Enhancement of Photocatalytic Activity for Nanostructured ZnO Thin Film Prepared by Pulsed Spray Pyrolysis | ||
| Egyptian Journal of Chemistry | ||
| Article 25, Volume 63, Issue 6, June 2020, Pages 2331-2344 PDF (2.72 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2019.19253.2181 | ||
| Authors | ||
| Mohamed Obaida1; Ibarhim Moussa1; Shimaa Hassan1; Hassan Afify1; Ahmed Abouelsayed* 2 | ||
| 1Solid State Physics Department, Physics Division, National Research Centre, 33 El Bohouth st. (former El Tahrir st.) - Dokki - Giza - P.O. 12622 - Egypt. | ||
| 2Spectroscopy Department, Physics Division, National Research Centre, 33 El Bohouth st. (former El Tahrir St.) - Dokki - Giza - P.O. 12622 - Egypt. | ||
| Abstract | ||
| Simple pulsed spray pyrsolysis (PSP) technique is used to prepare pure nanostructured zinc oxide (ZnO) thin films at different deposition temperatures and spraying times on glass substrates. XRD measurements show polycrystalline ZnO hexagonal wurtzite phase preferably oriented perpendicular through c- axis along (002) plane. SEM images demonstrate the formation of highly ordered hexagonal nanorods with a crystallite sizes ranged from 40 to 500 nm depending on the film thickness. Optical measurements show transmittance of nearly 90% at low thicknesses (189.1µm) and about 60% for higher thickness (233.8 µm) with a calculated energy band gap values spanning from 2.85 to 3.20 eV. Photocatalytic activity is performed on selected ZnO samples have highly oriented nanorods with large hexagonal cross-section area. Photocatalytic activity takes place on etched and as prepared ZnO film samples by monitoring photodegradation process of methylene blue MB using double beam spectrophotometer. Etched samples show higher photo activity than non- etched ones. | ||
| Keywords | ||
| ZnO thin films; pulsed spray pyrolysis (PSP) technique; selective etching; methylene blue (MB); photocatalysis | ||
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