Issue 18, 2010

Self-assembled TiO2nanoparticles: mesoporosity, optical and catalytic properties

Abstract

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
07 Jan 2010
Accepted
10 Mar 2010
First published
24 Mar 2010

Dalton Trans., 2010,39, 4382-4390

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

S. K. Das, M. K. Bhunia and A. Bhaumik, Dalton Trans., 2010, 39, 4382 DOI: 10.1039/C000317D

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