Self-assembled TiO2 nanoparticles: mesoporosity, optical and catalytic properties

Herein, we explore the idea of self-assembly of nearly monodisperse nanoparticles as uniform building blocks to design highly crystalline mesoporous TiO2 nanoparticles, through evaporation-induced self-assembly (EISA) and hydrothermal methods by using non-ionic Pluronic F127 and anionic surfactant S...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2010-01, Vol.39 (18), p.4382-4390
Main Authors: Das, Swapan K, Bhunia, Manas K, Bhaumik, Asim
Format: Article
Language:English
Subjects:
Ecology
Nanoparticles
Nanostructure
Optical properties
Pluronic F127
Self assembly
Titanium dioxide
Transmission electron microscopy
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description Herein, we explore the idea of self-assembly of nearly monodisperse nanoparticles as uniform building blocks to design highly crystalline mesoporous TiO2 nanoparticles, through evaporation-induced self-assembly (EISA) and hydrothermal methods by using non-ionic Pluronic F127 and anionic surfactant SDS, respectively as structure directing agents. The small- and wide-angle powder X-ray diffraction and transmission electron microscopy (TEM) are used to characterize the mesophases. N2 adsorption-desorption studies and high-resolution TEM results further reveal that mesopores are formed by the arrangement of the nanoparticles of size ca. 4.0-5.0 nm for SDS-templated and 8.0-9.0 nm for F127-templated TiO2 nanoparticles with broad interparticle pore size distribution. Optical properties of these nanomaterials are studied by UV-visible diffuse-reflectance spectroscopy, photoluminescence (PL) and time-resolved fluorescence (TCSPC). These nanostructured titania exhibited excellent catalytic activity in the photodegradation of ecologically abundant dyes Methylene blue and Rose Bengal under UV-visible light irradiation.
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source Royal Society of Chemistry:Jisc Collections:Royal Society of Chemistry Read and Publish 2022-2024 (reading list)
subjects Ecology
Nanoparticles
Nanostructure
Optical properties
Pluronic F127
Self assembly
Titanium dioxide
Transmission electron microscopy
title Self-assembled TiO2 nanoparticles: mesoporosity, optical and catalytic properties
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