Wang Rong, Cao Hongyan
College of Chemical Engineering, Sichuan University of Science and Engineering Zigong 643000 China.
RSC Adv. 2021 Dec 14;11(63):39797-39803. doi: 10.1039/d1ra05706e. eCollection 2021 Dec 13.
In this paper, a simple and cost-efficient strategy was used to construct a uniform Au NPs distribution on the surface of flexible filter paper for the detection of benzidine. Taking full advantage of the adsorption properties of filter paper, small gold nanoparticles were adsorbed onto its surface as gold seeds, and subsequently grown by electroless plating to form a highly uniform distribution of Au NPs substrates. By changing the electroless plating time, an optimal substrate was obtained. The as-prepared substrate exhibited satisfactory sensitivity with a low detection limit of 10 M for 4-ATP, and good reproducibility and homogeneity. Furthermore, the as-prepared substrates were successfully used for the detection of benzidine in environmental water, with a minimum detection concentration as low as 0.1 ppm and recoveries in the range of 92.4 to ∼108.5%. This study indicated that filter paper-based SERS substrates have great potential value in the detection of environmental organic pollutants.
在本文中，采用了一种简单且成本效益高的策略，在柔性滤纸表面构建均匀的金纳米粒子分布以检测联苯胺。充分利用滤纸的吸附特性，将小金纳米颗粒吸附到其表面作为金种子，随后通过化学镀生长形成高度均匀分布的金纳米粒子基底。通过改变化学镀时间，获得了最佳基底。所制备的基底对4-氨基硫酚表现出令人满意的灵敏度，检测限低至10 M，并且具有良好的重现性和均匀性。此外，所制备的基底成功用于环境水中联苯胺的检测，最低检测浓度低至0.1 ppm，回收率在92.4%至约108.5%范围内。该研究表明，基于滤纸的表面增强拉曼散射基底在环境有机污染物检测中具有巨大的潜在价值。
