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UV Irradiation as a Versatile Low-Temperature Strategy for Fabricating Templated Mesoporous Titania Films.

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December 2024

Chair for Functional Materials, Department of Physics, TUM School of Natural Sciences, Technical University of Munich, James-Franck-Str. 1, 85748, Garching, Germany.

Mesoporous titania thin films offer promising applications in sensors, batteries, and solar cells. The traditional soft templating methods rely on high-temperature calcination, which is energy-intensive, incompatible with thermosensitive flexible substrates, and destructive for titania structures. This work demonstrates UV irradiation as a versatile low-temperature and energy-saving alternative for mesoporous crystalline titania fabrication.

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TiO-SiO composite oxides with different Ti/Si ratios were synthesized by [sol-gel] method. The highest catalytic activity was obtained over T+S-0.75 loaded with 5 % CoO by in-situ method using cobalt stearate as precursor.

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Chirality is a vital property across various domains, especially for biological activity. Herein, an enzyme-free sensing platform for monosaccharide enantiomer identification was developed by utilizing the Fabry-Pérot interferometer feature of TiO nanotube arrays modified with enantioselective metal-organic framework and glucose oxidase-mimicking Au NPs. In this design, optical property is monitored by reflective interferometric Fourier transform spectroscopy (RIFTS), a highly sensitive technique for detecting changes in the average refractive index within nanotubular structures.

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Article Synopsis
  • - This study focuses on creating and optimizing a new nanocomposite made of titanium oxide and cetyltrimethylammonium bromide (TO@CTAB) that effectively removes malachite green and methyl orange dyes from water, using advanced statistical methods for performance optimization.
  • - The research indicates that TO@CTAB has a mesoporous structure with specific characteristics, and the adsorption of dyes is highly efficient, showing better performance with the Langmuir isotherm model and pseudo-second-order kinetics.
  • - The nanocomposite demonstrates significant reusability over multiple cycles and performs well in treating real wastewater, achieving an 82% decolorization efficiency while also reducing several water quality parameters, making it a cost-effective
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The article reports the synthesis of an ordered mesoporous network of heterophase TiO monoliths as a visible light-responsive photocatalyst using tri-block copolymers of Pluronic F108, P123 and F127 as structure-directing agents (SDAs) and temperature-controlled calcination (450-650 °C) has been carried out by direct templating-assisted hydrothermal approach. The structural/surface morphology and topographical properties of the photocatalyst are characterized using FE-SEM-EDAX, HR-TEM-SAED, p-XRD, VB-XPS, PLS, TG/DTA, UV-Vis-DRS, BET/BJH and zeta potential analysis. The undoped heterophase mesoporous TiO monoliths with in-built lattice/surface defects exhibit visible light photocatalytic properties, successfully dissipating Reactive Brown 10 (RB-10) dye.

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