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VNUHCM Journal of

Science and Technology Development

An official journal of Viet Nam National University Ho Chi Minh City, Viet Nam since 1997

ISSN: 1859-0128
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Natural Sciences - Research article Open Access Logo

MODIFICATION OF ANATASE TiO2 WITH KF AND ITS PHOTOCATALYTIC ACTIVITY IN VISIBLE REGION

Xuan Thi Kieu Huynh 1, *
Khoa Tien Le 1
Thuy Ngoc Bao Tang 1
Hung Huu Khanh Nguyen 1

  1. University of Science, VNU-HCM
Correspondence to: Xuan Thi Kieu Huynh, University of Science, VNU-HCM. Email: pvphuc@hcmuns.edu.vn.
Volume & Issue: Vol. 13 No. 1 (2010) | Page No.: 22-28 | DOI: 10.32508/stdj.v13i1.2091
Published: 2010-03-30

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Copyright © 2010 by the author(s).

Copyright The Author(s) 2023. This article is published with open access by Vietnam National University, Ho Chi Minh city, Vietnam. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. 

Abstract

In this study, we searched for methods to modify commercial titania in pursuit of new low cost photocatalyst which can operate effectively under visible irradiation. Mixtures of TiO2 and KF were calcined in the region of 800 - 1000°C at different calcine duration to obtain FTO. XRD data indicated the existence of 3 phases K2Ti6013, K4Ti4F10O6.3H20 and anatase. SEM photographs revealed that initial TiO2 particles (TO) had distorted cubic shape and their size ranged from 100 to 500 tun. While FTO particles had cylindrical form of more 1 μm in length. Under visible irradiation, photoactivity of FTO on blue methylene decomposition is equivalent to P25 (conversion 60% after 4 hours) and double TO.

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