Exploring yellow emissive polyethylenimine functionalized carbon dots for sensing and removal of chromium ions in aqueous media

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

Materials Research Bulletin Pub Date : 2025-04-23 DOI:10.1016/j.materresbull.2025.113509

Z. Nawas Sherif, K. Anitha

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Abstract

The present study addresses the yellow emissive polyethylenimine functionalized carbon dots (YPC) for recognizing and removing pernicious chromium (Cr³⁺⁾ ions from aqueous solutions. To sense and remove the Cr³⁺ ions in this case, YPC functions as both an adsorbent and a fluorescent sensor using the adsorption method and fluorescence quenching (Turn-Off), respectively. A successful optimization of the material YPCconcerning certain parameters, such as pH, time, YPC concentration, and metal ion concentration, has resulted in significant sensitivity and removal efficiency. The material has a high removal efficiency and a low detection limit of 0.04 ppm for Cr³⁺ions. Cr³⁺ ions are selected based on their fluorescence reaction to the material. The structural, optical, elemental composition and vibrational properties of YPC are examined, and the adsorption isotherm, kinetics and its mechanism of detection and elimination are examined. Lastly, the material is used with actual ambient water samples to assess its practicality.

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探索黄色发光聚乙烯亚胺功能化碳点对水介质中铬离子的传感和去除

本研究研究了黄色发光聚乙烯亚胺功能化碳点（YPC）识别和去除水溶液中有害的铬（Cr3+）离子。在这种情况下，为了检测和去除Cr3+离子，YPC分别使用吸附法和荧光猝灭（关闭）法作为吸附剂和荧光传感器。在pH、时间、YPC浓度和金属离子浓度等参数的影响下，对材料YPC进行了优化，获得了显著的灵敏度和去除效率。该材料对Cr3+离子的去除率高，检出限低至0.04 ppm。Cr3+离子的选择是基于它们对材料的荧光反应。考察了YPC的结构、光学、元素组成和振动性能，并对其吸附等温线、动力学及其检测和消除机理进行了研究。最后，将该材料与实际环境水样进行对比，验证其实用性。

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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.