Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China.
Talanta. 2025 Jan 1;281:126881. doi: 10.1016/j.talanta.2024.126881. Epub 2024 Sep 20.
The bimetallic nanoparticles have received significant attention in the field of colorimetric sensing, while the majority of the previous methods for synthesizing such nanoparticles typically require the use of reducers and involve highly harsh synthesis conditions. In this work, the AuPt bimetallic nanoparticles (AuPtNPs) decorated TiCTNR nanohybrid (TiCTNR@AuPt) was firstly synthesized in a "two birds with one stone" manner. Innovatively, during the synthesis process, TiCTNR served as both reducing agent and supporting agent to prevent aggregation of bimetallic nanoparticles. Due to the good synergistic effect of AuPtNPs and the strong metal-support interaction between AuPtNPs and TiCTNR, the as-prepared TiCTNR@AuPt exhibited boosted peroxidase (POD)-like activity. In advantage of the exceptional POD-like activity, a cost-effective and sensitive colorimetric sensing platform was fabricated for dipterex detection with a broad linearity of 1.0 ng mL-1.0 μg mL and a low detection limit (0.479 ng mL). The detection of dipterex in insecticide samples also yielded favorable recoveries. Moreover, this approach provided a convenient and effective strategy to design and develop novel nanozymes via a "two birds with one stone" strategy.
双金属纳米粒子在比色传感领域引起了广泛关注，而之前大多数合成此类纳米粒子的方法通常需要使用还原剂，并且涉及苛刻的合成条件。在这项工作中，首次以“一石二鸟”的方式合成了 AuPt 双金属纳米粒子（AuPtNPs）修饰的 TiCTNR 纳米杂化材料（TiCTNR@AuPt）。创新性地，在合成过程中，TiCTNR 既作为还原剂又作为支撑剂，防止了双金属纳米粒子的聚集。由于 AuPtNPs 的协同效应以及 AuPtNPs 和 TiCTNR 之间的强金属-载体相互作用，所制备的 TiCTNR@AuPt 表现出增强的过氧化物酶（POD）样活性。得益于优异的类过氧化物酶活性，构建了一种经济高效且灵敏的比色传感平台，用于检测敌百虫，线性范围为 1.0 ng mL-1.0 μg mL，检测限低至 0.479 ng mL。在杀虫剂样品中检测敌百虫也得到了良好的回收率。此外，该方法通过“一石二鸟”策略为设计和开发新型纳米酶提供了一种便捷有效的策略。
