PtNPs/Ti3C2TxNR Nanozyme‐Enabled Portable Colorimetric Platform for Ultrasensitive Hexavalent Chromium Monitoring

IF 4.8 3区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Annals of the New York Academy of Sciences Pub Date : 2025-10-03 DOI:10.1111/nyas.70106

Mingjie Wei, Rong Liu, Linxin Zheng, Junzhuo Liu, Yinhui Yi, Quan Wang, Yingbao Ou

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引用次数: 0

Abstract

Hexavalent chromium (Cr⁶⁺) is a persistent pollutant in industrial wastewater, and its detection remains challenging due to the inherent limitations of conventional methods in sensitivity, field applicability, and cost. To overcome these challenges, we established a highly sensitive colorimetric sensing system based on a rationally designed nanocomposite material. Surface‐reactive Ti3C2Tx nanoribbons (Ti3C2TxNR) were successfully synthesized by controllable alkaline treatment of Ti3C2Tx nanosheets, followed by the deposition of platinum nanoparticles to form PtNPs/Ti3C2TxNR hybrids with peroxidase‐like catalytic activity. The detection mechanism of this system is based on the competitive interaction between Cr⁶⁺ and 8‐hydroxyquinoline (8‐HQ), which regulates the colorimetric response of 3,3′,5,5′‐tetramethylbenzidine (oxTMB). The colorimetric system exhibits a good linear response in the concentration range of 5 nM to 10 µM, with a detection limit of 0.52 nM, demonstrating excellent sensitivity. Importantly, to enhance the applicability for on‐site detection, a paper‐based platform was further developed, which maintains high sensitivity while offering portability, rapid response, and visual readout. Compared with traditional instrument‐dependent methods, this platform generates a concentration‐dependent colorimetric response visible to the naked eye and offers significant advantages in simplifying operation, reducing detection costs, and improving field applicability, providing a practical and effective solution for the efficient detection of Cr⁶⁺.

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用于超灵敏六价铬监测的PtNPs/Ti3C2TxNR纳米酶激活便携式比色平台

六价铬（Cr 6 +）是工业废水中的持久性污染物，由于传统方法在灵敏度、现场适用性和成本等方面的固有局限性，其检测仍然具有挑战性。为了克服这些挑战，我们建立了一个基于合理设计的纳米复合材料的高灵敏度比色传感系统。通过对Ti3C2Tx纳米片进行可控碱性处理，成功合成了表面反应性Ti3C2Tx纳米带（Ti3C2TxNR），并沉积了纳米铂，形成了具有过氧化物酶样催化活性的PtNPs/Ti3C2TxNR杂化体。该体系的检测机制是基于Cr 6 +与8‐羟基喹啉（8‐HQ）的竞争相互作用，调节3,3 ‘,5,5 ’‐四甲基联苯胺（oxTMB）的比色响应。该比色系统在5 nM ~ 10µM的浓度范围内具有良好的线性响应，检出限为0.52 nM，具有良好的灵敏度。重要的是，为了提高现场检测的适用性，进一步开发了基于纸张的平台，该平台在保持高灵敏度的同时提供便携性，快速响应和视觉读数。与传统仪器依赖方法相比，该平台产生了肉眼可见的浓度依赖比色响应，在简化操作、降低检测成本、提高现场适用性等方面具有显著优势，为Cr 6 +的高效检测提供了实用有效的解决方案。

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

Annals of the New York Academy of Sciences 综合性期刊-综合性期刊

CiteScore

11.00

自引率

1.90%

发文量

193

审稿时长

2-4 weeks

期刊介绍： Published on behalf of the New York Academy of Sciences, Annals of the New York Academy of Sciences provides multidisciplinary perspectives on research of current scientific interest with far-reaching implications for the wider scientific community and society at large. Each special issue assembles the best thinking of key contributors to a field of investigation at a time when emerging developments offer the promise of new insight. Individually themed, Annals special issues stimulate new ways to think about science by providing a neutral forum for discourse—within and across many institutions and fields.