| Autor: |
Hassan HMA; Department of Chemistry, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia., Alsohaimi IH; Department of Chemistry, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia., Essawy AA; Department of Chemistry, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia., El-Aassar MR; Department of Chemistry, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia., Betiha MA; Egyptian Petroleum Research Institute, Cairo 11727, Egypt., Alshammari AH; Physics Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia., Mohamed SK; Department of Chemistry, Faculty of Science, Suez University, Suez 8151650, Egypt. |
| Abstrakt: |
Tailoring high-efficiency photocatalytic composites for various implementations is a major research topic. 1D TNTs-based nanomaterials show promise as a photocatalyst for the remediation of organic pigments in an aqueous solution. Despite this, TiO 2 (TNTs) is only photoactive in the UV range due to its inherent restriction on absorption of light in the UV range. Herein, we provide a facile recipe to tailor the optical characteristics and photocatalytic activity of TNTs by incorporating Zn (II) ionic species via an ion-exchange approach in an aqueous solution. The inclusion of Zn (II) ions into the TNTs framework expands its absorption of light toward the visible light range, therefore TiO 2 nanotubes shows the visible-light photo-performance. Activity performance on photocatalytic decontamination of RhB at ambient temperature demonstrates that Zn-TNTs offer considerable boosted catalytic performance compared with untreated tubular TiO 2 during the illumination of visible light. RhB (10 mg L -1 ) degradation of around 95% was achieved at 120 min. Radical scavenger experiment demonstrated that when electron (e - ) or holes (h + ) scavengers are introduced to the photodegradation process, the assessment of decontamination efficacy decreased by 45% and 76%, respectively. This demonstrates a more efficient engagement of the photoexcited electrons over photogenerated holes in the photodegradation mechanism. Furthermore, there seems to be no significant decrease in the activity of the Zn-TNTs after five consecutive runs. As a result, the fabricated Zn-TNTs composite has a high economic potential in the energy and environmental domains. |
