Universiti Teknologi Malaysia Institutional Repository

Cobalt oxide-modified titanium dioxide nanoparticle photocatalyst for degradation of 2,4-dichlorophenoxyacetic acid

Yuliati, L. and Roslan, N. A. and Siah, W. R. and Lintang, H. O. (2017) Cobalt oxide-modified titanium dioxide nanoparticle photocatalyst for degradation of 2,4-dichlorophenoxyacetic acid. Indonesian Journal of Chemistry, 17 (2). pp. 284-290. ISSN 1411-9420

[img]
Preview
PDF
410kB

Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

2,4-dichlorophenoxyacetic acid (2,4-D) has been recognized as a possibly carcinogenic compound to human, therefore, 2,4-D should be treated before it is discharged to the environment. Photocatalytic degradation of 2,4-D has been proposed as one of the best methods that offer environmentally safe process. In the present research, titanium dioxide (TiO2) was modified with cobalt oxide (CoO) and tested for photocatalytic degradation of 2,4-D under UV light irradiation. Different amounts of CoO (0.1, 0.5, 1 and 5 mol%) were added onto TiO2 by an impregnation method. The photocatalytic reaction was monitored and analyzed by measurement of 2,4-D absorbance using UV spectrophotometer. After 1 h photocatalytic reaction, it was confirmed that the sample with low loading of 0.1 mol% gave the highest photocatalytic activity among the bare and modified TiO2 photocatalysts. The photocatalytic activity was decreased with the increase of CoO loading, suggesting that the optimum amount of CoO was an important factor to improve the performance of TiO2. Based on fluorescence spectroscopy, such addition of CoO resulted in the reduced emission intensity, which showed the successful decrease in the electron-hole recombination.

Item Type:Article
Uncontrolled Keywords:2,4-D herbicide, Cobalt oxide, Photocatalyst, Titanium dioxide, UV light
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:74926
Deposited By: Widya Wahid
Deposited On:22 Mar 2018 11:02
Last Modified:22 Mar 2018 11:02

Repository Staff Only: item control page