当前位置: X-MOL 学术J. Alloys Compd. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Synergistic Effects in MoS2/Co3O4/Cu2O Nanocomposites for Superior Solar Cell and Photodegradation Efficiency
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2024-11-20 , DOI: 10.1016/j.jallcom.2024.177672
Karthigaimuthu Dharmalingam, Arjun Kumar Bojarajan, Elangovan Thangavel, Pardha Saradhi Maram, Sasirekha Venkidusamy, Sambasivam Sangaraju, Abdel-Hamid I. Mourad

Herein, we synthesized a Cu2O and Co3O4 incorporation with MoS2 to produce MoS2/Co3O4/Cu2O nanocomposites by facile sonication assisted hydrothermal methods. The phase structure and elemental composition of MoS2/Co3O4/Cu2O nanocomposites were investigated using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) morphology studies confirm that MoS2/Co3O4 nanostructure self-assembles in a mixed nanosheet configuration after the introduction of Cu2O. The synthesized samples were used as new types of Pt-free counter electrodes (CE) for DSSCs. Among all, the DSSCs based on the MoS2/Co3O4/Cu2O CE yields a maximum power conversion efficiency of 3.68% (Jsc = 8.2 mA cm-2, Voc = 0.71 mV and FF = 0.629%) under the standard AM 1.5 G illumination, which is 2.5 times higher than that of pure MoS2. To assess the photocatalytic activity, prepared samples were used to suppress methylene blue (MB) and rhodamine B (RhB) dye under UV-visible light irradiation. The MoS2/Co3O4/Cu2O nanocomposites had the highest photocatalytic degradation efficiency of all the samples. It increased degradation efficiency from 43% to 91% for MB dye after 100 minutes, and from 47% to 92% for RhB dye after 90 minutes. Scavengers test analysis proved that the superoxide radical (•O2-) play a major role in the MoS2/Co3O4/Cu2O photocatalytic system. After four consecutive photocatalytic cycles, the crystal structure and surface morphology of the MoS2/Co3O4/Cu2O nanocomposites used in the 4th cycle were more stable, and this was confirmed by SEM, EDAX and XRD studies. The broader significance of these findings provides a straightforward approach for synthesizing a low-cost and high-efficiency MoS2/Co3O4/Cu2O nanocomposite for CE in DSSC photovoltaic cells and facilitates organic pollutant removal through photocatalytic applications.

中文翻译:


MoS2/Co3O4/Cu2O 纳米复合材料的协同效应可实现卓越的太阳能电池和光降解效率



在此,我们合成了 Cu2O 和 Co3O4 与 MoS2 结合,通过简单的超声辅助水热法生产 MoS2/Co3O4/Cu2O 纳米复合材料。使用 X 射线衍射 (XRD) 和 X 射线光电子能谱 (XPS) 技术研究了 MoS2/Co3O4/Cu2O 纳米复合材料的物相结构和元素组成。扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 形态学研究证实,MoS2/Co3O4 纳米结构在引入 Cu2O 后以混合纳米片构型自组装。合成样品用作 DSSC 的新型无 Pt 对电极 (CE)。其中,基于 MoS2/Co3O4/Cu2O CE 的 DSSC 在标准 AM 1.5G 照明下产生的最大功率转换效率为 3.68%(Jsc = 8.2mAcm-2,Voc = 0.71mV 和 FF = 0.629%),比纯 MoS2 高 2.5 倍。为了评估光催化活性,使用制备的样品在紫外可见光照射下抑制亚甲蓝 (MB) 和罗丹明 B (RhB) 染料。MoS2/Co3O4/Cu2O 纳米复合材料在所有样品中具有最高的光催化降解效率。100 分钟后,MB 染料的降解效率从 43% 提高到 91%,RhB 染料的降解效率从 90 分钟后从 47% 提高到 92%。 清除剂测试分析证明,超氧自由基 (•O2-) 在 MoS2/Co3O4/Cu2O 光催化体系中起主要作用。经过连续 4 次光催化循环后,第 4 次循环中使用的 MoS2/Co3O4/Cu2O 纳米复合材料的晶体结构和表面形貌更加稳定,这一点得到了 SEM、EDAX 和 XRD 研究的证实。这些发现的更广泛意义为在 DSSC 光伏电池中合成用于 CE 的低成本和高效率的 MoS2/Co3O4/Cu2O 纳米复合材料提供了一种直接的方法,并有助于通过光催化应用去除有机污染物。
更新日期:2024-11-20
down
wechat
bug