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Novel direct dual-Z-scheme ZnO-Er2O3-Yb2O3 heterostructured nanocomposite with superior photocatalytic and antibacterial activity
Materials Letters ( IF 3 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.matlet.2020.127357
Tauseef Munawar , Sadaf Yasmeen , Altaf Hussain , Muhammad Akram , Faisal Iqbal

Abstract In this work, a novel antibacterial and photocatalytic material ZnO-Er2O3-Yb2O3 heterostructured nanocomposite was synthesized by facile co-precipitation technique. The antibacterial activity was performed against S. aureus and E. coli bacteria. The ZOI showed the nanocomposite has higher activity antibacterial against E. coli. The direct optical energy bandgap was 2.9 eV, specified it as a proficient photocatalyst under sunlight illumination. The grown nanocomposite degraded 99.7% MB dye in 40 min under sunlight irradiation. The effect of several operational parameters including catalyst dose, dye concentrations, pH of reaction along with reusability and radical trapping experiment was also studied. The conventional hetero-junction scheme and direct Z-scheme were also proposed to elaborate the photocatalytic mechanism.

中文翻译:

具有优异光催化和抗菌活性的新型直接双 Z 型 ZnO-Er2O3-Yb2O3 异质结构纳米复合材料

摘要 在这项工作中,通过简便的共沉淀技术合成了一种新型抗菌和光催化材料 ZnO-Er2O3-Yb2O3 异质结构纳米复合材料。对金黄色葡萄球菌和大肠杆菌进行抗菌活性。ZOI 表明纳米复合材料对大肠杆菌具有更高的抗菌活性。直接光能带隙为 2.9 eV,是日光照射下的高效光催化剂。在阳光照射下,生长的纳米复合材料在 40 分钟内降解了 99.7% 的 MB 染料。还研究了几个操作参数的影响,包括催化剂剂量、染料浓度、反应的 pH 值以及可重复使用性和自由基捕获实验。还提出了传统的异质结方案和直接 Z 方案来阐述光催化机制。
更新日期:2020-04-01
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