Synthesis of CuO@ZnO Nanoparticle Core–Shell Formed via Laser Ablation in Liquid for Photocatalytic Applications

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL
Salah M. Abdul Aziz, Uday M. Nayef, Mohammed Rasheed
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Abstract

This research study specifically examines the CuO@ZnO nanoparticle core–shell colloidal solution that is produced using Nd: YAG laser ablation. The laser used has pulse energies of 900, 700, and 500 mJ, a wavelength of 1064 nm, and repeated pulses of 200. This work demonstrated the characteristics of a colloidal solution containing CuO@ZnO NP core–shell deposited onto Si substrates using the drop-casting process. The TEM, SEM, XRD, and UV–vis spectroscopy techniques were used to investigate the morphological, shape, optical, and structural characteristics of the synthesized CuO@ZnO NP core–shell. The XRD analysis reveals that the CuO@ZnO NP core–shell has sizes ranging from 30 to 93 nm approximately. The nanoparticle core–shell exhibited a combination of spherical and irregular shapes with sizes ranging from 30 to 90 nm. The nanoparticle size appeared to be influenced by the variation in laser pulse energy, as evidenced in SEM pictures. The TEM pictures reveal that the core–shell nanoparticles exhibit a particle size distribution with average sizes of 19, 70, and 30 nm for the nanoparticles produced using laser pulses with energy levels of 900, 700, and 500 mJ, respectively. The TEM pictures also exhibit a dark central region of CuO NPs and a comparatively lighter outside region of the ZnO nanoshell, thereby verifying its core–shell structure. Alteration of the laser energy resulted in a noticeable change in the optical energy band gap in the generated samples. The results of the UV–vis test suggested that a change in the energy of the laser pulse caused a change in the energy gap that ranges from 2.6 to 3 eV. The dye degradation capability of CuO@ZnO NP core–shell has been evaluated using methylene blue (MB), an organic dye. The results indicate that all samples exhibited successful degradation using CuO@ZnO NP core–shell with differentiated activity levels. The blue color of the methylene blue solution vanished within 120 min of exposure to illumination when the CuO@ZnO nanoparticles, generated with a laser energy of 900 mJ, were present. The investigation of CuO@ZnO nanoparticles, synthesized through the use of laser pulse energy, demonstrates its potential as a highly effective substance for water purification.

Abstract Image

在液体中通过激光烧蚀合成用于光催化应用的 CuO@ZnO 纳米粒子核壳
本研究特别考察了使用 Nd: YAG 激光烧蚀法生产的 CuO@ZnO 纳米粒子核壳胶体溶液。所使用的激光脉冲能量为 900、700 和 500 mJ,波长为 1064 nm,重复脉冲为 200。这项工作展示了使用滴铸工艺沉积在硅基底上的含有 CuO@ZnO NP 核壳的胶体溶液的特性。利用 TEM、SEM、XRD 和 UV-vis 光谱技术研究了合成的 CuO@ZnO NP 核壳的形态、形状、光学和结构特征。XRD 分析表明,CuO@ZnO NP 核壳的尺寸约为 30 至 93 nm。纳米粒子核壳呈现出球形和不规则形状的组合,尺寸范围为 30 至 90 nm。纳米粒子的尺寸似乎受激光脉冲能量变化的影响,这一点在扫描电镜图片中得到了证明。TEM 照片显示,使用能量为 900、700 和 500 mJ 的激光脉冲产生的核壳纳米粒子呈现出粒度分布,平均粒度分别为 19、70 和 30 nm。TEM 照片还显示,CuO NPs 的中心区域颜色较深,而 ZnO 纳米壳的外部区域颜色相对较浅,从而验证了其核壳结构。激光能量的改变导致生成样品的光能带隙发生了明显变化。紫外可见光测试结果表明,激光脉冲能量的变化会导致能带隙在 2.6 至 3 eV 之间发生变化。使用有机染料亚甲基蓝(MB)评估了 CuO@ZnO NP 核壳的染料降解能力。结果表明,所有样品都成功地利用 CuO@ZnO NP 核壳进行了降解,且活性水平各不相同。当 CuO@ZnO 纳米粒子在 900 mJ 的激光能量下产生时,亚甲基蓝溶液的蓝色在照射 120 分钟内消失。对利用激光脉冲能量合成的 CuO@ZnO 纳米粒子的研究表明,它具有作为一种高效净水物质的潜力。
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
Plasmonics
Plasmonics 工程技术-材料科学:综合
CiteScore
5.90
自引率
6.70%
发文量
164
审稿时长
2.1 months
期刊介绍: Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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