2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 18 Intl. Symp on Advanced Materials, Polymers, Composite, Nanomaterials, Nanotechnologies and Manufacturing
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. De Campos, S. Lewis, S. Miller, S. Thomas. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 290 pages |
| ISBN: | 978-1-989820-68-1(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Black TiO2 with enhanced visible light photocatalytic performance for wastewater pollutants degradation
Luminita Andronic1; Cristina CAZAN1;1TRANSILVANIA UNIVERSITY OF BRASOV, Brasov, Romania;
Type of Paper: Regular
Id Paper: 194
Topic: 43
Abstract:
A highly efficient black TiO2 photocatalysts for wastewater treatment were prepared. The synthesis of promising black TiO2 has been focused on optimizing different reductant photocatalytic materials, active under both UV and visible light illumination was synthesized by sol-gel method followed by the chemical reduction of pristine white TiO2. Pristine titanium oxide nanoparticles have been synthesized using the sol-gel method from precursors of titanium isopropoxide, ethanol and nitric acid following by annealing at different temperatures between 400 and 800°C, in air and argon atmospheres. At high temperature, larger particles grow at the smaller particles leading to more nucleation of the nano-clusters and more growth centres. Heat treatment in the synthesis process affects anatase-rutile ratio, crystalline nature of the particles, morphology, and porosity. Colour change of pristine TiO2 powder has been monitored under chemical reduction targeting a higher photocatalytic activity for pesticides, phenolic compounds and drugs degradation under UV and solar irradiation. The narrower bandgap of black TiO2 extends the photoresponse to the visible light region. The black titanium oxide nanoparticles show excellent visible-light photocatalytic activity for pollutants degradation.