Green production of titanium dioxide nanometric particles through electrolytic anodic dissolution of titanium metal.

Autor: Shaarawy HH; Chemical Engineering & Pilot Plant Dep, Engineering Research and Renewable Energy Institute, National Research Centre (NRC), Cairo, 12311, Egypt., Hussein HS; Chemical Engineering & Pilot Plant Dep, Engineering Research and Renewable Energy Institute, National Research Centre (NRC), Cairo, 12311, Egypt. hala.hussein21@yahoo.com., Hussien NH; Chemical Engineering & Pilot Plant Dep, Engineering Research and Renewable Energy Institute, National Research Centre (NRC), Cairo, 12311, Egypt., Al Bazedi GA; Chemical Engineering & Pilot Plant Dep, Engineering Research and Renewable Energy Institute, National Research Centre (NRC), Cairo, 12311, Egypt.; Center of Applied Research On the Environment and Sustainability(CARES), School of Science and Engineering, The American University, Cairo, Egypt., Hawash SI; Chemical Engineering & Pilot Plant Dep, Engineering Research and Renewable Energy Institute, National Research Centre (NRC), Cairo, 12311, Egypt.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Feb; Vol. 30 (9), pp. 24043-24061. Date of Electronic Publication: 2022 Nov 05.
DOI: 10.1007/s11356-022-23766-3
Abstrakt: Nanometric titanium derivatives such as hydroxide and dioxide compounds have a great attention because they are significant industrial material of commercial importance and applications in photocatalyst, semiconductors, and wastewater treatment. The present investigation gives the results of anodic dissolution preparation of titanium hydroxide nanometric particles followed by calcination for complete conversion to nanometric titanium dioxide product. The optimum conditions for the anodic dissolution of titanium metal were pH 4, C.D. 65 mA/cm 2 , 25 °C, 150 rpm, electrode gap distance 3 cm, and NaCl 3 g/l for electrolysis time 240 min and thermally calcinated at 600 °C for 240 min., to reach complete conversion to anatase titanium dioxide nanopowder of main particles size of 77 nm with major percentage of 70%. Chemical and physical characterizations were carried out for evaluation of the obtained products including transmission electron microscope, EDX, XRD, and the scanning advanced electronic diffraction pattern. Preliminary economic indicators were calculated to show that the capital cost of the plant is $1.613 million, with annual operating cost of $0.915 million which means the required investment is $2.528 million. The operating cost for the production of nanometric anatase TiO 2 is $30.5/kg with depreciation excluding the land price.
(© 2022. The Author(s).)
Databáze: MEDLINE
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