Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Insight on TiO2-ZnO Photocomposite Competence Fabricated via Sonication Assisted with Gelatin for Rhodamine B Degradation

Version 1 : Received: 30 September 2020 / Approved: 1 October 2020 / Online: 1 October 2020 (17:03:10 CEST)

How to cite: Toghan, A.; Taha, K.K.; Modwi, A. Insight on TiO2-ZnO Photocomposite Competence Fabricated via Sonication Assisted with Gelatin for Rhodamine B Degradation. Preprints 2020, 2020100026 (doi: 10.20944/preprints202010.0026.v1). Toghan, A.; Taha, K.K.; Modwi, A. Insight on TiO2-ZnO Photocomposite Competence Fabricated via Sonication Assisted with Gelatin for Rhodamine B Degradation. Preprints 2020, 2020100026 (doi: 10.20944/preprints202010.0026.v1).

Abstract

Herewith we report a facile synthesis of zinc oxide doped with (5, 10, 15, and 20 wt%) titanium oxide nanocomposites in gelatin under ultra-sonication. The X-ray diffraction (XRD) data revealed ZnO the formation in addition to a rutile phase TiO2. The ZnO phase size decreased, and the rutile TiO2 phase increased with a TiO2 loading increment. The scanning electron microscopy (SEM) displayed a combination of spherical and hexagonal particles with a 60 – 80 nm size distribution. The prepared nanostructures photocatalytic activity was assisted using Rhodamine B dye, where they showed enhanced photodegradation competence under visible light irradiation. The kinetics of photodegradation followed the first-order kinetics with the 20 % wt sample having the maximum activity. The mechanistic investigation revealed the dominance of h+ and •O2- species during the dye photodegradation. The results indicate the potential application of such gelatin stabilized nanostructures for dye illumination from aqueous solutions under sunlight.

Subject Areas

TiO2-ZnO photocatalysts; gelatin; William-Hall plots; Rhodamine B degradation

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