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Vibrational study of Li-doped ZnO sprayed thin films along with sensors under ethanol vapor and photocatalytic applications
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-09-18 , DOI: 10.1007/s10854-020-04426-z
Mohamed Salah , Wissem Zayani , Brahim Bouricha , Samir Azizi , Abir Alatrache , Mosbah Amlouk , Jilani Lamloumi

This work covers additional physical investigations on lithium-doped ZnO sprayed thin films regarding their both ethanol vapor sensing property as well as photocatalytic applications, in comparison with what have already been published on these films in terms of structural and nanomechanical studies as reported recently by the same authors in Journal of Materials Science: Materials in Electronics 30 (2), 1767–1785 (2019). Herein, vibrational study has been made on Li-doped ZnO sprayed thin films showing that Li doping does not affect vibration modes of ZnO undoped film. Moreover, the photocatalytic performance of Li-doped films has been tested against both Rhodamine B (RhB) and Methylene blue (MB) dyes under UV irradiation. It is found that film prepared using 2% Li content stands for an obvious efficiency power of UV radiation to degrade the dyes. Also, the impact of (\({OH}^{.}\)) and (\({O}_{2}^{.-}\)) radicals on the photocatalytic mechanism was also investigated as a function of the surface roughness effect provided by means of the atomic force microscopy (AFM). A specific emphasis is put on the sensitivity of the ethanol detection by ZnO: Li sensors as a function of working temperature, polarization and gas concentration.



中文翻译:

乙醇蒸汽和光催化作用下掺锂的ZnO喷涂薄膜与传感器的振动研究

这项工作涵盖了有关掺杂锂的ZnO喷涂薄膜的其他物理研究,这些研究涉及乙醇蒸气感测特性和光催化应用,并与这些薄膜最近在结构和纳米力学研究方面已经发表的研究相比较。 《材料科学杂志:电子材料中的材料》 30(2),1767–1785(2019)中的两位作者。在此,对掺锂的ZnO喷涂薄膜进行了振动研究,结果表明,掺锂不会影响ZnO非掺杂薄膜的振动模式。此外,已经在紫外辐射下测试了掺锂薄膜对罗丹明B(RhB)和亚甲基蓝(MB)染料的光催化性能。发现使用2%Li含量制备的膜代表明显的UV辐射效率以降解染料。还研究了光催化机理上的\({OH} ^ {。} \))和(\({O} _ {2} ^ {.-} \))自由基与通过以下方法提供的表面粗糙度效应的关系原子力显微镜(AFM)。特别强调了ZnO:Li传感器检测乙醇的灵敏度与工作温度,极化和气体浓度的关系。

更新日期:2020-09-20
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