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Title: | Fabrication of TiO2 Spheres and a Visible Light Active α‑Fe2O3/ TiO2‑Rutile/TiO2‑Anatase Heterogeneous Photocatalyst from Natural Ilmenite |
Authors: | Usgodaarachchi, L Thambiliyagodage, C Wijesekera, R Vigneswaran, S Kandanapitiye, M |
Keywords: | Fabrication TiO 2 Spheres Natural Ilmenite Photocatalyst Anatase Heterogeneous Rutile/TiO 2 Fe 2 O 3 /TiO 2 Visible Light |
Issue Date: | 26-Jul-2022 |
Publisher: | researchgate.net |
Citation: | Usgodaarachchi, Leshan & Thambiliyagodage, Charitha & Wijesekera, Ramanee & Vigneswaran, Saravanamuthu & Kandanapitiye, Murthi. (2022). Fabrication of TiO 2 Spheres and a Visible Light Active α-Fe 2 O 3 /TiO 2 -Rutile/TiO 2 -Anatase Heterogeneous Photocatalyst from Natural Ilmenite. ACS Omega. 7. 10.1021/acsomega.2c03262. |
Series/Report no.: | ACS Omega;7, 31, 27617-27637 |
Abstract: | High-purity (98.8%, TiO2) rutile nanoparticles were successfully synthesized using ilmenite sand as the initial titanium source. This novel synthesis method was cost-effective and straightforward due to the absence of the traditional gravity, magnetic, electrostatic separation, ball milling, and smelting processes. Synthesized TiO2 nanoparticles were 99% pure. Also, highly corrosive environmentally hazardous acid leachate generated during the leaching process of ilmenite sand was effectively converted into a highly efficient visible light active photocatalyst. The prepared photocatalyst system consists of anatase-TiO2/rutile-TiO2/Fe2O3 (TF-800), rutile-TiO2/Fe2TiO5 (TFTO-800), and anatase-TiO2/Fe3O4 (TF-450) nanocomposites, respectively. The pseudo-second-order adsorption rate of the TF-800 ternary nanocomposite was 0.126 g mg–1 min–1 in dark conditions, and a 0.044 min–1 visible light initial photodegradation rate was exhibited. The TFTO-800 binary nanocomposite adsorbed methylene blue (MB) following pseudo-second-order adsorption (0.224 g mg–1 min–1) in the dark, and the rate constant for photodegradation of MB in visible light was 0.006 min–1. The prepared TF-450 nanocomposite did not display excellent adsorptive and photocatalytic performances throughout the experiment period. The synthesized TF-800 and TFTO-800 were able to degrade 93.1 and 49.8% of a 100 mL, 10 ppm MB dye solution within 180 min, respectively. |
URI: | http://rda.sliit.lk/handle/123456789/2950 |
ISSN: | 2470-1343 |
Appears in Collections: | Research Papers - School of Natural Sciences School of Natural Sciences |
Files in This Item:
File | Description | Size | Format | |
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acsomegaFabricationofTiO2SpheresandaVisibleLightActive-Fe2O3TiO2-RutileTiO2-AnataseHeterogeneousPhotocatalystfromNaturalIlmenite (1).pdf | 14.89 MB | Adobe PDF | View/Open |
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