High sensitive and discriminating colorimetric assay for S2− overload in adaptogenic herbs utilizing ZnS nanoparticle-enhanced S, N-doped eggshell membrane-derived biochar

IF 5.7 2区化学 Q1 CHEMISTRY, ANALYTICAL

Analytica Chimica Acta Pub Date : 2024-11-05 DOI:10.1016/j.aca.2024.343391

Dapeng Xu , Yanning Zheng , Bimei Xie , Youquan Zhang , Zhangfa Tong , Jianhua Sun , Lixia Sun , Guangzhi Zhou , Dankui Liao

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引用次数: 0

Abstract

Background

With the rapid development of industrialization, the excessive emission of S²⁻ have become increasingly serious, leading to a surge in the content of S²⁻ in nature. Rapid and accurate detection of S²⁻ contamination in natural adaptogens is crucial for food safety. Annually, discarded eggshell waste, rich in organic and inorganic materials, poses environmental risks if landfilled. Utilizing waste eggshell membrane biomass for S²⁻ detection is cost-effective, yet designing biochar materials for sensors requires balancing catalytic enhancement and anti-interference capabilities. Improving the catalytic performance of biochar for colorimetric S²⁻ detection without metal ion interference presents a challenging issue.

Results

We first modified biochar (EBc) derived from waste eggshell membranes using a combination of thiourea and ZnS nanoparticles, fabricating ZnS-decorated, S–N co-doped biochar (ZnS-SN-EBc) nanozymes, which were applied for the colorimetric assay detection of S²⁻ contamination. The addition of thiourea significantly increases the proportion of pyridinic-N in biochar, enhancing the peroxidase-like activity of the nanozyme. The growth of ZnS nanoparticles on the biochar not only enhances the catalytic performance by increasing the S content but also reduces the content of oxidized S, thereby improving resistance to interference. The detection range for S²⁻ was expanded from 0.1 to 45 μM for EBc to 0.05–225 μM for ZnS-SN-EBc, and the limit of detection improved to 0.0397 μM. Additionally, ZnS-SN-EBc significantly enhanced metal ion interference resistance. S²⁻ detection in five types of adaptogenic herbs verified the accuracy and practicality of the colorimetric assay, with recovery rates comparable to national standards.

Significance

We innovatively repurposed waste eggshell membranes to develop a selective and catalytic peroxidase-like nanozyme, ZnS-decorated S–N co-doped biochar (ZnS-SN-EBc). The developed colorimetric assay utilizing ZnS-SN-EBc demonstrates significant potential for the detection of sulfur ions in adaptogenic herbs, thus contributing to both waste resource utilization and the advancement of food safety detection technologies.

Abstract Image

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利用 ZnS 纳米粒子增强的 S、N 掺杂蛋壳膜衍生生物炭，对适应性药材中的 S2- 负荷进行高灵敏度、高分辨比色测定

背景随着工业化的快速发展，S2-的超标排放日益严重，导致自然界中S2-的含量激增。快速准确地检测天然适应剂中的 S2- 污染对食品安全至关重要。每年废弃的蛋壳垃圾富含有机物和无机物，如果填埋会对环境造成危害。利用废弃蛋壳膜生物质进行 S2- 检测具有成本效益，但设计用于传感器的生物炭材料需要平衡催化增强和抗干扰能力。结果我们首先使用硫脲和 ZnS 纳米颗粒对废弃蛋壳膜衍生的生物炭（EBc）进行改性，制备出 ZnS 装饰、S-N 共掺杂的纳米生物炭（ZnS-SN-EBc），并将其应用于 S2- 污染的比色法检测。硫脲的加入大大增加了生物炭中吡啶-N 的比例，增强了纳米酶的过氧化物酶样活性。ZnS 纳米颗粒在生物炭上的生长不仅通过增加 S 的含量提高了催化性能，还降低了氧化 S 的含量，从而提高了抗干扰能力。S2- 的检测范围从 EBc 的 0.1 至 45 μM 扩大到 ZnS-SN-EBc 的 0.05 至 225 μM，检测限提高到 0.0397 μM。此外，ZnS-SN-EBc 还显著增强了抗金属离子干扰能力。我们创新性地将废弃蛋壳膜重新用于开发一种具有选择性和催化作用的过氧化物酶类纳米酶，即 ZnS-Decorated S-N co-doped biochar (ZnS-SN-EBc)。利用 ZnS-SN-EBc 开发的比色测定法在检测适应性中草药中的硫离子方面具有巨大潜力，从而有助于废物资源利用和食品安全检测技术的进步。

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

Analytica Chimica Acta 化学-分析化学

CiteScore

10.40

自引率

6.50%

发文量

1081

审稿时长

38 days

期刊介绍： Analytica Chimica Acta has an open access mirror journal Analytica Chimica Acta: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Analytica Chimica Acta provides a forum for the rapid publication of original research, and critical, comprehensive reviews dealing with all aspects of fundamental and applied modern analytical chemistry. The journal welcomes the submission of research papers which report studies concerning the development of new and significant analytical methodologies. In determining the suitability of submitted articles for publication, particular scrutiny will be placed on the degree of novelty and impact of the research and the extent to which it adds to the existing body of knowledge in analytical chemistry.