Enhanced photocatalytic degradation of atrazine by platinized titanium dioxide under 352 nm irradiation
Journal
Water Science and Technology
Journal Volume
75
Journal Volume
75
Journal Issue
5
Journal Issue
5
Pages
1128-1137
Start Page
1128
End Page
1137
ISSN
02731223
Date Issued
2017-03
Author(s)
Chen, Shen-Ming
Lu, Norman
Chen, Jun-Yu
Yang, Cheng-Yu
Yeh, Yun-Peng
Feng, Tsung-Yao
Kokulnathan, Thangavelu
Chen, Dong
Abstract
Simply coating 1 wt.% of platinum on titanium dioxide (TiO2) surface resulted in simple preparation of platinized TiO2 (Pt-TiO2). This study demonstrated the photodegradation of atrazine (ATZ) using either Pt-TiO2 or TiO2 as a photocatalyst under 352 nm light irradiation. The Pt-TiO2-catalyzed ATZ degradation reached 76% in 3 hours without adding H2O2 solution or aeration, which was more than 10% higher than the TiO2-catalyzed reaction. The decomposition product of Pt-TiO2-catalyzed ATZ degradation was mainly cyanuric acid. Thus, Pt-TiO2 as an effective photocatalyst has three main advantages in the photodegradation of ATZ under 352 nm irradiation. First, the coated Pt can facilitate the generation of appropriate amounts of OH radicals, so it can prevent the formation of over-oxidized TiO2. Second, aeration was not needed. Third, the excited electrons were mainly uni-directionally transferred to the catalyst surface to avoid recombination of electron-hole pairs.
Subjects
352 nm
Atrazine
Hydroxyl radical
Platinized TiO2
Schottky barrier effect
SDGs
Publisher
IWA Publishing
Type
journal article