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Fast fabrication of nanostructured semiconducting oxides by anodic oxidation of brass
Materials Science in Semiconductor Processing ( IF 4.1 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.mssp.2020.105035 Katarzyna Ryczek , Marcin Kozieł , Ewelina Wiercigroch , Kamilla Małek , Magdalena Jarosz , Grzegorz D. Sulka , Leszek Zaraska
Materials Science in Semiconductor Processing ( IF 4.1 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.mssp.2020.105035 Katarzyna Ryczek , Marcin Kozieł , Ewelina Wiercigroch , Kamilla Małek , Magdalena Jarosz , Grzegorz D. Sulka , Leszek Zaraska
Abstract Nanostructured semiconducting oxide layers were synthesized on the surface of alpha brass (CuZn33) by its simple one-step anodic oxidation (anodization) in a strongly alkaline electrolyte (0.1 M NaOH) at various voltages (30–60 V) followed by thermal treatment in air at 200 °C. The morphology of anodic films was studied by FE-SEM, while its composition was confirmed by EDS, XRD, and Raman spectroscopy. All anodic films exhibited a cracked morphology and were composed of particles with a size of less than 100 nm. Although the presence of Zn in the oxide layer was confirmed, especially within the deeper parts of the film, the main component was monoclinic CuO. Band gaps (Eg) of all obtained materials were also estimated from reflectance spectra, and it was found that the higher the potential applied during anodic oxidation, the wider Eg is observed. Therefore, it can be stated that such a simple electrochemical approach can be an effective way for the fabrication of visible-light-driven photocatalysts.
中文翻译:
黄铜阳极氧化快速制备纳米结构半导体氧化物
摘要 通过在强碱性电解液(0.1 M NaOH)中在不同电压(30-60 V)下进行简单的一步阳极氧化(阳极氧化),在 α 黄铜 (CuZn33) 表面合成纳米结构的半导体氧化物层,然后进行热处理。在 200 °C 的空气中。通过FE-SEM研究阳极薄膜的形貌,同时通过EDS、XRD和拉曼光谱确认其组成。所有阳极薄膜都表现出裂纹形态,并且由尺寸小于 100 nm 的颗粒组成。尽管证实了氧化层中存在 Zn,特别是在膜的较深部分,但主要成分是单斜晶 CuO。还从反射光谱估计了所有获得的材料的带隙 (Eg),发现阳极氧化期间施加的电位越高,观察到更宽的 Eg。因此,可以说这种简单的电化学方法是制备可见光驱动光催化剂的有效方法。
更新日期:2020-07-01
中文翻译:
黄铜阳极氧化快速制备纳米结构半导体氧化物
摘要 通过在强碱性电解液(0.1 M NaOH)中在不同电压(30-60 V)下进行简单的一步阳极氧化(阳极氧化),在 α 黄铜 (CuZn33) 表面合成纳米结构的半导体氧化物层,然后进行热处理。在 200 °C 的空气中。通过FE-SEM研究阳极薄膜的形貌,同时通过EDS、XRD和拉曼光谱确认其组成。所有阳极薄膜都表现出裂纹形态,并且由尺寸小于 100 nm 的颗粒组成。尽管证实了氧化层中存在 Zn,特别是在膜的较深部分,但主要成分是单斜晶 CuO。还从反射光谱估计了所有获得的材料的带隙 (Eg),发现阳极氧化期间施加的电位越高,观察到更宽的 Eg。因此,可以说这种简单的电化学方法是制备可见光驱动光催化剂的有效方法。