Hollow Co3O4 nanospheres modified with RuCl3 as peroxidase mimics for sensitive determination of sulfide ions at neutral pH

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-09-05 DOI:10.1039/d4en00569d

Daqing Chen, Minghui Li, Wanzhu Wang, Danhua Ge, Xiaojun Chen

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Abstract

Developing high-performance nanozymes at neutral pH is extremely necessary for the application of biological and water environmental systems. RuCl3 modified hollow Co3O4 nanospheres (Ru3+-Co3O4 HNSs) were utilized to establish a colorimetric sensor for selective determination of sulfide ions (S2-). The hollow Co3O4 nanospheres after doping of Ru3+ provide large surface area and more active sites, thereby boosting the electron transport and the affinity to the substrates. Specifically, the as-prepared Ru3+-Co3O4 HNSs exhibited remarkable peroxidase-like (POD-like) activity, which can catalyze colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxTMB at neutral pH condition. Furthermore, the Ru3+-Co3O4-based colorimetric sensor achieved a wide linear range (0.5-20 μM) and a low detection limit (0.051 μM) for S2- ions concentration, as well as good selectivity, reproducibility and practicability in sewage water. This research aims to boost the accuracy of S2- detection and shed light on application prospects in the water environmental fields.

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用 RuCl3 修饰的中空 Co3O4 纳米球作为过氧化物酶模拟物，用于在中性 pH 值下灵敏测定硫化物离子

开发中性 pH 值的高性能纳米酶对生物和水环境系统的应用极为必要。研究人员利用 RuCl3 修饰的空心 Co3O4 纳米球（Ru3+-Co3O4 HNSs）建立了一种选择性测定硫离子（S2-）的比色传感器。掺杂 Ru3+ 后的空心 Co3O4 纳米球具有较大的比表面积和更多的活性位点，从而提高了电子传输能力和与基底的亲和力。具体而言，制备的 Ru3+-Co3O4 HNS 具有显著的过氧化物酶样（POD-like）活性，可在中性 pH 条件下将无色的 3,3′,5,5′-四甲基联苯胺（TMB）催化成蓝色的 oxTMB。此外，基于 Ru3+-Co3O4 的比色传感器实现了 S2- 离子浓度的宽线性范围（0.5-20 μM）和低检测限（0.051 μM），并且在污水中具有良好的选择性、重现性和实用性。该研究旨在提高 S2- 检测的准确性，并探索其在水环境领域的应用前景。

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

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.