A highly efficient, rapid, room temperature synthesis method for coal-based water-soluble fluorescent carbon dots and its use in Fe3+ ion detection

IF 5.7 3区材料科学 Q2 Materials Science

New Carbon Materials Pub Date : 2023-12-01 DOI:10.1016/S1872-5805(23)60706-1

Zhong-fu Cheng , Xue-yan Wu , Lei Liu , Long He , Zu-guo Yang , Chang Cao , Yan Lu , Ji-xi Guo

引用次数: 0

Abstract

We report a method for the of coal-based fluorescent carbon dots (CDs) at room temperature using a mixture of hydrogen peroxide (H₂O₂) and formic acid (HCOOH) as the oxidant instead of concentrated HNO₃ or H₂SO₄. The CDs have an excitation dependent behavior with a high quantum yield (QY) of approximately 7.2%. The CDs are water soluble and have excellent photo-stability, good resistance to salt solutions, and are insensitive to pH in a range of 2.0-12.0. The CDs were used as a very sensitive probe for the turn-off sensing of Fe³⁺ ion with a detection limit as low as 600 nmol/L and a detection range from 2 to 100 μmol/L. This work provides a way for the high value-added utilization of coal.

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煤基水溶性荧光碳点的高效、快速、室温合成方法及其在 Fe3+ 离子检测中的应用

我们报告了一种在室温下利用过氧化氢（H2O2）和甲酸（HCOOH）的混合物作为氧化剂而不是浓 HNO3 或 H2SO4 来制备煤基荧光碳点（CD）的方法。这种 CD 具有与激发相关的特性，量子产率（QY）高达约 7.2%。这种光盘可溶于水，具有出色的光稳定性和良好的耐盐溶液性，对 pH 值（2.0-12.0）不敏感。这种 CD 被用作一种非常灵敏的探针，用于 Fe3+ 离子的关断感应，其检测限低至 600 nmol/L，检测范围为 2 至 100 μmol/L。这项工作为煤炭的高附加值利用提供了一条途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Carbon Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.10

自引率

8.80%

发文量

3245

审稿时长

5.5 months

期刊介绍： New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.