We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Integration of WO 3 -Doped MoO 3 with ZnO Photocatalyst for the Removal of 2-Nitrophenol in Natural Sunlight Illumination.
- Authors
Mateen, Sofia; Nawaz, Rabia; Qamar, Muhammad Tariq; Ali, Shahid; Iqbal, Shahid; Aslam, Mohammad; Raheel, Muhammad; Awwad, Nasser S.; Ibrahium, Hala A.
- Abstract
Environmental contamination has become the most pressing issue in recent years. The value of clean water to mankind has sparked interest in heterogeneous photocatalysis. In this study, a novel photocatalyst has been synthesized by integrating WO3-doped MoO3 (WDM) and ZnO through composite formation. The composite nature of the synthesized photocatalyst was confirmed due to the presence of hexagonal ZnO and orthorhombic WDM phases in XRD pattern and scanning electron micrographs. Solid-state absorption spectra and a bandgap analysis showed that WDM-spectral ZnO's response was better than that of pure ZnO. PL and EIS unveiled the effective role of WDM in suppressing the e−–h+ recombination process and charge-transfer resistance, respectively, in ZnO. The photocatalytic studies showed that WDM-ZnO was able to remove ~90% of 30 ppm 2-nitrophenol (2-NP) with a rate of 1.1 × 10−2 min−1, whereas ~65% 2-NP was removed by ZnO (6.1 × 10−3 min−1 rate) under the exposure of natural sunlight (800 × 102 ± 100 lx). Moreover, ~52% higher total organic carbon (TOC) removal was observed by WDM-ZnO as compared to ZnO. The photocatalytic removal of 2-NP by the produced photocatalysts followed the Langmuir–Hinshelwood kinetic model, as shown by the kinetic studies. The reactive oxygen species (ROS)-trapping established that the photocatalytic removal mechanism of 2-NP over WDM-ZnO in sunlight illumination was mainly triggered by the superoxide anion (O2•−) radical, however, the minor role of hydroxyl (•OH) radicals cannot be completely ignored.
- Subjects
ZINC oxide; SUNSHINE; REACTIVE oxygen species; ABSORPTION spectra; RADICALS (Chemistry); SUPEROXIDES; TUNGSTEN trioxide
- Publication
Catalysts (2073-4344), 2023, Vol 13, Issue 9, p1262
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal13091262