Synthetization and Characterization of Zinc Oxide Nanoparticles by X- Ray Diffractometry (XRD), Fourier Transforms, Infra-Red Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Antibacterial Activity Test

Sajid Ullah, Ayesha Gulnaz, Saeed Anwar, Arif Kamal, Husna Wali
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Abstract

Purpose: Nanomaterials with their derivable potentials offer wide obtain ability and have recently aroused much attention for biomedical applications. Nowadays, nanomaterials-based colorimetric sensing is a quickly emerging field of sensing applications. Nanomaterials are considered as the main component of colorimetric determination of hydrogen peroxide to replace the natural enzyme-based sensors because of some associated intrinsic drawbacks. Considering the advantageous properties of ionic liquid (IL) for various applications, significant attention has been made to the use of ionic liquid stabilized metal NPs which may serve as a regulator to enhance the catalytic performance of the metal nanoparticles in the different IL reaction medium. Methodology: The peroxidase-like activity of IL coated metal NPs (IL-MNPs) have been considered for the catalytic oxidation reaction of chromogenic substrate 3,3,5,5- tetramethylbenzidine (TMB) in the presence of H2O2 at an estimated wavelength of 652 nm. Results: The synthesized metal nanoparticles (Ag) were produced using a chemical reduction method. Various characterization techniques like FTIR, UV-Visible spread Reflectance Spectroscopy [UV-VIS DRS], were employed, which verified the structure, nano-size and successful combination of metal dopant ion into the samples. The molecular structure of ionic liquid with varying cations was produced and confirmed by 1H-NMR spectroscopy. The ionic liquid was coated on metal nanoparticles to enhance their conductivity. Unique Contribution to Theory, Practice and Policy: Optimized reaction conditions like pH, temperature and catalyst dosage affect catalytic activity and color sensing properties. The coating of [Min] Ac on Ag achieved low detection limits and colorimetric detection of [Pyr] based Ag.
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通过 X 射线衍射仪 (XRD)、傅立叶变换红外光谱 (FT-IR)、扫描电子显微镜 (SEM) 和抗菌活性测试合成氧化锌纳米粒子并确定其特性
目的:纳米材料及其衍生电位具有广泛的获取能力,最近在生物医学应用方面引起了广泛关注。目前,基于纳米材料的比色传感是一个迅速崛起的传感应用领域。纳米材料被认为是比色测定过氧化氢的主要成分,以取代天然酶传感器,因为后者存在一些相关的内在缺陷。考虑到离子液体(IL)在各种应用中的优势特性,人们开始关注使用离子液体稳定的金属 NPs,它可以作为一种调节剂来提高金属纳米粒子在不同 IL 反应介质中的催化性能。方法:在估计波长为 652 纳米的 H2O2 存在下,考虑了离子液体包覆金属 NPs(IL-MNPs)的过氧化物酶样活性,以催化发色底物 3,3,5,5- 四甲基联苯胺(TMB)的氧化反应。结果采用化学还原法合成了金属纳米颗粒(Ag)。采用傅立叶变换红外光谱、紫外-可见扩散反射光谱[UV-VIS DRS]等多种表征技术,验证了样品的结构、纳米尺寸和金属掺杂离子的成功结合。制备了不同阳离子的离子液体分子结构,并通过 1H-NMR 光谱进行了确认。将离子液体涂覆在金属纳米粒子上可增强其导电性。对理论、实践和政策的独特贡献:pH 值、温度和催化剂用量等反应条件的优化会影响催化活性和颜色传感特性。将[Min] Ac 涂覆在 Ag 上实现了低检测限和基于 Ag 的[Pyr]比色检测。
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