生态友好型碳量子点作为双功能荧光探针，用于检测六价铬和光学温度计

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-02-21 DOI:10.1016/j.materresbull.2025.113394

Avinash Kumar , Ritu , Ishant Kumar , Sandeep Kumar , Arvind K Gathania

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引用次数: 0

摘要

以孜然种子为原料，采用水热法合成了碳量子点（CQDs），并用ir - tem、XPS、FTIR、RAMAN、UV-Vis和PL光谱对其进行了表征。研究了CQDs在高盐条件下的光稳定性、储存时间、紫外光和白光、pH值和不同溶剂下的光稳定性。它们对Cr6+离子具有选择性和敏感性，因此它们作为Cr6+离子传感的荧光探针的潜力正在研究中。电流离子传感器在水溶液中的最低检出限为8.3 μM。PL强度的温度依赖性也被用来演示热敏度为0.658°C-1的温度传感器。该研究对利用天然前驱体合成CQDs进行温度传感和金属离子检测技术的研究具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Eco-friendly carbon quantum dots as a bi-functional fluorescent probe for Cr (VI) detection and optical thermometry

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Eco-friendly carbon quantum dots as a bi-functional fluorescent probe for Cr (VI) detection and optical thermometry

Carbon quantum dots (CQDs) from cumin (Cuminum cyminum) seeds have been synthesized using the hydrothermal technique and were characterized by HR-TEM, XPS, FTIR, RAMAN, UV–Vis, and Photoluminescence (PL) spectroscopy. The photostability of CQDs was investigated through various tests such as in high saline conditions, with their storage time, under UV and white light exposure, pH values, and different solvents. They were found selective and sensitive to Cr⁶⁺ ions, so their potential as a fluorescent probe for Cr⁶⁺ ions sensing is being studied. The Lowest limit of detection (LOD) value for the current ion sensor in an aqueous solution is 8.3 μM. The temperature dependence of PL intensity has also been utilized to demonstrate a temperature sensor with a thermal sensitivity of 0.658 °C^-1. This study contributes significantly to temperature sensing and metal ions detection technologies by utilizing CQDs synthesized from natural precursors.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.