Characterization of novel solar based nitrogen doped titanium dioxide photocatalytic membrane for wastewater treatment.
| Autor: | Nelson K; Renewable Energy, Nanomaterials, and Water Research Group, Department of Chemical and Process Engineering, Moi University, P.O. Box 3900, Eldoret, Kenya., Mecha AC; Renewable Energy, Nanomaterials, and Water Research Group, Department of Chemical and Process Engineering, Moi University, P.O. Box 3900, Eldoret, Kenya.; Department of Environmental Science, University of Arizona, USA., Kumar A; Department of Chemical and Process Engineering, Moi University, P.O. Box 3900, Eldoret, Kenya. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | Heliyon [Heliyon] 2024 Apr 16; Vol. 10 (8), pp. e29806. Date of Electronic Publication: 2024 Apr 16 (Print Publication: 2024). |
| DOI: | 10.1016/j.heliyon.2024.e29806 |
| Abstrakt: | The increasing presence of microbial and emerging organic contaminants pose detrimental effects on the environment and ecosystem such as diseases, pandemics and toxicity. Most of these synthetic pollutants are biorecalcitrant and therefore persist in the environment. Conventional water treatment methods are not effective thereby necessitating the development of advanced techniques such as photocatalysis and membrane processes. In this study, visible light-driven photocatalytic membrane was synthesized through the immobilization of nitrogen-doped nanoparticles onto the polyvinylidene fluoride (PVDF) membrane and performance evaluated with E.coli microbial contaminant removal. Characterization was done using Fourier transform infrared spectra, X-ray diffraction (XRD), water contact angle, Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX). The Nitrogen-doping of titanium dioxide red-shifted the light absorption to a visible range of 440 nm from 400 nm. Nitrogen dopant was detected at 1420 cm -1 and 1170 cm -1 for nitrogen doped nanoparticles and 1346-1417 cm -1 for nitrogen doped titanium dioxide PVDF membrane. SEM-EDX confirmed presences of nitrogen in nitrogen doped titanium dioxide nanoparticles on membrane surface with nitrogen elemental composition of 0.01 % wt. The water contact angle reduced by 81.39 o from 120.14 o to 38.75 o because of PVA immobilization of nitrogen-doped titanium dioxide and glutaraldehyde crosslinking. Nitrogen doping resulted in visible light active photocatalytic membranes with better hydrophilicity and fouling resistance. 8.42 E.coli log removal and a relative flux of 0.35 was obtained within 75 min. The developed photocatalytic membrane enables the use of sunlight hence a less costly method for decontamination of wastewater. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2024 The Authors.) |
| Databáze: | MEDLINE |
| Externí odkaz: |
|