Multifunctional sensor capable of parallel sensing is of great importance thanks to their wide applications and great practicality. In this report, Poria cocos-derived carbon dots (CDs) were adopted for the development of multifunctional sensor for the parallel detection of Cr⁶⁺ and Fe³⁺ with superior sensitivity and applicability. Specifically, extremely low limit of detection (LOD) of 1.07 × 10⁻³ nM and 1.98 × 10⁻³ nM were achieved for Cr⁶⁺ and Fe³⁺, respectively. Systematic mechanism explorations revealed that the highly sensitive detection of Cr⁶⁺ was attributed to an efficient inner filter effect (IFE), while the sensing of Fe³⁺ was realized due to a strong static quenching process. Furthermore, the assay was found to be extremely versatile, achieving the reliable detection of Cr⁶⁺ and Fe³⁺ in multiple natural water environments and even biological environment. Utilizing the different reactions of Cr⁶⁺ and Fe³⁺ towards masking reagents, a logic gate that could effectively eliminate the mutual interference of Cr⁶⁺ and Fe³⁺ was successfully designed.

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茯苓衍生碳点用于并行检测复杂环境中的 Cr6+/Fe3+，灵敏度极高。

能够并行传感的多功能传感器因其广泛的应用性和实用性而具有重要意义。本报告采用茯苓衍生的碳点（CD）开发了多功能传感器，用于平行检测 Cr6+ 和 Fe3+，具有极高的灵敏度和适用性。具体而言，Cr6+ 和 Fe3+ 的检出限（LOD）分别为 1.07 × 10-3 nM 和 1.98 × 10-3 nM。系统的机理探索表明，对 Cr6+ 的高灵敏度检测归因于高效的内滤波效应（IFE），而对 Fe3+ 的检测则归因于强大的静态淬灭过程。此外，该检测方法还具有极强的通用性，可在多种自然水环境甚至生物环境中实现对 Cr6+ 和 Fe3+ 的可靠检测。利用 Cr6+ 和 Fe3+ 对掩蔽试剂的不同反应，成功设计出一种能有效消除 Cr6+ 和 Fe3+ 相互干扰的逻辑门。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.