Nanoscale engineering of Sr-doped ZnO nanorods/CuO nanocomposites for the photocatalytic treatment of methylene blue pollutant

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-05-14 DOI:10.1016/j.matchemphys.2025.131009

Ali Tekin , Raşit Aydın , Ümmühan Akın , Osman Kahveci , Abdullah Akkaya , Hüsnü Kara , Bünyamin Şahin

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Abstract

This study investigates the effect of Sr doping on the physical and photocatalytic properties of ZnO nanorods/CuO nanocomposites. Various techniques were applied to understand how Sr doping modifies these films. SEM analysis showed that ZnO and CuO formed structures such as nanorods or nanowires. Sr-doped samples exhibited increased aggregation compared to undoped composites, with Sr doping levels of 2.0 % and 4.0 % leading to more pronounced morphological changes. AFM measurements showed an increase in average roughness from 70.53 nm to 111.83 nm with higher Sr doping levels. XRD analysis showed that the crystallite sizes decreased from 36.20 nm for undoped samples to 31.55 nm and 29.90 nm with 2.0 % and 4.0 % Sr doping, respectively. FTIR Spectroscopy provided insights into the chemical bonding changes induced by Sr doping. The bandgap analysis revealed that Sr doping in the ZnO/CuO nanocomposites enhanced the bandgap energy, with the value increasing from 2.41 eV in the undoped sample to 3.61 eV at 4.0 % Sr doping. Electrical conductivity measurements showed a decrease in total resistance values as the Sr doping ratio increased. The contact resistance values increased from 3.13 × 10⁹ Ω in the un-doped samples to 3.22 × 10⁸ Ω in the 4.0 % Sr-doped films. It was observed that 2.0 % Sr doping increased the photocatalytic degradation of the ZnO nanorods/CuO nanocomposite films, whereas 4.0 % Sr doping decreased this effect. Thus, the dynamic evaluation of the catalytic performance with TOF yields values of 0.176 and 0.184 for ZnO nanorods/CuO nanocomposites films and ZnO nanorods/CuO:Sr (2.0 %), respectively.

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sr掺杂ZnO纳米棒/CuO纳米复合材料光催化处理亚甲基蓝污染物的纳米工程研究

研究了Sr掺杂对ZnO纳米棒/CuO纳米复合材料物理和光催化性能的影响。研究人员应用了各种技术来了解锶掺杂如何修饰这些薄膜。SEM分析表明ZnO和CuO形成纳米棒或纳米线等结构。与未掺杂的复合材料相比，Sr掺杂样品的聚集性增加，Sr掺杂水平为2.0%和4.0%导致更明显的形态变化。原子力显微镜（AFM）测量表明，随着Sr掺杂水平的增加，平均粗糙度从70.53 nm增加到111.83 nm。XRD分析表明，Sr掺杂率为2.0%和4.0%时，晶体尺寸由未掺杂时的36.20 nm减小到31.55 nm和29.90 nm。FTIR光谱对Sr掺杂引起的化学键变化提供了深入的了解。带隙分析表明，Sr的掺杂增强了ZnO/CuO纳米复合材料的带隙能量，从未掺杂样品的2.41 eV增加到4.0% Sr掺杂时的3.61 eV。电导率测量表明，随着锶掺杂比的增加，总电阻值降低。接触电阻值从未掺杂样品的3.13 × 109 Ω增加到4.0% sr掺杂薄膜的3.22 × 108 Ω。结果表明，2.0%的Sr掺杂提高了ZnO纳米棒/CuO纳米复合膜的光催化降解效果，而4.0%的Sr掺杂则降低了这一效果。因此，ZnO纳米棒/CuO纳米复合膜和ZnO纳米棒/CuO:Sr（2.0%）的TOF产率分别为0.176和0.184，对其催化性能进行了动态评价。

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.