Synthesis of CuO nanosheets on Cu foil via one-step wet chemical process at different reaction temperatures and their photoelectrochemical performance

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Polyhedron Pub Date : 2024-07-19 DOI:10.1016/j.poly.2024.117156

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Abstract

Cupric oxide (CuO) nanostructures were directly grown on copper substrate via a simple one step solution-immersion process. The films were formed by the direct oxidation of copper in aqueous solution containing sodium hydroxide (NaOH) and ammonium persulfate (NH₄)₂S₂O₈. The influence of the reaction temperature on the structural, morphological, optical and photoelectrochemical (PEC) properties of the formed copper compounds nanostructures was investigated. The XRD and Raman spectroscopy results revealed the formation of Cu(OH)₂/CuO composite for the samples prepared at 3 and 25 °C, and pure CuO was obtained for the samples prepared at 45 and 55 °C. The SEM micrographs showed that the formed Cu(OH)₂ and CuO present a nanowire bundles and nanosheet morphology, respectively. The increase of the reaction temperature enhanced the absorbance of the CuO samples in the entire visible region. According to the photoelectrochemical measurements, the increase of the reaction temperature resulted in an improvement of the PEC response. The CuO nanosheets synthesized at 55 °C presents the highest and the most stable PEC response. A reasonable mechanism describing the formation of nanostructured copper compounds at different reaction temperatures is discussed in this paper.

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不同反应温度下一步法湿化学工艺在铜箔上合成氧化铜纳米片及其光电化学性能

氧化铜（CuO）纳米结构是通过简单的一步溶液浸泡工艺直接生长在铜基底上的。铜在含有氢氧化钠（NaOH）和过硫酸铵（NH4）2S2O8 的水溶液中直接氧化形成薄膜。研究了反应温度对所形成的铜化合物纳米结构的结构、形态、光学和光电化学（PEC）特性的影响。XRD 和拉曼光谱结果表明，在 3 ℃ 和 25 ℃ 下制备的样品形成了 Cu(OH)2/CuO 复合材料，而在 45 ℃ 和 55 ℃ 下制备的样品得到了纯 CuO。扫描电镜显微照片显示，形成的 Cu(OH)2 和 CuO 分别呈现纳米线束和纳米片状形态。反应温度的升高提高了 CuO 样品在整个可见光区域的吸光度。光电化学测量结果表明，反应温度的升高改善了 PEC 响应。在 55 °C 下合成的 CuO 纳米片呈现出最高和最稳定的 PEC 响应。本文讨论了在不同反应温度下形成纳米结构铜化合物的合理机制。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.