Laghari Gul Naz, Nafady Ayman, Al-Saeedi Sameerah I, Sherazi Syed Tufail H, Nisar Jan, Shah Muhammad Raza, Abro Mohammad I, Arain Munazza, Bhargava Suresh K
National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Nanomaterials (Basel). 2019 Jan 10;9(1):83. doi: 10.3390/nano9010083.
This study involves environmentally friendly synthesis of copper nanoparticles in aqueous medium without inert gas protection, using ranolazine as a capping material. UV-Visible (UV-Vis) spectrometry showed that ranolazine-derived copper nanoparticles (Rano-Cu NPs) demonstrate a localized surface plasmon resonance (LSPR) band at 573 nm with brick-red color under optimized parameters, including pH, reaction time, and concentrations of copper salt, hydrazine hydrate, and ranolazine. The coating of ranolazine on the surface of Cu NPs was studied via Fourier transform infrared (FTIR) spectroscopy. Scanning electron microscopy (SEM) revealed that Rano-Cu NPs consist of spherical particles. X-ray diffraction (XRD) verified that Rano-Cu NPs are crystalline in nature. Atomic force microscopy (AFM) showed that the average size of Rano-Cu NPs was 40 ± 2 nm in the range of 22⁻95 nm. Rano-Cu NPs proved to be highly sensitive as a selective colorimetric sensor for As via color change from brick red to dark green, in the linear range of 3.0 × 10 to 8.3 × 10 M, with an R² value of 0.9979. The developed sensor is simple, cost effective, highly sensitive, and extremely selective for As detection, showing a low detection limit (LDL) of 1.6 × 10 M. The developed sensor was effectively tested for detection of As in some water samples.
本研究涉及在无惰性气体保护的水性介质中，以雷诺嗪作为封端材料，对铜纳米颗粒进行环境友好型合成。紫外可见（UV-Vis）光谱表明，在优化参数（包括pH值、反应时间以及铜盐、水合肼和雷诺嗪的浓度）下，由雷诺嗪衍生的铜纳米颗粒（Rano-Cu NPs）在573 nm处呈现局部表面等离子体共振（LSPR）带，且颜色为砖红色。通过傅里叶变换红外（FTIR）光谱研究了雷诺嗪在Cu NPs表面的包覆情况。扫描电子显微镜（SEM）显示，Rano-Cu NPs由球形颗粒组成。X射线衍射（XRD）证实Rano-Cu NPs本质上是晶体。原子力显微镜（AFM）表明，Rano-Cu NPs的平均尺寸在22⁻95 nm范围内为40 ± 2 nm。Rano-Cu NPs被证明是一种对砷具有高灵敏度的选择性比色传感器，通过颜色从砖红色变为深绿色来检测砷，线性范围为3.0 × 10至8.3 × 10 M，R²值为0.9979。所开发的传感器简单、经济高效、高度灵敏且对砷检测具有极高的选择性，检测限（LDL）低至1.6 × 10 M。所开发的传感器已在一些水样中有效地用于砷的检测。
