高效溶液生长的 CuXO/Cu 纳米结构用于催化还原硝基烯烃和利用亚甲基蓝的时钟反应目视比色法检测 Zn2+

IF 2.2 4区 化学 Q2 Engineering Chemical Papers Pub Date : 2024-09-25 DOI:10.1007/s11696-024-03707-9
Fabeena Jahan Jaleel, Shahanaz Maikarantakath Velikakath, Shajesh Palantavida, Baiju Kizhakkekilikoodayil Vijayan
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引用次数: 0

摘要

在环境修复领域,催化水污染物转化为无害环境产品已成为一项极具前景的技术。在金属和金属氧化物纳米粒子中,铜/氧化铜纳米粒子是一种理想的催化剂,可以减少有害的水生污染物,从而保护环境。本研究采用简单的化学氧化法合成了 Cu(OH)2 纳米线,然后将其在不同温度的氩气环境中退火。退火时,Cu(OH)2 会转化为氧化物形式,即 CuO 和/或 Cu2O。研究了合成的纳米材料在 NaBH4 存在下催化对硝基苯酚(p-NP)和对硝基苯胺(p-NA)等有机污染物转化为对氨基苯酚(p-AP)和对苯二胺(p-PDA)的意义,并比较了它们的催化活性,发现对硝基苯酚和对苯二胺的速率常数分别为 0.016 s-1 和 0.021 s-1。由于比表面积增大,改善了电荷载流子的分离和吸附,CuO/Cu2O 杂化纳米线具有优异的催化性能,能在几分钟内将这些有害污染物转化为有用的产物。此外,CuO/Cu2O 杂化纳米线形成的异质结还能有效催化 "时钟反应",即在无色的白亚甲基蓝和蓝色的亚甲基蓝之间进行周期性可逆切换反应。所开发的纳米复合材料的这一特性已被用于 Zn2+ 离子的目视比色检测,检测限高达 53 nM,灵敏度高。通过 X 射线衍射、拉曼和扫描电子显微镜分析获得了形态和表面分析,并通过紫外-可见光谱研究了反应动力学。对合成催化剂的可回收性进行了五个周期的研究,结果表明该催化剂性能稳定,五个周期后对-NP 的转化率达到 95%,对-NA 的转化率达到 93%。
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Highly efficient solution grown CuXO/Cu nanostructures for catalytic reduction of nitroarenes and visual colorimetric detection of Zn2+ using clock reaction of methylene blue

Catalytic conversion of water pollutants into environmentally benign products has emerged as a highly promising technique in the realm of environmental remediation. Among metal and metal oxide nanoparticles, copper/copper oxide nanoparticles serve as an ideal catalyst to reduce hazardous aquatic pollutants in order to protect the environment. In the present study, a simple chemical oxidation method was used for the synthesis of Cu(OH)2 nanowire, which was then annealed in argon atmosphere at different temperatures. On annealing, Cu(OH)2 gets transformed into oxide forms, CuO and/or Cu2O. The significance of the synthesized nanomaterial for the catalytic conversion of organic pollutants like para-nitrophenol (p-NP) and para-nitroaniline (p-NA), to para-aminophenol (p-AP) and para-phenylenediamine (p-PDA), respectively, in the presence of NaBH4 was studied and their catalytic activities were compared, and the rate constants were found to be 0.016 s−1 and 0.021 s−1 for p-NP and p-NA respectively. Due to the increased surface area, which improves charge carrier separation and adsorption, the CuO/Cu2O hybrid nanowires established excellent catalytic behavior for the conversion of these harmful pollutants into useful products within a few minutes. In addition to this, the heterojunction of CuO/Cu2O hybrid nanowires formed are effectively catalyze the “clock reaction,” which is a periodic reversible switching of reactions between colorless leucomethylene blue and blue colored methylene blue. This property of the developed nanocomposite has been used in the visual colorimetric detection of Zn2+ions, with high limit of detection of 53 nM and high sensitivity. Morphology and surface analysis were obtained by X ray diffraction, Raman, and Scanning Electron Microscopic analysis and the reaction kinetics were studied by UV–visible spectroscopy. The recyclability of the synthesized catalyst was investigated over five cycles, and it maintained consistent performance, achieving 95% conversion efficiency for p-NP and 93% for p-NA after the five cycles.

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来源期刊
Chemical Papers
Chemical Papers Chemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍: Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.
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