The present work aims to contribute to giving light to the photocatalytic process, where compounds that have been anionically doped, are discussed. The columnar growth of ZnO films produced through the atomic layer deposition technique and their further nitrogen doping using a nitrogen plasma source are discussed. Those films were tested as photocatalysts to degrade the complex lignin molecule. The procedure started manufacturing ZnO thin films through self-limited reactions of diethylzinc and H2O on either glass, or Si (100) substrates using an atomic layer deposition facility. In a further stage, using a hydrothermal process, highly oriented columnar nanostructures, were grown. Those structures were nitrogen-doped through a nitrogen plasma discharge in homemade glass reactor. The films were characterized by XRD, XPS, SEM, Raman, photoluminescence, and UV-Vis spectroscopies. The results suggest that the silicon substrate and the zinc acetate precursor provide samples with the best photocatalytic performance. Besides, nitrogen doping increases the percentage of lignin degradation compared to undoped films. The methodology here presented provides a viable way to produce high-quality N-ZnO thin films with potential application in the field of photocatalysis.
|Journal||Journal of Photochemistry and Photobiology A: Chemistry|
|State||Published - 1 Dec 2022|
Bibliographical noteFunding Information:
J. Rodríguez-López acknowledges scolarship provided for CONACyT-México. R. Rangel acknowledges CIC-UMSNH-2022 project. The authors thank to CONACYT LAB-2009-01-123913, 292692, 294643, 188345, 204822, and FOMIX-Yucatán 2008-108160, SRE-AMEXCID-2016-1-278320 and Cinvestav Scientific Research and Technological Development No. 98, projects for partially supporting this research. The authors also thank LANBIO, CINVESTAV-IPN, Unidad Mérida. We also acknowledge to D. Aguilar and W. Cauich for their support in the XRD, SEM, and XPS analyzes. To D. Macias and J. Bante for technical help in optical spectroscopy and diffuse reflectance measurements.
© 2022 Elsevier B.V.
- Atomic layer deposition
- Nitrogen plasma doping
- Thin films