Coating of Ordered Large-Pore Mesoporous Silica with TiO₂ Nanoparticles and Evaluation of Its Photocatalytic Activity

• Authors: A. Haghighatzadeh , B. Mazinani , M. Abdolahpour Salari
• Languages of publication: EN

Abstracts

EN

In this work, at first large pore size SiO₂ mesostructure was prepared using amphiphilic triblock copolymer (P123) as a template, tetraethyl orthosilicate (TEOS) as Si source and hexane as micelle expander by hydrothermal procedure. Separately, a stable transparent titania sol was synthesized using titanium isopropoxide (TTIP) as titanium source. Then achieved mesoporous silica structure was stirred in the titania sol resulting in formation of a titanium dioxide anatase layer on the silica structure. The sample was characterized with wide angle X-ray diffraction, N₂ adsorption-desorption analysis, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and energy dispersive X-ray spectroscopy maps of silicon and titanium. The photocatalytic performance of prepared composite material was evaluated using UV-vis spectroscopy as well. The prepared material showed much higher photodegradation of methyl blue (MB) than commercial P-25 which was attributed to high surface area (290 m²/g), anatase phase, small crystallite size and accessible pores.

Keywords

EN

mesoporous; titania; silica; photocatalytic activity

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 3
• Pages: 420-422

Dates

published

2017-09

Contributors

author

A. Haghighatzadeh

• Physics Group, Department of Sciences, Ahvaz Branch, Islamic Azad University, P.O. Box 61349-68875, Ahvaz, Iran

author

B. Mazinani

• Department of Materials Engineering, Malayer University, Malayer, Iran

author

M. Abdolahpour Salari

• Department of Physics, Science Faculty, Ataturk University, 25240, Erzurum, Turkey

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Identifiers

DOI

10.12693/APhysPolA.132.420